/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 15:29:35,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 15:29:35,905 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 15:29:35,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 15:29:35,987 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2022-01-18 15:29:35,999 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 15:29:35,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 15:29:35,999 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 15:29:35,999 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 15:29:36,000 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 15:29:36,000 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 15:29:36,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 15:29:36,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 15:29:36,001 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 15:29:36,002 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 15:29:36,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 15:29:36,003 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 15:29:36,003 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 15:29:36,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 15:29:36,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:29:36,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2022-01-18 15:29:36,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 15:29:36,157 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 15:29:36,170 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 15:29:36,172 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 15:29:36,172 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 15:29:36,173 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 15:29:36,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2022-01-18 15:29:36,174 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2022-01-18 15:29:36,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 15:29:36,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 15:29:36,204 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 15:29:36,204 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 15:29:36,204 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 15:29:36,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,216 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,220 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 15:29:36,221 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 15:29:36,222 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 15:29:36,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 15:29:36,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 15:29:36,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,231 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,232 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 15:29:36,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 15:29:36,233 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 15:29:36,233 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 15:29:36,235 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/1) ... [2022-01-18 15:29:36,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 15:29:36,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:36,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-18 15:29:36,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-18 15:29:36,276 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 15:29:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 15:29:36,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 15:29:36,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 15:29:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 15:29:36,277 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 15:29:36,277 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 15:29:36,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 15:29:36,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 15:29:36,278 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 15:29:36,313 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 15:29:36,314 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 15:29:36,388 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 15:29:36,414 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 15:29:36,415 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-18 15:29:36,416 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:29:36 BoogieIcfgContainer [2022-01-18 15:29:36,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 15:29:36,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 15:29:36,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 15:29:36,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 15:29:36,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 03:29:36" (1/2) ... [2022-01-18 15:29:36,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@433b2b77 and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 03:29:36, skipping insertion in model container [2022-01-18 15:29:36,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 03:29:36" (2/2) ... [2022-01-18 15:29:36,425 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2022-01-18 15:29:36,440 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 15:29:36,440 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 15:29:36,440 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 15:29:36,441 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 15:29:36,477 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-01-18 15:29:36,504 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 15:29:36,508 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-18 15:29:36,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-01-18 15:29:36,524 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2022-01-18 15:29:36,535 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 15:29:36,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:36,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:36,540 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:36,543 INFO L85 PathProgramCache]: Analyzing trace with hash -735538883, now seen corresponding path program 1 times [2022-01-18 15:29:36,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:36,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523741858] [2022-01-18 15:29:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:36,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:36,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:36,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:36,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523741858] [2022-01-18 15:29:36,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523741858] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:36,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:36,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:29:36,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567383049] [2022-01-18 15:29:36,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:29:36,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:36,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:29:36,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:29:36,738 INFO L87 Difference]: Start difference. First operand has 28 states, 27 states have (on average 2.2962962962962963) internal successors, (62), 27 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:36,838 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2022-01-18 15:29:36,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:29:36,841 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 15:29:36,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:36,846 INFO L225 Difference]: With dead ends: 52 [2022-01-18 15:29:36,847 INFO L226 Difference]: Without dead ends: 40 [2022-01-18 15:29:36,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:36,850 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:36,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:36,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-18 15:29:36,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2022-01-18 15:29:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2022-01-18 15:29:36,914 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2022-01-18 15:29:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:36,915 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2022-01-18 15:29:36,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2022-01-18 15:29:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-01-18 15:29:36,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:36,916 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:36,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 15:29:36,916 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:36,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:36,917 INFO L85 PathProgramCache]: Analyzing trace with hash -562680131, now seen corresponding path program 2 times [2022-01-18 15:29:36,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:36,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472016202] [2022-01-18 15:29:36,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:36,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:36,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472016202] [2022-01-18 15:29:37,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472016202] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 15:29:37,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830878360] [2022-01-18 15:29:37,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 15:29:37,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 15:29:37,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 15:29:37,055 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,121 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2022-01-18 15:29:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 15:29:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-01-18 15:29:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,122 INFO L225 Difference]: With dead ends: 48 [2022-01-18 15:29:37,122 INFO L226 Difference]: Without dead ends: 39 [2022-01-18 15:29:37,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:37,131 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:37,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-18 15:29:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-01-18 15:29:37,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2022-01-18 15:29:37,139 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2022-01-18 15:29:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,139 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2022-01-18 15:29:37,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2022-01-18 15:29:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-18 15:29:37,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,140 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 15:29:37,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash -93036732, now seen corresponding path program 1 times [2022-01-18 15:29:37,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664444553] [2022-01-18 15:29:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664444553] [2022-01-18 15:29:37,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664444553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 15:29:37,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844632950] [2022-01-18 15:29:37,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 15:29:37,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 15:29:37,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:29:37,169 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,183 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2022-01-18 15:29:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 15:29:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-01-18 15:29:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,185 INFO L225 Difference]: With dead ends: 28 [2022-01-18 15:29:37,185 INFO L226 Difference]: Without dead ends: 28 [2022-01-18 15:29:37,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 15:29:37,186 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:37,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-18 15:29:37,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-18 15:29:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2022-01-18 15:29:37,193 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2022-01-18 15:29:37,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,193 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2022-01-18 15:29:37,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,193 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2022-01-18 15:29:37,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:37,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 15:29:37,194 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1974477913, now seen corresponding path program 1 times [2022-01-18 15:29:37,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016220951] [2022-01-18 15:29:37,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016220951] [2022-01-18 15:29:37,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016220951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:37,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207562576] [2022-01-18 15:29:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:37,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:37,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:37,271 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,346 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2022-01-18 15:29:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:37,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:37,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,347 INFO L225 Difference]: With dead ends: 60 [2022-01-18 15:29:37,347 INFO L226 Difference]: Without dead ends: 53 [2022-01-18 15:29:37,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:29:37,348 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-18 15:29:37,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2022-01-18 15:29:37,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2022-01-18 15:29:37,353 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2022-01-18 15:29:37,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,353 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2022-01-18 15:29:37,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,354 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2022-01-18 15:29:37,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:37,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,354 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-18 15:29:37,355 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,355 INFO L85 PathProgramCache]: Analyzing trace with hash -143453977, now seen corresponding path program 2 times [2022-01-18 15:29:37,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350995646] [2022-01-18 15:29:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350995646] [2022-01-18 15:29:37,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350995646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:37,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831176494] [2022-01-18 15:29:37,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:37,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:37,442 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,512 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2022-01-18 15:29:37,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:37,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:37,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,515 INFO L225 Difference]: With dead ends: 75 [2022-01-18 15:29:37,515 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:29:37,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:37,519 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 28 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:37,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:29:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2022-01-18 15:29:37,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2022-01-18 15:29:37,523 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2022-01-18 15:29:37,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,524 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2022-01-18 15:29:37,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,524 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2022-01-18 15:29:37,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:37,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-18 15:29:37,525 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,525 INFO L85 PathProgramCache]: Analyzing trace with hash -158914773, now seen corresponding path program 3 times [2022-01-18 15:29:37,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449532220] [2022-01-18 15:29:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449532220] [2022-01-18 15:29:37,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449532220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:37,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686675728] [2022-01-18 15:29:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:37,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:37,620 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,683 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2022-01-18 15:29:37,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:37,683 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:37,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,685 INFO L225 Difference]: With dead ends: 63 [2022-01-18 15:29:37,685 INFO L226 Difference]: Without dead ends: 56 [2022-01-18 15:29:37,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:37,699 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 27 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:37,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-18 15:29:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2022-01-18 15:29:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2022-01-18 15:29:37,704 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2022-01-18 15:29:37,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,704 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2022-01-18 15:29:37,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,704 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2022-01-18 15:29:37,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:37,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,705 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-18 15:29:37,708 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1590898453, now seen corresponding path program 4 times [2022-01-18 15:29:37,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913288998] [2022-01-18 15:29:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913288998] [2022-01-18 15:29:37,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913288998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,790 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:37,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96590132] [2022-01-18 15:29:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:37,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:37,791 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:37,872 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2022-01-18 15:29:37,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:37,874 INFO L225 Difference]: With dead ends: 81 [2022-01-18 15:29:37,874 INFO L226 Difference]: Without dead ends: 74 [2022-01-18 15:29:37,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:37,876 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:37,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-18 15:29:37,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2022-01-18 15:29:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2022-01-18 15:29:37,893 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2022-01-18 15:29:37,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:37,893 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2022-01-18 15:29:37,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:37,893 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2022-01-18 15:29:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:37,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:37,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:37,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-18 15:29:37,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:37,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:37,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1575437657, now seen corresponding path program 5 times [2022-01-18 15:29:37,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:37,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856718624] [2022-01-18 15:29:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:37,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:37,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:37,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:37,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856718624] [2022-01-18 15:29:37,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856718624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:37,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:37,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:37,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499425195] [2022-01-18 15:29:37,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:37,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:37,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:37,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:37,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:37,949 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:38,003 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2022-01-18 15:29:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:38,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:38,004 INFO L225 Difference]: With dead ends: 83 [2022-01-18 15:29:38,004 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 15:29:38,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:38,004 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:38,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 15:29:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2022-01-18 15:29:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2022-01-18 15:29:38,007 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2022-01-18 15:29:38,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:38,008 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2022-01-18 15:29:38,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,008 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2022-01-18 15:29:38,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-18 15:29:38,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:38,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:38,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-18 15:29:38,008 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:38,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:38,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1801579449, now seen corresponding path program 6 times [2022-01-18 15:29:38,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:38,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771133108] [2022-01-18 15:29:38,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:38,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771133108] [2022-01-18 15:29:38,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771133108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:38,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:38,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-18 15:29:38,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915930457] [2022-01-18 15:29:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:38,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:38,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:38,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:38,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:38,077 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:38,146 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2022-01-18 15:29:38,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-18 15:29:38,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-01-18 15:29:38,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:38,147 INFO L225 Difference]: With dead ends: 68 [2022-01-18 15:29:38,147 INFO L226 Difference]: Without dead ends: 61 [2022-01-18 15:29:38,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-18 15:29:38,148 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 25 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:38,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 26 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-18 15:29:38,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2022-01-18 15:29:38,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2022-01-18 15:29:38,151 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2022-01-18 15:29:38,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:38,151 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2022-01-18 15:29:38,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,151 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2022-01-18 15:29:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:38,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:38,152 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:38,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-18 15:29:38,152 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:38,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:38,153 INFO L85 PathProgramCache]: Analyzing trace with hash 588701292, now seen corresponding path program 1 times [2022-01-18 15:29:38,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:38,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694164259] [2022-01-18 15:29:38,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694164259] [2022-01-18 15:29:38,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694164259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763419474] [2022-01-18 15:29:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:38,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:38,204 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:38,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 15:29:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:29:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:38,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763419474] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:38,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:38,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-01-18 15:29:38,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469413401] [2022-01-18 15:29:38,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:38,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-18 15:29:38,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:38,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-18 15:29:38,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-18 15:29:38,451 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:38,496 INFO L93 Difference]: Finished difference Result 63 states and 119 transitions. [2022-01-18 15:29:38,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:38,498 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:38,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:38,498 INFO L225 Difference]: With dead ends: 63 [2022-01-18 15:29:38,498 INFO L226 Difference]: Without dead ends: 63 [2022-01-18 15:29:38,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:38,499 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:38,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-18 15:29:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 40. [2022-01-18 15:29:38,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 79 transitions. [2022-01-18 15:29:38,505 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 79 transitions. Word has length 13 [2022-01-18 15:29:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:38,505 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 79 transitions. [2022-01-18 15:29:38,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 79 transitions. [2022-01-18 15:29:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:38,509 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:38,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:38,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:38,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-18 15:29:38,724 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:38,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:38,724 INFO L85 PathProgramCache]: Analyzing trace with hash -169612380, now seen corresponding path program 1 times [2022-01-18 15:29:38,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:38,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877080169] [2022-01-18 15:29:38,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:38,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:38,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877080169] [2022-01-18 15:29:38,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877080169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:38,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:38,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:38,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208961047] [2022-01-18 15:29:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:38,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:38,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:38,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:38,758 INFO L87 Difference]: Start difference. First operand 40 states and 79 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:38,796 INFO L93 Difference]: Finished difference Result 66 states and 121 transitions. [2022-01-18 15:29:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:38,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:38,797 INFO L225 Difference]: With dead ends: 66 [2022-01-18 15:29:38,797 INFO L226 Difference]: Without dead ends: 58 [2022-01-18 15:29:38,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:38,797 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:38,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:38,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-01-18 15:29:38,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2022-01-18 15:29:38,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2022-01-18 15:29:38,801 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2022-01-18 15:29:38,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:38,802 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2022-01-18 15:29:38,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:38,802 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2022-01-18 15:29:38,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:38,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:38,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:38,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-18 15:29:38,802 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:38,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash -161895846, now seen corresponding path program 2 times [2022-01-18 15:29:38,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:38,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831912022] [2022-01-18 15:29:38,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:38,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831912022] [2022-01-18 15:29:38,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831912022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:38,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473330517] [2022-01-18 15:29:38,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:38,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:38,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:38,833 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:38,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 15:29:38,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:29:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:38,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:38,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473330517] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:38,979 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:38,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:29:38,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097260742] [2022-01-18 15:29:38,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:38,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:29:38,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:29:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:38,980 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:39,016 INFO L93 Difference]: Finished difference Result 65 states and 120 transitions. [2022-01-18 15:29:39,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:39,016 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:39,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:39,017 INFO L225 Difference]: With dead ends: 65 [2022-01-18 15:29:39,017 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 15:29:39,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:39,017 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:39,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:39,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 15:29:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 41. [2022-01-18 15:29:39,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 81 transitions. [2022-01-18 15:29:39,022 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 81 transitions. Word has length 13 [2022-01-18 15:29:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:39,023 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 81 transitions. [2022-01-18 15:29:39,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 81 transitions. [2022-01-18 15:29:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:39,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:39,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:39,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-18 15:29:39,251 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 757554788, now seen corresponding path program 2 times [2022-01-18 15:29:39,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:39,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963872738] [2022-01-18 15:29:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:39,252 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:39,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:39,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963872738] [2022-01-18 15:29:39,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963872738] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:39,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:39,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:39,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436832552] [2022-01-18 15:29:39,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:39,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:39,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:39,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:39,304 INFO L87 Difference]: Start difference. First operand 41 states and 81 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:39,352 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2022-01-18 15:29:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:39,352 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:39,353 INFO L225 Difference]: With dead ends: 79 [2022-01-18 15:29:39,353 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 15:29:39,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:39,353 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:39,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:39,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 15:29:39,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2022-01-18 15:29:39,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2022-01-18 15:29:39,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2022-01-18 15:29:39,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:39,356 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2022-01-18 15:29:39,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,356 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2022-01-18 15:29:39,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:39,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:39,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:39,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-18 15:29:39,357 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:39,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:39,357 INFO L85 PathProgramCache]: Analyzing trace with hash -748811448, now seen corresponding path program 3 times [2022-01-18 15:29:39,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:39,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392563765] [2022-01-18 15:29:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:39,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:39,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392563765] [2022-01-18 15:29:39,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392563765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:39,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:39,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:39,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500416738] [2022-01-18 15:29:39,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:39,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:39,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:39,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:39,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:39,390 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:39,423 INFO L93 Difference]: Finished difference Result 50 states and 95 transitions. [2022-01-18 15:29:39,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:39,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:39,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:39,424 INFO L225 Difference]: With dead ends: 50 [2022-01-18 15:29:39,424 INFO L226 Difference]: Without dead ends: 48 [2022-01-18 15:29:39,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:39,425 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:39,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 18 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:39,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-18 15:29:39,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2022-01-18 15:29:39,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.0) internal successors, (88), 44 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 88 transitions. [2022-01-18 15:29:39,428 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 88 transitions. Word has length 13 [2022-01-18 15:29:39,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:39,428 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 88 transitions. [2022-01-18 15:29:39,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 88 transitions. [2022-01-18 15:29:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:39,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:39,429 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:39,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-18 15:29:39,429 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1878279264, now seen corresponding path program 3 times [2022-01-18 15:29:39,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:39,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646277752] [2022-01-18 15:29:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:39,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:39,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646277752] [2022-01-18 15:29:39,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646277752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:39,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:39,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:39,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803547452] [2022-01-18 15:29:39,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:39,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:39,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:39,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:39,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:39,471 INFO L87 Difference]: Start difference. First operand 45 states and 88 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:39,513 INFO L93 Difference]: Finished difference Result 62 states and 117 transitions. [2022-01-18 15:29:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:39,514 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:39,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:39,514 INFO L225 Difference]: With dead ends: 62 [2022-01-18 15:29:39,514 INFO L226 Difference]: Without dead ends: 62 [2022-01-18 15:29:39,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:39,516 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 14 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:39,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 29 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:39,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-18 15:29:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-01-18 15:29:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2022-01-18 15:29:39,518 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2022-01-18 15:29:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:39,518 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2022-01-18 15:29:39,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2022-01-18 15:29:39,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:39,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:39,519 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:39,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-18 15:29:39,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 2063421932, now seen corresponding path program 4 times [2022-01-18 15:29:39,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:39,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905515597] [2022-01-18 15:29:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:39,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:39,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905515597] [2022-01-18 15:29:39,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905515597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242224726] [2022-01-18 15:29:39,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:39,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:39,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:39,580 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:39,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 15:29:39,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:39,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:39,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-18 15:29:39,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:39,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:39,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242224726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:39,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:39,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-01-18 15:29:39,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994100205] [2022-01-18 15:29:39,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:39,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-18 15:29:39,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-18 15:29:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:39,744 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:39,788 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-01-18 15:29:39,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:39,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:39,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:39,789 INFO L225 Difference]: With dead ends: 62 [2022-01-18 15:29:39,789 INFO L226 Difference]: Without dead ends: 62 [2022-01-18 15:29:39,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-18 15:29:39,790 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:39,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 36 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:39,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-18 15:29:39,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2022-01-18 15:29:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2022-01-18 15:29:39,792 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2022-01-18 15:29:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:39,792 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2022-01-18 15:29:39,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:39,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2022-01-18 15:29:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:39,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:39,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:39,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:40,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:40,012 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1312094730, now seen corresponding path program 4 times [2022-01-18 15:29:40,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102646036] [2022-01-18 15:29:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102646036] [2022-01-18 15:29:40,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102646036] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:40,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:40,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:40,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230684740] [2022-01-18 15:29:40,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:40,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:40,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:40,040 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,081 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2022-01-18 15:29:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:40,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:40,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,081 INFO L225 Difference]: With dead ends: 62 [2022-01-18 15:29:40,081 INFO L226 Difference]: Without dead ends: 59 [2022-01-18 15:29:40,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:40,082 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 21 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-18 15:29:40,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-01-18 15:29:40,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2022-01-18 15:29:40,084 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2022-01-18 15:29:40,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,084 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2022-01-18 15:29:40,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,084 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2022-01-18 15:29:40,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:40,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,085 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-18 15:29:40,085 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1476506330, now seen corresponding path program 5 times [2022-01-18 15:29:40,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151828818] [2022-01-18 15:29:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151828818] [2022-01-18 15:29:40,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151828818] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:40,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:40,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:40,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926525230] [2022-01-18 15:29:40,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:40,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:40,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:40,110 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,145 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2022-01-18 15:29:40,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:40,145 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,146 INFO L225 Difference]: With dead ends: 65 [2022-01-18 15:29:40,146 INFO L226 Difference]: Without dead ends: 63 [2022-01-18 15:29:40,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:40,146 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-18 15:29:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2022-01-18 15:29:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 45 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 89 transitions. [2022-01-18 15:29:40,148 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 89 transitions. Word has length 13 [2022-01-18 15:29:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,148 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 89 transitions. [2022-01-18 15:29:40,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 89 transitions. [2022-01-18 15:29:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:40,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-18 15:29:40,149 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash -191370254, now seen corresponding path program 5 times [2022-01-18 15:29:40,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552247093] [2022-01-18 15:29:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552247093] [2022-01-18 15:29:40,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552247093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:40,174 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:40,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:40,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622107406] [2022-01-18 15:29:40,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:40,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:40,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:40,175 INFO L87 Difference]: Start difference. First operand 46 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,213 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2022-01-18 15:29:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,213 INFO L225 Difference]: With dead ends: 62 [2022-01-18 15:29:40,213 INFO L226 Difference]: Without dead ends: 62 [2022-01-18 15:29:40,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:40,214 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:40,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-18 15:29:40,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2022-01-18 15:29:40,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2022-01-18 15:29:40,216 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2022-01-18 15:29:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,216 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2022-01-18 15:29:40,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,216 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2022-01-18 15:29:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:40,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,216 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-18 15:29:40,216 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,217 INFO L85 PathProgramCache]: Analyzing trace with hash -131808852, now seen corresponding path program 6 times [2022-01-18 15:29:40,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899342946] [2022-01-18 15:29:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899342946] [2022-01-18 15:29:40,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899342946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:40,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:40,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:40,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625137542] [2022-01-18 15:29:40,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:40,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:40,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:40,241 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,292 INFO L93 Difference]: Finished difference Result 47 states and 88 transitions. [2022-01-18 15:29:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:40,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,293 INFO L225 Difference]: With dead ends: 47 [2022-01-18 15:29:40,293 INFO L226 Difference]: Without dead ends: 43 [2022-01-18 15:29:40,293 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:40,293 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-18 15:29:40,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-18 15:29:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.9761904761904763) internal successors, (83), 42 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 83 transitions. [2022-01-18 15:29:40,300 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 83 transitions. Word has length 13 [2022-01-18 15:29:40,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,300 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 83 transitions. [2022-01-18 15:29:40,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 83 transitions. [2022-01-18 15:29:40,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-18 15:29:40,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-18 15:29:40,302 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,302 INFO L85 PathProgramCache]: Analyzing trace with hash -188744478, now seen corresponding path program 6 times [2022-01-18 15:29:40,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83335400] [2022-01-18 15:29:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83335400] [2022-01-18 15:29:40,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83335400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 15:29:40,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 15:29:40,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-18 15:29:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309026203] [2022-01-18 15:29:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 15:29:40,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 15:29:40,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:40,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 15:29:40,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-18 15:29:40,330 INFO L87 Difference]: Start difference. First operand 43 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:40,374 INFO L93 Difference]: Finished difference Result 45 states and 86 transitions. [2022-01-18 15:29:40,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 15:29:40,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-01-18 15:29:40,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:40,375 INFO L225 Difference]: With dead ends: 45 [2022-01-18 15:29:40,375 INFO L226 Difference]: Without dead ends: 45 [2022-01-18 15:29:40,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-18 15:29:40,375 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:40,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 16 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 15:29:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-01-18 15:29:40,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2022-01-18 15:29:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.9473684210526316) internal successors, (74), 38 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2022-01-18 15:29:40,377 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2022-01-18 15:29:40,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:40,377 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2022-01-18 15:29:40,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:40,377 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2022-01-18 15:29:40,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:40,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:40,377 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:40,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-18 15:29:40,377 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:40,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1979531647, now seen corresponding path program 1 times [2022-01-18 15:29:40,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116038267] [2022-01-18 15:29:40,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116038267] [2022-01-18 15:29:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116038267] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415249751] [2022-01-18 15:29:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:40,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:40,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:40,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:40,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 15:29:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:40,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:40,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:40,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:29:40,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:29:41,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:41,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:41,755 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:41,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 116 [2022-01-18 15:29:41,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:41,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 96 [2022-01-18 15:29:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:41,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415249751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:41,880 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:41,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:29:41,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866516569] [2022-01-18 15:29:41,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:41,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:29:41,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:41,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:29:41,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:29:41,881 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:42,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:42,316 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2022-01-18 15:29:42,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:42,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:42,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:42,316 INFO L225 Difference]: With dead ends: 78 [2022-01-18 15:29:42,317 INFO L226 Difference]: Without dead ends: 71 [2022-01-18 15:29:42,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:29:42,317 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:42,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 71 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:29:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-18 15:29:42,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-01-18 15:29:42,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:42,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2022-01-18 15:29:42,319 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2022-01-18 15:29:42,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:42,319 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2022-01-18 15:29:42,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:42,319 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2022-01-18 15:29:42,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:42,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:42,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:42,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:42,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:42,531 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:42,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:42,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1388268481, now seen corresponding path program 2 times [2022-01-18 15:29:42,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:42,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247059712] [2022-01-18 15:29:42,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:42,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:42,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:42,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247059712] [2022-01-18 15:29:42,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247059712] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:42,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075313848] [2022-01-18 15:29:42,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:42,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:42,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:42,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:42,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 15:29:42,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:42,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:42,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:42,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:43,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 105 [2022-01-18 15:29:43,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 85 [2022-01-18 15:29:43,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:43,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:43,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:43,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 110 [2022-01-18 15:29:43,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:43,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 92 [2022-01-18 15:29:43,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:43,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075313848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:43,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:43,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:29:43,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262636194] [2022-01-18 15:29:43,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:43,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:29:43,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:43,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:29:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:29:43,976 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:44,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:44,274 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2022-01-18 15:29:44,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:44,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:44,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:44,276 INFO L225 Difference]: With dead ends: 82 [2022-01-18 15:29:44,276 INFO L226 Difference]: Without dead ends: 75 [2022-01-18 15:29:44,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:29:44,277 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:44,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 84 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:44,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-18 15:29:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2022-01-18 15:29:44,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:44,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2022-01-18 15:29:44,280 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 14 [2022-01-18 15:29:44,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:44,280 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2022-01-18 15:29:44,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.125) internal successors, (34), 16 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:44,280 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2022-01-18 15:29:44,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:44,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:44,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:44,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:44,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-01-18 15:29:44,481 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:44,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:44,482 INFO L85 PathProgramCache]: Analyzing trace with hash -267544005, now seen corresponding path program 3 times [2022-01-18 15:29:44,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:44,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745765500] [2022-01-18 15:29:44,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:44,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:44,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745765500] [2022-01-18 15:29:44,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745765500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:44,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501432123] [2022-01-18 15:29:44,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:29:44,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:44,655 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:44,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 15:29:44,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:29:44,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:44,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:44,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:44,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-01-18 15:29:44,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 82 [2022-01-18 15:29:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:45,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:45,540 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:45,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 120 [2022-01-18 15:29:45,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:45,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2022-01-18 15:29:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:45,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501432123] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:45,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:45,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:29:45,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426019408] [2022-01-18 15:29:45,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:45,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:29:45,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:45,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:29:45,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:29:45,698 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:46,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:46,037 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2022-01-18 15:29:46,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:29:46,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:46,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:46,038 INFO L225 Difference]: With dead ends: 95 [2022-01-18 15:29:46,038 INFO L226 Difference]: Without dead ends: 88 [2022-01-18 15:29:46,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:29:46,039 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:46,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 70 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:46,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-18 15:29:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2022-01-18 15:29:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2022-01-18 15:29:46,041 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2022-01-18 15:29:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:46,041 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2022-01-18 15:29:46,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2022-01-18 15:29:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:46,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:46,041 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:46,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:46,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:46,255 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:46,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash -283004801, now seen corresponding path program 4 times [2022-01-18 15:29:46,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:46,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104886602] [2022-01-18 15:29:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:46,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:46,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104886602] [2022-01-18 15:29:46,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104886602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:46,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828893939] [2022-01-18 15:29:46,431 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:46,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:46,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:46,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:46,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 15:29:46,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:46,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:46,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:46,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:46,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 104 [2022-01-18 15:29:46,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 82 [2022-01-18 15:29:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:46,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:47,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:47,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 122 [2022-01-18 15:29:47,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:47,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 102 [2022-01-18 15:29:47,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:47,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828893939] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:47,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:47,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:29:47,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511937355] [2022-01-18 15:29:47,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:47,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:29:47,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:47,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:29:47,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:29:47,566 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:47,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:47,899 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2022-01-18 15:29:47,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:29:47,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:47,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:47,899 INFO L225 Difference]: With dead ends: 83 [2022-01-18 15:29:47,899 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 15:29:47,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:29:47,900 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:47,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 61 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:47,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 15:29:47,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2022-01-18 15:29:47,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:47,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2022-01-18 15:29:47,902 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2022-01-18 15:29:47,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:47,902 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2022-01-18 15:29:47,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2022-01-18 15:29:47,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:47,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:47,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:47,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:48,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:48,121 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:48,122 INFO L85 PathProgramCache]: Analyzing trace with hash 185856849, now seen corresponding path program 5 times [2022-01-18 15:29:48,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:48,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58616099] [2022-01-18 15:29:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:48,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:48,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58616099] [2022-01-18 15:29:48,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58616099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:48,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696595573] [2022-01-18 15:29:48,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:29:48,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:48,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:48,359 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 15:29:48,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:48,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:48,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:48,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:48,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:29:48,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:29:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:48,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:49,183 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:49,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:29:49,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:29:49,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:49,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696595573] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:49,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:49,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:29:49,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620821026] [2022-01-18 15:29:49,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:49,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:29:49,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:29:49,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:29:49,202 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:49,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:49,520 INFO L93 Difference]: Finished difference Result 68 states and 129 transitions. [2022-01-18 15:29:49,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:49,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:49,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:49,521 INFO L225 Difference]: With dead ends: 68 [2022-01-18 15:29:49,521 INFO L226 Difference]: Without dead ends: 61 [2022-01-18 15:29:49,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:29:49,522 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:49,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 77 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:49,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-18 15:29:49,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-01-18 15:29:49,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:49,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2022-01-18 15:29:49,525 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2022-01-18 15:29:49,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:49,525 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2022-01-18 15:29:49,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:49,525 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2022-01-18 15:29:49,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:49,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:49,525 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:49,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-18 15:29:49,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-01-18 15:29:49,739 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:49,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:49,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1306581325, now seen corresponding path program 6 times [2022-01-18 15:29:49,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:49,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567961582] [2022-01-18 15:29:49,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:49,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:49,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:49,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567961582] [2022-01-18 15:29:49,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567961582] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:49,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207886741] [2022-01-18 15:29:49,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:49,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:49,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:49,913 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:49,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 15:29:49,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:29:49,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:49,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:49,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:50,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:29:50,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:50,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:29:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:50,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:50,822 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:50,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 124 [2022-01-18 15:29:50,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:50,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2022-01-18 15:29:51,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:51,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207886741] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:51,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:51,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:29:51,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130767518] [2022-01-18 15:29:51,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:51,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:29:51,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:51,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:29:51,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:29:51,013 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:51,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:51,163 INFO L93 Difference]: Finished difference Result 77 states and 143 transitions. [2022-01-18 15:29:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:51,164 INFO L225 Difference]: With dead ends: 77 [2022-01-18 15:29:51,164 INFO L226 Difference]: Without dead ends: 70 [2022-01-18 15:29:51,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:29:51,164 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:51,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 60 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:29:51,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-18 15:29:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 54. [2022-01-18 15:29:51,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2022-01-18 15:29:51,166 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2022-01-18 15:29:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:51,166 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2022-01-18 15:29:51,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2022-01-18 15:29:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:51,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:51,166 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:51,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:51,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 15:29:51,367 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1291120529, now seen corresponding path program 7 times [2022-01-18 15:29:51,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490834650] [2022-01-18 15:29:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:51,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:51,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490834650] [2022-01-18 15:29:51,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490834650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432024244] [2022-01-18 15:29:51,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:29:51,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:51,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:51,521 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:51,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 15:29:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:51,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:51,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:51,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:51,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:29:51,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:51,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:29:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:51,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:52,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:52,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 139 treesize of output 127 [2022-01-18 15:29:52,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:52,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 107 [2022-01-18 15:29:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:52,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432024244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:52,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:52,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:29:52,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079963358] [2022-01-18 15:29:52,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:52,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:29:52,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:29:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:29:52,580 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:52,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:52,736 INFO L93 Difference]: Finished difference Result 68 states and 130 transitions. [2022-01-18 15:29:52,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:52,736 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:52,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:52,737 INFO L225 Difference]: With dead ends: 68 [2022-01-18 15:29:52,737 INFO L226 Difference]: Without dead ends: 61 [2022-01-18 15:29:52,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:29:52,737 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 20 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:52,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 55 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 155 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:29:52,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-18 15:29:52,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 52. [2022-01-18 15:29:52,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:52,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2022-01-18 15:29:52,739 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2022-01-18 15:29:52,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:52,739 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2022-01-18 15:29:52,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:52,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2022-01-18 15:29:52,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:52,739 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:52,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:52,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:52,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-18 15:29:52,955 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:52,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:52,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1912674815, now seen corresponding path program 8 times [2022-01-18 15:29:52,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:52,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353607075] [2022-01-18 15:29:52,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:52,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:52,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:53,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353607075] [2022-01-18 15:29:53,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353607075] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:53,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159761338] [2022-01-18 15:29:53,151 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:29:53,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:53,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:53,156 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:53,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 15:29:53,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:53,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:53,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:53,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:53,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:53,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:29:53,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:53,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:29:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:53,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:53,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:53,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 131 [2022-01-18 15:29:53,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:53,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 111 [2022-01-18 15:29:54,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:54,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159761338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:54,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:54,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:29:54,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019041157] [2022-01-18 15:29:54,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:54,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:29:54,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:29:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:29:54,109 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:54,300 INFO L93 Difference]: Finished difference Result 79 states and 146 transitions. [2022-01-18 15:29:54,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:54,300 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:54,300 INFO L225 Difference]: With dead ends: 79 [2022-01-18 15:29:54,300 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:29:54,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:29:54,301 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:54,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 73 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:29:54,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-01-18 15:29:54,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2022-01-18 15:29:54,302 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2022-01-18 15:29:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:54,302 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2022-01-18 15:29:54,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2022-01-18 15:29:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:54,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:54,303 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:54,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:54,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-18 15:29:54,508 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:54,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1928135611, now seen corresponding path program 9 times [2022-01-18 15:29:54,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:54,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894574723] [2022-01-18 15:29:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:54,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:54,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894574723] [2022-01-18 15:29:54,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894574723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:54,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647004657] [2022-01-18 15:29:54,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:29:54,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:54,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:54,704 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:54,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 15:29:54,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:29:54,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:54,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:54,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:54,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:54,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:29:54,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:54,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:29:55,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:55,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:55,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:55,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 123 [2022-01-18 15:29:55,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:55,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 103 [2022-01-18 15:29:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:55,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647004657] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:55,655 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:55,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:29:55,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105685041] [2022-01-18 15:29:55,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:55,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:29:55,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:55,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:29:55,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:29:55,656 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:55,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:55,970 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2022-01-18 15:29:55,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:55,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:55,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:55,971 INFO L225 Difference]: With dead ends: 81 [2022-01-18 15:29:55,971 INFO L226 Difference]: Without dead ends: 74 [2022-01-18 15:29:55,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:29:55,972 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:55,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 63 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-18 15:29:55,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2022-01-18 15:29:55,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:55,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2022-01-18 15:29:55,977 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2022-01-18 15:29:55,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:55,977 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2022-01-18 15:29:55,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:55,977 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2022-01-18 15:29:55,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:55,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:55,977 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:55,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:56,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:56,183 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:56,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:56,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1795376879, now seen corresponding path program 10 times [2022-01-18 15:29:56,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:56,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798294714] [2022-01-18 15:29:56,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:56,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:56,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:56,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:56,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798294714] [2022-01-18 15:29:56,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798294714] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:56,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597035893] [2022-01-18 15:29:56,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:29:56,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:56,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:56,326 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:56,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 15:29:56,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:29:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:56,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:56,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:56,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:29:56,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:56,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:29:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:56,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:57,200 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:57,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 124 [2022-01-18 15:29:57,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:29:57,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2022-01-18 15:29:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597035893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:57,349 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:57,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:29:57,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872907341] [2022-01-18 15:29:57,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:57,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:29:57,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:29:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:29:57,350 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:57,536 INFO L93 Difference]: Finished difference Result 66 states and 124 transitions. [2022-01-18 15:29:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:57,537 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:57,537 INFO L225 Difference]: With dead ends: 66 [2022-01-18 15:29:57,537 INFO L226 Difference]: Without dead ends: 59 [2022-01-18 15:29:57,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:29:57,538 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:57,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 63 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-01-18 15:29:57,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2022-01-18 15:29:57,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:57,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2022-01-18 15:29:57,539 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2022-01-18 15:29:57,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:57,539 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2022-01-18 15:29:57,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2022-01-18 15:29:57,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:57,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:57,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:57,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 15:29:57,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-01-18 15:29:57,755 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash 451231231, now seen corresponding path program 11 times [2022-01-18 15:29:57,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:57,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987605467] [2022-01-18 15:29:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:57,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:57,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987605467] [2022-01-18 15:29:57,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987605467] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:57,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428927443] [2022-01-18 15:29:57,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:29:57,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:57,968 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:57,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 15:29:57,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:29:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:57,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:57,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:58,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:29:58,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:29:58,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:58,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:29:58,754 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:29:58,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:29:58,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:29:58,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:58,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428927443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:29:58,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:29:58,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:29:58,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249406523] [2022-01-18 15:29:58,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:29:58,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:29:58,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:29:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:29:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:29:58,772 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:59,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:29:59,096 INFO L93 Difference]: Finished difference Result 72 states and 137 transitions. [2022-01-18 15:29:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:29:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:29:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:29:59,097 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:29:59,097 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 15:29:59,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:29:59,098 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:29:59,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 78 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:29:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 15:29:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-18 15:29:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2022-01-18 15:29:59,099 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2022-01-18 15:29:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:29:59,099 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2022-01-18 15:29:59,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:29:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2022-01-18 15:29:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:29:59,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:29:59,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:29:59,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-18 15:29:59,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:59,315 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:29:59,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:29:59,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1571955707, now seen corresponding path program 12 times [2022-01-18 15:29:59,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:29:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398516729] [2022-01-18 15:29:59,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:29:59,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:29:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:29:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:59,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:29:59,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398516729] [2022-01-18 15:29:59,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398516729] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:29:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127444347] [2022-01-18 15:29:59,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:29:59,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:29:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:29:59,457 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:29:59,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 15:29:59,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:29:59,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:29:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:29:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:29:59,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:59,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:29:59,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:29:59,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:29:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:29:59,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:00,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:00,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 123 [2022-01-18 15:30:00,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:00,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 103 [2022-01-18 15:30:00,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:00,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127444347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:00,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:00,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:30:00,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178694299] [2022-01-18 15:30:00,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:00,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:30:00,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:00,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:30:00,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:00,473 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:00,628 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2022-01-18 15:30:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:00,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:00,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:00,629 INFO L225 Difference]: With dead ends: 87 [2022-01-18 15:30:00,629 INFO L226 Difference]: Without dead ends: 80 [2022-01-18 15:30:00,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:00,629 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:00,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 77 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:00,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-18 15:30:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2022-01-18 15:30:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2022-01-18 15:30:00,631 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2022-01-18 15:30:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:00,631 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2022-01-18 15:30:00,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2022-01-18 15:30:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:00,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:00,631 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:00,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:00,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:00,846 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:00,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1556494911, now seen corresponding path program 13 times [2022-01-18 15:30:00,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:00,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535972547] [2022-01-18 15:30:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:00,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:00,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:00,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535972547] [2022-01-18 15:30:00,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535972547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:00,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639746611] [2022-01-18 15:30:00,972 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:00,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:00,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:00,972 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:00,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 15:30:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:00,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:00,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:01,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:01,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:30:01,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:01,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:30:01,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:01,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:01,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:01,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 128 [2022-01-18 15:30:01,685 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:01,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 108 [2022-01-18 15:30:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:01,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639746611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:01,875 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:01,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-01-18 15:30:01,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876448167] [2022-01-18 15:30:01,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:01,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:30:01,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:01,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:30:01,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:01,876 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:02,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:02,079 INFO L93 Difference]: Finished difference Result 75 states and 143 transitions. [2022-01-18 15:30:02,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:02,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:02,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:02,079 INFO L225 Difference]: With dead ends: 75 [2022-01-18 15:30:02,079 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:30:02,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:02,080 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:02,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 71 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:02,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:30:02,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2022-01-18 15:30:02,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:02,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2022-01-18 15:30:02,082 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2022-01-18 15:30:02,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:02,082 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2022-01-18 15:30:02,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:02,082 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2022-01-18 15:30:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:02,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:02,083 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:02,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:02,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-01-18 15:30:02,295 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:02,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:02,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1647300433, now seen corresponding path program 14 times [2022-01-18 15:30:02,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:02,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908902154] [2022-01-18 15:30:02,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:02,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:02,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:02,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908902154] [2022-01-18 15:30:02,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908902154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:02,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610264979] [2022-01-18 15:30:02,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:02,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:02,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:02,467 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:02,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 15:30:02,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:02,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:02,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:02,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:02,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:02,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:30:02,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:02,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:30:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:02,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:03,297 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:03,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 120 [2022-01-18 15:30:03,307 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:03,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 100 [2022-01-18 15:30:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:03,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610264979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:03,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:03,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:30:03,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086150696] [2022-01-18 15:30:03,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:03,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:30:03,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:03,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:30:03,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:03,523 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:03,709 INFO L93 Difference]: Finished difference Result 81 states and 151 transitions. [2022-01-18 15:30:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:03,709 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:03,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:03,710 INFO L225 Difference]: With dead ends: 81 [2022-01-18 15:30:03,710 INFO L226 Difference]: Without dead ends: 74 [2022-01-18 15:30:03,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:03,710 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:03,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 80 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 224 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-18 15:30:03,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-18 15:30:03,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 57. [2022-01-18 15:30:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:03,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2022-01-18 15:30:03,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2022-01-18 15:30:03,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:03,712 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2022-01-18 15:30:03,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:03,712 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2022-01-18 15:30:03,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:03,712 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:03,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:03,730 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-18 15:30:03,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:03,924 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:03,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:03,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1662761229, now seen corresponding path program 15 times [2022-01-18 15:30:03,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:03,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422117674] [2022-01-18 15:30:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:03,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:04,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422117674] [2022-01-18 15:30:04,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422117674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:04,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878101037] [2022-01-18 15:30:04,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:04,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:04,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:04,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:04,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 15:30:04,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:04,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:04,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:04,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:04,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:04,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:30:04,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:04,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:30:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:04,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:05,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:05,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 124 [2022-01-18 15:30:05,101 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:05,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2022-01-18 15:30:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:05,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878101037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:05,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:05,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:30:05,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477457421] [2022-01-18 15:30:05,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:05,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:30:05,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:05,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:30:05,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:05,299 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:05,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:05,623 INFO L93 Difference]: Finished difference Result 72 states and 138 transitions. [2022-01-18 15:30:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:05,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:05,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:05,624 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:05,624 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 15:30:05,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:30:05,625 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:05,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 66 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 222 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 15:30:05,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 15:30:05,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2022-01-18 15:30:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2022-01-18 15:30:05,627 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2022-01-18 15:30:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:05,627 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2022-01-18 15:30:05,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2022-01-18 15:30:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:05,628 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:05,628 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:05,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:05,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:05,835 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:05,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:05,835 INFO L85 PathProgramCache]: Analyzing trace with hash 2060751261, now seen corresponding path program 16 times [2022-01-18 15:30:05,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:05,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270160814] [2022-01-18 15:30:05,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:05,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:05,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270160814] [2022-01-18 15:30:05,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270160814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:05,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191739005] [2022-01-18 15:30:05,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:05,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:05,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:05,978 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:05,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 15:30:06,004 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:06,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:06,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:06,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:06,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:06,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:30:06,265 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:06,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:30:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:06,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:06,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:06,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 124 [2022-01-18 15:30:06,831 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:06,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 104 [2022-01-18 15:30:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:06,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191739005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:06,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:06,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 15:30:06,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706451589] [2022-01-18 15:30:06,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:06,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:30:06,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:06,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:30:06,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:06,989 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:07,096 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2022-01-18 15:30:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:07,096 INFO L225 Difference]: With dead ends: 70 [2022-01-18 15:30:07,096 INFO L226 Difference]: Without dead ends: 63 [2022-01-18 15:30:07,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:07,097 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 15 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:07,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 76 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:30:07,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-18 15:30:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2022-01-18 15:30:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:07,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2022-01-18 15:30:07,098 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2022-01-18 15:30:07,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:07,098 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2022-01-18 15:30:07,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2022-01-18 15:30:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:07,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:07,099 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:07,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:07,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:07,299 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:07,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1565901377, now seen corresponding path program 17 times [2022-01-18 15:30:07,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:07,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327856094] [2022-01-18 15:30:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:07,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:07,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327856094] [2022-01-18 15:30:07,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327856094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:07,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458297725] [2022-01-18 15:30:07,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:07,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:07,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:07,487 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:07,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 15:30:07,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:07,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:07,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:07,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:07,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:30:07,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:30:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:07,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:08,295 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:08,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:30:08,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:30:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:08,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458297725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:08,304 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:08,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:30:08,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877216116] [2022-01-18 15:30:08,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:08,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:30:08,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:08,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:30:08,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:08,305 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:08,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:08,678 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2022-01-18 15:30:08,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:08,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:08,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:08,679 INFO L225 Difference]: With dead ends: 103 [2022-01-18 15:30:08,679 INFO L226 Difference]: Without dead ends: 96 [2022-01-18 15:30:08,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:30:08,683 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 44 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:08,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 89 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-18 15:30:08,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2022-01-18 15:30:08,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:08,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2022-01-18 15:30:08,685 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 14 [2022-01-18 15:30:08,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:08,685 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2022-01-18 15:30:08,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:08,685 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2022-01-18 15:30:08,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:08,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:08,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:08,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:08,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-01-18 15:30:08,887 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:08,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:08,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1581362173, now seen corresponding path program 18 times [2022-01-18 15:30:08,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:08,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834414847] [2022-01-18 15:30:08,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:08,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:09,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834414847] [2022-01-18 15:30:09,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834414847] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89295919] [2022-01-18 15:30:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:09,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:09,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:09,245 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:09,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 15:30:09,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:09,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:09,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:09,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:09,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:09,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:30:09,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:09,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:30:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:10,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:10,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:10,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 189 treesize of output 175 [2022-01-18 15:30:10,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:10,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 167 treesize of output 153 [2022-01-18 15:30:11,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:11,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89295919] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:11,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:11,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:30:11,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632177516] [2022-01-18 15:30:11,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:11,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:30:11,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:11,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:30:11,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:30:11,254 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:11,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:11,481 INFO L93 Difference]: Finished difference Result 74 states and 148 transitions. [2022-01-18 15:30:11,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:11,481 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:11,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:11,481 INFO L225 Difference]: With dead ends: 74 [2022-01-18 15:30:11,481 INFO L226 Difference]: Without dead ends: 67 [2022-01-18 15:30:11,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:30:11,482 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:11,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 86 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 169 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-01-18 15:30:11,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-18 15:30:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2022-01-18 15:30:11,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:11,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2022-01-18 15:30:11,483 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 14 [2022-01-18 15:30:11,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:11,483 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2022-01-18 15:30:11,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:11,483 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2022-01-18 15:30:11,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:11,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:11,484 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:11,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:11,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 15:30:11,684 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash 2142150317, now seen corresponding path program 19 times [2022-01-18 15:30:11,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:11,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511812876] [2022-01-18 15:30:11,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:11,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:11,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:11,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:11,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511812876] [2022-01-18 15:30:11,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511812876] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:11,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573639267] [2022-01-18 15:30:11,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:11,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:11,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:11,857 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:11,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 15:30:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:11,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:30:11,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:12,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:12,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:30:12,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:12,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:30:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:12,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:12,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:12,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 118 [2022-01-18 15:30:12,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:12,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-01-18 15:30:13,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:13,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573639267] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:13,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:13,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-01-18 15:30:13,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023531480] [2022-01-18 15:30:13,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:13,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:30:13,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:13,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:30:13,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:13,043 INFO L87 Difference]: Start difference. First operand 56 states and 112 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:13,336 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2022-01-18 15:30:13,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:13,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:13,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:13,336 INFO L225 Difference]: With dead ends: 91 [2022-01-18 15:30:13,336 INFO L226 Difference]: Without dead ends: 84 [2022-01-18 15:30:13,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:30:13,337 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:13,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 76 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 144 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-01-18 15:30:13,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-18 15:30:13,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2022-01-18 15:30:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2022-01-18 15:30:13,338 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 14 [2022-01-18 15:30:13,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:13,338 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2022-01-18 15:30:13,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2022-01-18 15:30:13,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-01-18 15:30:13,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:13,339 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:13,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:13,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-18 15:30:13,551 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:13,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:13,552 INFO L85 PathProgramCache]: Analyzing trace with hash 533835135, now seen corresponding path program 20 times [2022-01-18 15:30:13,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:13,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733177581] [2022-01-18 15:30:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:13,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:13,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:13,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733177581] [2022-01-18 15:30:13,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733177581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:13,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661670905] [2022-01-18 15:30:13,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:13,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:13,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:13,694 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:13,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 15:30:13,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:13,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:13,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:13,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:14,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 107 [2022-01-18 15:30:14,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:14,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 89 [2022-01-18 15:30:14,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:14,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:15,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:15,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 202 treesize of output 184 [2022-01-18 15:30:15,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:15,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 158 [2022-01-18 15:30:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:15,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661670905] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:15,252 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:15,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:30:15,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824471896] [2022-01-18 15:30:15,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:30:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:30:15,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:15,253 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:15,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:15,368 INFO L93 Difference]: Finished difference Result 85 states and 161 transitions. [2022-01-18 15:30:15,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:15,368 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-01-18 15:30:15,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:15,369 INFO L225 Difference]: With dead ends: 85 [2022-01-18 15:30:15,369 INFO L226 Difference]: Without dead ends: 78 [2022-01-18 15:30:15,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:30:15,369 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:15,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 98 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 141 Invalid, 0 Unknown, 112 Unchecked, 0.1s Time] [2022-01-18 15:30:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-18 15:30:15,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2022-01-18 15:30:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0) internal successors, (112), 56 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:15,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2022-01-18 15:30:15,371 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 14 [2022-01-18 15:30:15,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:15,371 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2022-01-18 15:30:15,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:15,371 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2022-01-18 15:30:15,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:15,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:15,371 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:15,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-18 15:30:15,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:15,583 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:15,584 INFO L85 PathProgramCache]: Analyzing trace with hash -116480252, now seen corresponding path program 21 times [2022-01-18 15:30:15,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:15,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959659594] [2022-01-18 15:30:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:15,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:15,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:15,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:15,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959659594] [2022-01-18 15:30:15,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959659594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:15,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840966031] [2022-01-18 15:30:15,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:15,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:15,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:15,654 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:15,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 15:30:15,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:15,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:15,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:15,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:15,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:30:15,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:30:15,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:15,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:15,943 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:15,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:15,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:15,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840966031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:15,953 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:15,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:30:15,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078908357] [2022-01-18 15:30:15,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:15,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:30:15,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:15,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:30:15,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:30:15,954 INFO L87 Difference]: Start difference. First operand 57 states and 112 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:16,094 INFO L93 Difference]: Finished difference Result 85 states and 163 transitions. [2022-01-18 15:30:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:16,094 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:16,095 INFO L225 Difference]: With dead ends: 85 [2022-01-18 15:30:16,095 INFO L226 Difference]: Without dead ends: 85 [2022-01-18 15:30:16,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:16,095 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:16,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 112 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:30:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-18 15:30:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 53. [2022-01-18 15:30:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.0576923076923075) internal successors, (107), 52 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 107 transitions. [2022-01-18 15:30:16,097 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 107 transitions. Word has length 15 [2022-01-18 15:30:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 107 transitions. [2022-01-18 15:30:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 107 transitions. [2022-01-18 15:30:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:16,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:16,103 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:16,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-18 15:30:16,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:16,317 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:16,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:16,318 INFO L85 PathProgramCache]: Analyzing trace with hash 2145599692, now seen corresponding path program 22 times [2022-01-18 15:30:16,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:16,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80537968] [2022-01-18 15:30:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:16,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:16,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80537968] [2022-01-18 15:30:16,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80537968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:16,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36897851] [2022-01-18 15:30:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:16,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:16,388 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:16,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 15:30:16,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:16,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:16,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:16,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:16,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:30:16,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:30:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:16,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:16,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:16,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:16,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:16,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:16,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:16,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36897851] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:16,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:16,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:30:16,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923677867] [2022-01-18 15:30:16,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:16,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:30:16,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:16,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:30:16,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:30:16,690 INFO L87 Difference]: Start difference. First operand 53 states and 107 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:16,792 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2022-01-18 15:30:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:16,793 INFO L225 Difference]: With dead ends: 110 [2022-01-18 15:30:16,793 INFO L226 Difference]: Without dead ends: 99 [2022-01-18 15:30:16,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:16,793 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:16,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 101 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-18 15:30:16,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-18 15:30:16,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 54. [2022-01-18 15:30:16,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2022-01-18 15:30:16,796 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 15 [2022-01-18 15:30:16,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:16,796 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2022-01-18 15:30:16,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:16,796 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2022-01-18 15:30:16,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:16,796 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:16,796 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:16,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-18 15:30:17,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-01-18 15:30:17,011 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:17,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1875090000, now seen corresponding path program 23 times [2022-01-18 15:30:17,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:17,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063828631] [2022-01-18 15:30:17,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:17,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:17,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:17,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063828631] [2022-01-18 15:30:17,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063828631] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:17,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556559288] [2022-01-18 15:30:17,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:17,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:17,086 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:17,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 15:30:17,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:17,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:17,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:17,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:30:17,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:30:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:17,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:17,324 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:17,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:30:17,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:30:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:17,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556559288] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:17,338 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:17,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:17,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368923687] [2022-01-18 15:30:17,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:17,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:17,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:17,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:17,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:17,339 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:17,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:17,499 INFO L93 Difference]: Finished difference Result 86 states and 160 transitions. [2022-01-18 15:30:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:17,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:17,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:17,504 INFO L225 Difference]: With dead ends: 86 [2022-01-18 15:30:17,504 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 15:30:17,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:17,504 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:17,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:17,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 15:30:17,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 53. [2022-01-18 15:30:17,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2022-01-18 15:30:17,506 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 15 [2022-01-18 15:30:17,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:17,506 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2022-01-18 15:30:17,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:17,506 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2022-01-18 15:30:17,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:17,506 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:17,506 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:17,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:17,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-01-18 15:30:17,722 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:17,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:17,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1910155050, now seen corresponding path program 24 times [2022-01-18 15:30:17,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405851195] [2022-01-18 15:30:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:17,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:17,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:17,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405851195] [2022-01-18 15:30:17,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405851195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:17,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424182131] [2022-01-18 15:30:17,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:17,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:17,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:17,807 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:17,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 15:30:17,828 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:17,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:17,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:17,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:17,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:17,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:17,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:17,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:17,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:17,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:18,131 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:18,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:18,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:18,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:18,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424182131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:18,144 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:18,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:18,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380907351] [2022-01-18 15:30:18,144 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:18,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:18,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:18,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:18,145 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:18,169 INFO L93 Difference]: Finished difference Result 68 states and 141 transitions. [2022-01-18 15:30:18,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:18,169 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:18,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:18,170 INFO L225 Difference]: With dead ends: 68 [2022-01-18 15:30:18,170 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:30:18,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:18,170 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:18,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 35 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 11 Unchecked, 0.0s Time] [2022-01-18 15:30:18,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:30:18,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2022-01-18 15:30:18,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 122 transitions. [2022-01-18 15:30:18,172 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 122 transitions. Word has length 15 [2022-01-18 15:30:18,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:18,172 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 122 transitions. [2022-01-18 15:30:18,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,172 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 122 transitions. [2022-01-18 15:30:18,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:18,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:18,172 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:18,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:18,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:18,387 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:18,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:18,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1737665160, now seen corresponding path program 25 times [2022-01-18 15:30:18,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:18,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37203735] [2022-01-18 15:30:18,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:18,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:18,457 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:18,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:18,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37203735] [2022-01-18 15:30:18,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37203735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:18,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754881995] [2022-01-18 15:30:18,458 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:18,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:18,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:18,458 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:18,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 15:30:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:18,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:18,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:18,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:18,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:18,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:18,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:18,652 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:18,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:18,782 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:18,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:18,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754881995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:18,792 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:18,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:18,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133991607] [2022-01-18 15:30:18,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:18,793 INFO L87 Difference]: Start difference. First operand 60 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:18,825 INFO L93 Difference]: Finished difference Result 70 states and 143 transitions. [2022-01-18 15:30:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:18,826 INFO L225 Difference]: With dead ends: 70 [2022-01-18 15:30:18,826 INFO L226 Difference]: Without dead ends: 70 [2022-01-18 15:30:18,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:18,826 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:18,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 52 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-01-18 15:30:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-01-18 15:30:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 58. [2022-01-18 15:30:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0701754385964914) internal successors, (118), 57 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 118 transitions. [2022-01-18 15:30:18,828 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 118 transitions. Word has length 15 [2022-01-18 15:30:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:18,828 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 118 transitions. [2022-01-18 15:30:18,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 118 transitions. [2022-01-18 15:30:18,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:18,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:18,828 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:18,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-18 15:30:19,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:19,039 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:19,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:19,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1738259806, now seen corresponding path program 26 times [2022-01-18 15:30:19,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:19,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491406922] [2022-01-18 15:30:19,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:19,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:19,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491406922] [2022-01-18 15:30:19,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491406922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:19,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500280223] [2022-01-18 15:30:19,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:19,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:19,119 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:19,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 15:30:19,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:19,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:19,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:19,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:19,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:19,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:19,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:19,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:19,446 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:19,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:19,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:19,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:19,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500280223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:19,467 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:19,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:19,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894462291] [2022-01-18 15:30:19,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:19,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:19,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:19,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:19,468 INFO L87 Difference]: Start difference. First operand 58 states and 118 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:19,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:19,489 INFO L93 Difference]: Finished difference Result 77 states and 158 transitions. [2022-01-18 15:30:19,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:19,489 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:19,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:19,489 INFO L225 Difference]: With dead ends: 77 [2022-01-18 15:30:19,489 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 15:30:19,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:19,490 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:19,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 47 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 52 Unchecked, 0.0s Time] [2022-01-18 15:30:19,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 15:30:19,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2022-01-18 15:30:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 53 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 108 transitions. [2022-01-18 15:30:19,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 108 transitions. Word has length 15 [2022-01-18 15:30:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:19,491 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 108 transitions. [2022-01-18 15:30:19,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 108 transitions. [2022-01-18 15:30:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:19,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:19,492 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:19,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 15:30:19,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:19,692 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:19,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:19,692 INFO L85 PathProgramCache]: Analyzing trace with hash 823010828, now seen corresponding path program 27 times [2022-01-18 15:30:19,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:19,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006214656] [2022-01-18 15:30:19,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:19,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:19,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:19,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006214656] [2022-01-18 15:30:19,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006214656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:19,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620822505] [2022-01-18 15:30:19,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:19,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:19,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:19,763 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:19,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 15:30:19,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:19,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:20,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:20,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:30:20,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:20,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:30:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:20,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:20,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:20,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:20,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:20,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:20,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620822505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:20,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:20,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:20,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722189503] [2022-01-18 15:30:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:20,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:20,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:20,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:20,195 INFO L87 Difference]: Start difference. First operand 54 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:20,284 INFO L93 Difference]: Finished difference Result 78 states and 146 transitions. [2022-01-18 15:30:20,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:20,284 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:20,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:20,284 INFO L225 Difference]: With dead ends: 78 [2022-01-18 15:30:20,285 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:30:20,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:20,285 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:20,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 56 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 102 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-01-18 15:30:20,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:30:20,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2022-01-18 15:30:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2022-01-18 15:30:20,286 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2022-01-18 15:30:20,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:20,286 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2022-01-18 15:30:20,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,286 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2022-01-18 15:30:20,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:20,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:20,287 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:20,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:20,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-01-18 15:30:20,500 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash 286280582, now seen corresponding path program 28 times [2022-01-18 15:30:20,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:20,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748667829] [2022-01-18 15:30:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:20,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:20,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748667829] [2022-01-18 15:30:20,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748667829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:20,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063112035] [2022-01-18 15:30:20,564 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:20,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:20,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:20,565 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:20,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 15:30:20,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:20,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:20,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:20,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:20,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:20,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:20,843 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:20,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:20,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:20,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063112035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:20,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:20,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:20,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268454256] [2022-01-18 15:30:20,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:20,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:20,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:20,854 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:20,941 INFO L93 Difference]: Finished difference Result 93 states and 182 transitions. [2022-01-18 15:30:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:20,941 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:20,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:20,942 INFO L225 Difference]: With dead ends: 93 [2022-01-18 15:30:20,942 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 15:30:20,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:20,942 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:20,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 86 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 105 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-01-18 15:30:20,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 15:30:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 55. [2022-01-18 15:30:20,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0555555555555554) internal successors, (111), 54 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 111 transitions. [2022-01-18 15:30:20,944 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 111 transitions. Word has length 15 [2022-01-18 15:30:20,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:20,944 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 111 transitions. [2022-01-18 15:30:20,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:20,944 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 111 transitions. [2022-01-18 15:30:20,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:20,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:20,944 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:20,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:21,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-18 15:30:21,153 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1205731216, now seen corresponding path program 29 times [2022-01-18 15:30:21,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:21,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950406786] [2022-01-18 15:30:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:21,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:21,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:21,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:21,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950406786] [2022-01-18 15:30:21,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950406786] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:21,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298300328] [2022-01-18 15:30:21,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:21,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:21,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:21,223 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:21,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 15:30:21,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:21,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:21,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:21,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:21,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:21,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:21,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:21,483 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:21,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:30:21,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:30:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:21,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298300328] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:21,495 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:21,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 15:30:21,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603964414] [2022-01-18 15:30:21,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 15:30:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:21,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 15:30:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:21,496 INFO L87 Difference]: Start difference. First operand 55 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:21,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:21,840 INFO L93 Difference]: Finished difference Result 105 states and 194 transitions. [2022-01-18 15:30:21,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:30:21,840 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:21,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:21,841 INFO L225 Difference]: With dead ends: 105 [2022-01-18 15:30:21,841 INFO L226 Difference]: Without dead ends: 102 [2022-01-18 15:30:21,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:30:21,841 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:21,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 79 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:21,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-18 15:30:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2022-01-18 15:30:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2022-01-18 15:30:21,843 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2022-01-18 15:30:21,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:21,843 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2022-01-18 15:30:21,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:21,843 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2022-01-18 15:30:21,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:21,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:21,843 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:21,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-01-18 15:30:22,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 15:30:22,055 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:22,056 INFO L85 PathProgramCache]: Analyzing trace with hash -300635020, now seen corresponding path program 30 times [2022-01-18 15:30:22,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:22,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547131446] [2022-01-18 15:30:22,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:22,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:22,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:22,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547131446] [2022-01-18 15:30:22,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547131446] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:22,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481948827] [2022-01-18 15:30:22,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:22,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:22,126 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:22,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 15:30:22,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:30:22,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:22,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:22,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:22,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:22,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:22,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:22,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:22,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:22,411 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:22,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:22,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:22,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481948827] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:22,421 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:22,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 15:30:22,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009457745] [2022-01-18 15:30:22,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:22,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 15:30:22,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 15:30:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:22,422 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:22,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:22,521 INFO L93 Difference]: Finished difference Result 71 states and 144 transitions. [2022-01-18 15:30:22,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:22,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:22,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:22,522 INFO L225 Difference]: With dead ends: 71 [2022-01-18 15:30:22,522 INFO L226 Difference]: Without dead ends: 69 [2022-01-18 15:30:22,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:22,522 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:22,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 57 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 143 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:30:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-18 15:30:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-01-18 15:30:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:22,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2022-01-18 15:30:22,526 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2022-01-18 15:30:22,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:22,526 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2022-01-18 15:30:22,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2022-01-18 15:30:22,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:22,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:22,527 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:22,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-18 15:30:22,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-01-18 15:30:22,731 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:22,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1968511604, now seen corresponding path program 31 times [2022-01-18 15:30:22,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:22,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958442707] [2022-01-18 15:30:22,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:22,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:22,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:22,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958442707] [2022-01-18 15:30:22,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958442707] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:22,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322263276] [2022-01-18 15:30:22,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:22,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:22,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:22,794 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:22,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 15:30:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:22,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:22,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:22,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:22,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:22,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:22,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:23,041 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:23,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:23,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:23,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:23,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:23,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322263276] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:23,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:23,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:23,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326757437] [2022-01-18 15:30:23,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:23,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:23,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:23,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:23,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:23,092 INFO L87 Difference]: Start difference. First operand 59 states and 118 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:23,217 INFO L93 Difference]: Finished difference Result 88 states and 169 transitions. [2022-01-18 15:30:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:23,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:23,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:23,218 INFO L225 Difference]: With dead ends: 88 [2022-01-18 15:30:23,218 INFO L226 Difference]: Without dead ends: 88 [2022-01-18 15:30:23,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:23,218 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:23,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 98 Invalid, 0 Unknown, 110 Unchecked, 0.0s Time] [2022-01-18 15:30:23,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-18 15:30:23,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2022-01-18 15:30:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2022-01-18 15:30:23,220 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 15 [2022-01-18 15:30:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:23,220 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2022-01-18 15:30:23,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2022-01-18 15:30:23,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:23,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:23,220 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:23,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:23,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:23,435 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:23,436 INFO L85 PathProgramCache]: Analyzing trace with hash -356910076, now seen corresponding path program 32 times [2022-01-18 15:30:23,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:23,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71826918] [2022-01-18 15:30:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:23,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:23,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:23,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71826918] [2022-01-18 15:30:23,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71826918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:23,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249595823] [2022-01-18 15:30:23,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:23,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:23,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:23,505 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:23,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 15:30:23,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:23,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:23,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:23,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:23,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:23,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:23,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:23,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:23,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:23,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:23,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:23,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:23,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:23,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:23,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249595823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:23,857 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:23,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:23,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95199399] [2022-01-18 15:30:23,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:23,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:23,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:23,857 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:23,900 INFO L93 Difference]: Finished difference Result 66 states and 134 transitions. [2022-01-18 15:30:23,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:23,900 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:23,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:23,900 INFO L225 Difference]: With dead ends: 66 [2022-01-18 15:30:23,901 INFO L226 Difference]: Without dead ends: 66 [2022-01-18 15:30:23,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:23,901 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:23,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-01-18 15:30:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-18 15:30:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2022-01-18 15:30:23,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2022-01-18 15:30:23,902 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2022-01-18 15:30:23,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:23,902 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2022-01-18 15:30:23,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:23,902 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2022-01-18 15:30:23,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:23,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:23,903 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:23,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:24,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-01-18 15:30:24,107 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:24,107 INFO L85 PathProgramCache]: Analyzing trace with hash -184420186, now seen corresponding path program 33 times [2022-01-18 15:30:24,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:24,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592751201] [2022-01-18 15:30:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:24,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:24,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:24,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592751201] [2022-01-18 15:30:24,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592751201] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:24,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140778692] [2022-01-18 15:30:24,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:24,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:24,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:24,178 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:24,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 15:30:24,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:24,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:24,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:24,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:24,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:24,342 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:24,342 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:24,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:24,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:24,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:24,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:24,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140778692] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:24,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:24,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:24,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758511244] [2022-01-18 15:30:24,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:24,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:24,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:24,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:24,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:24,490 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:24,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:24,554 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2022-01-18 15:30:24,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:24,554 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:24,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:24,555 INFO L225 Difference]: With dead ends: 71 [2022-01-18 15:30:24,555 INFO L226 Difference]: Without dead ends: 71 [2022-01-18 15:30:24,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:24,555 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:24,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 45 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-01-18 15:30:24,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-18 15:30:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2022-01-18 15:30:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:24,556 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:24,557 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:24,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:24,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:24,557 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:24,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:24,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:24,775 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:24,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:24,775 INFO L85 PathProgramCache]: Analyzing trace with hash -185014832, now seen corresponding path program 34 times [2022-01-18 15:30:24,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:24,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388110717] [2022-01-18 15:30:24,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:24,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:24,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:24,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388110717] [2022-01-18 15:30:24,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388110717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:24,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430987135] [2022-01-18 15:30:24,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:24,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:24,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:24,849 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:24,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 15:30:24,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:24,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:24,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:25,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:25,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:25,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:25,166 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:25,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:25,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:25,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:25,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430987135] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:25,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:25,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:25,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954838971] [2022-01-18 15:30:25,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:25,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:25,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:25,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:25,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:25,226 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:25,274 INFO L93 Difference]: Finished difference Result 68 states and 136 transitions. [2022-01-18 15:30:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:25,274 INFO L225 Difference]: With dead ends: 68 [2022-01-18 15:30:25,274 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:30:25,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:25,279 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 8 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:25,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 40 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2022-01-18 15:30:25,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:30:25,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-01-18 15:30:25,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 58 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2022-01-18 15:30:25,280 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 15 [2022-01-18 15:30:25,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:25,280 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2022-01-18 15:30:25,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2022-01-18 15:30:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:25,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:25,281 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:25,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:25,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:25,481 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash 763814400, now seen corresponding path program 35 times [2022-01-18 15:30:25,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:25,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149991748] [2022-01-18 15:30:25,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:25,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:25,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:25,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149991748] [2022-01-18 15:30:25,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149991748] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:25,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686329762] [2022-01-18 15:30:25,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:25,547 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:25,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:25,548 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:25,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 15:30:25,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:25,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:25,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:25,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:25,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:25,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:25,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:25,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:25,822 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:25,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:30:25,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:30:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:25,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686329762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:25,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:25,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 15:30:25,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703352309] [2022-01-18 15:30:25,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:25,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:30:25,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:30:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:25,842 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:25,924 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2022-01-18 15:30:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:25,924 INFO L225 Difference]: With dead ends: 71 [2022-01-18 15:30:25,924 INFO L226 Difference]: Without dead ends: 71 [2022-01-18 15:30:25,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:25,925 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:25,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 48 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-01-18 15:30:25,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-18 15:30:25,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 59. [2022-01-18 15:30:25,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0689655172413794) internal successors, (120), 58 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 120 transitions. [2022-01-18 15:30:25,926 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 120 transitions. Word has length 15 [2022-01-18 15:30:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:25,926 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 120 transitions. [2022-01-18 15:30:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 120 transitions. [2022-01-18 15:30:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:25,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:25,926 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:25,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-18 15:30:26,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 15:30:26,135 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:26,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:26,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1918711494, now seen corresponding path program 36 times [2022-01-18 15:30:26,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:26,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361007026] [2022-01-18 15:30:26,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:26,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:26,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361007026] [2022-01-18 15:30:26,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361007026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:26,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208873649] [2022-01-18 15:30:26,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:26,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:26,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:26,201 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:26,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 15:30:26,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:26,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:26,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:26,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:26,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:30:26,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:26,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:30:26,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:26,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:26,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:26,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:26,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:26,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:26,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:26,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208873649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:26,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:26,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:26,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305776940] [2022-01-18 15:30:26,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:26,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:26,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:26,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:26,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:26,564 INFO L87 Difference]: Start difference. First operand 59 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:26,661 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2022-01-18 15:30:26,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:26,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:26,661 INFO L225 Difference]: With dead ends: 71 [2022-01-18 15:30:26,661 INFO L226 Difference]: Without dead ends: 65 [2022-01-18 15:30:26,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:26,662 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:26,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 95 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-01-18 15:30:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-18 15:30:26,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-01-18 15:30:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2022-01-18 15:30:26,663 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2022-01-18 15:30:26,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:26,663 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2022-01-18 15:30:26,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:26,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2022-01-18 15:30:26,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:26,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:26,663 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:26,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:26,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-01-18 15:30:26,875 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:26,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1839525556, now seen corresponding path program 37 times [2022-01-18 15:30:26,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:26,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954622651] [2022-01-18 15:30:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:26,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:26,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954622651] [2022-01-18 15:30:26,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954622651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:26,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053523192] [2022-01-18 15:30:26,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:26,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:26,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:26,939 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:26,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 15:30:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:27,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:27,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:27,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:27,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:27,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:27,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:27,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:27,202 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:27,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:27,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053523192] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:27,241 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:27,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:27,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473170924] [2022-01-18 15:30:27,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:27,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:27,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:27,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:27,242 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:27,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:27,336 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2022-01-18 15:30:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:27,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:27,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:27,337 INFO L225 Difference]: With dead ends: 90 [2022-01-18 15:30:27,337 INFO L226 Difference]: Without dead ends: 90 [2022-01-18 15:30:27,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:27,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:27,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 95 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 173 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-18 15:30:27,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-18 15:30:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2022-01-18 15:30:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0847457627118646) internal successors, (123), 59 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 123 transitions. [2022-01-18 15:30:27,339 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 123 transitions. Word has length 15 [2022-01-18 15:30:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:27,339 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 123 transitions. [2022-01-18 15:30:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 123 transitions. [2022-01-18 15:30:27,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:27,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:27,339 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:27,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 15:30:27,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-01-18 15:30:27,551 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:27,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1535991106, now seen corresponding path program 38 times [2022-01-18 15:30:27,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:27,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007697438] [2022-01-18 15:30:27,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:27,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:27,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007697438] [2022-01-18 15:30:27,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007697438] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:27,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319643269] [2022-01-18 15:30:27,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:27,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:27,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:27,613 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:27,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 15:30:27,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:27,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:27,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:27,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:27,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:27,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:27,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:27,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:27,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:27,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:27,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:27,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:27,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:27,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:27,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319643269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:27,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:27,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:27,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088312528] [2022-01-18 15:30:27,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:27,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:27,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:27,936 INFO L87 Difference]: Start difference. First operand 60 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:28,160 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2022-01-18 15:30:28,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:30:28,161 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:28,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:28,161 INFO L225 Difference]: With dead ends: 89 [2022-01-18 15:30:28,161 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 15:30:28,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:30:28,161 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:28,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 66 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 166 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-01-18 15:30:28,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 15:30:28,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2022-01-18 15:30:28,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0793650793650795) internal successors, (131), 63 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2022-01-18 15:30:28,163 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2022-01-18 15:30:28,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:28,163 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2022-01-18 15:30:28,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,163 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2022-01-18 15:30:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:28,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:28,163 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:28,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 15:30:28,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-18 15:30:28,380 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:28,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:28,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1252609954, now seen corresponding path program 39 times [2022-01-18 15:30:28,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:28,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293161921] [2022-01-18 15:30:28,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:28,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:28,441 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:28,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293161921] [2022-01-18 15:30:28,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293161921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:28,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144103824] [2022-01-18 15:30:28,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:28,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:28,443 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:28,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 15:30:28,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:30:28,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:28,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:28,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:28,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:28,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:28,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:28,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:28,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:28,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:28,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:28,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:28,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144103824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:28,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:28,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:28,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172788082] [2022-01-18 15:30:28,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:28,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:28,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:28,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:28,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:28,736 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:28,798 INFO L93 Difference]: Finished difference Result 69 states and 138 transitions. [2022-01-18 15:30:28,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:28,799 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:28,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:28,799 INFO L225 Difference]: With dead ends: 69 [2022-01-18 15:30:28,799 INFO L226 Difference]: Without dead ends: 67 [2022-01-18 15:30:28,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:28,799 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:28,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 27 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 12 Unchecked, 0.0s Time] [2022-01-18 15:30:28,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-18 15:30:28,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-01-18 15:30:28,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 63 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 130 transitions. [2022-01-18 15:30:28,801 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 130 transitions. Word has length 15 [2022-01-18 15:30:28,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:28,801 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 130 transitions. [2022-01-18 15:30:28,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:28,801 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 130 transitions. [2022-01-18 15:30:28,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:28,801 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:28,802 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:28,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:29,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:29,023 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:29,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -415266630, now seen corresponding path program 40 times [2022-01-18 15:30:29,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:29,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721800161] [2022-01-18 15:30:29,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:29,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721800161] [2022-01-18 15:30:29,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721800161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:29,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827421140] [2022-01-18 15:30:29,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:29,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:29,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:29,091 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:29,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 15:30:29,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:29,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:29,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:29,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:29,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:29,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:29,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:29,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:29,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:29,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:29,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:29,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827421140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:29,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:29,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:29,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595214290] [2022-01-18 15:30:29,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:29,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:29,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:29,389 INFO L87 Difference]: Start difference. First operand 64 states and 130 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:29,488 INFO L93 Difference]: Finished difference Result 72 states and 145 transitions. [2022-01-18 15:30:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:29,489 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:29,489 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:30:29,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:29,489 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:29,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 32 Unchecked, 0.0s Time] [2022-01-18 15:30:29,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:30:29,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 59. [2022-01-18 15:30:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0517241379310347) internal successors, (119), 58 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:29,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2022-01-18 15:30:29,490 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2022-01-18 15:30:29,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2022-01-18 15:30:29,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2022-01-18 15:30:29,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:29,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:29,491 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:29,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-18 15:30:29,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-01-18 15:30:29,703 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:29,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 826833024, now seen corresponding path program 41 times [2022-01-18 15:30:29,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:29,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667082087] [2022-01-18 15:30:29,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:29,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667082087] [2022-01-18 15:30:29,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667082087] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976995691] [2022-01-18 15:30:29,755 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:29,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:29,756 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 15:30:29,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:29,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:29,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:29,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:29,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:29,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:30:29,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:29,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:30:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:29,961 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:29,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:30:29,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:30:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:29,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976995691] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:29,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:29,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-18 15:30:29,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391583258] [2022-01-18 15:30:29,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:29,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-18 15:30:29,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:29,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-18 15:30:29,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:29,990 INFO L87 Difference]: Start difference. First operand 59 states and 119 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:30,097 INFO L93 Difference]: Finished difference Result 93 states and 179 transitions. [2022-01-18 15:30:30,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:30,097 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:30,097 INFO L225 Difference]: With dead ends: 93 [2022-01-18 15:30:30,097 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 15:30:30,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:30,098 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:30,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:30,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 15:30:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2022-01-18 15:30:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.1) internal successors, (126), 60 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 126 transitions. [2022-01-18 15:30:30,099 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 126 transitions. Word has length 15 [2022-01-18 15:30:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:30,099 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 126 transitions. [2022-01-18 15:30:30,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 126 transitions. [2022-01-18 15:30:30,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:30,099 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:30,099 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:30,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:30,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:30,300 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:30,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:30,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1746283658, now seen corresponding path program 42 times [2022-01-18 15:30:30,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:30,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120076266] [2022-01-18 15:30:30,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:30,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:30,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:30,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120076266] [2022-01-18 15:30:30,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120076266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632195950] [2022-01-18 15:30:30,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:30,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:30,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:30,360 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:30,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 15:30:30,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:30:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:30,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:30,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:30,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:30,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:30,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:30,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:30,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:30,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:30,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:30,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:30,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632195950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:30,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:30,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:30,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970568662] [2022-01-18 15:30:30,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:30,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:30,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:30,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:30,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:30,610 INFO L87 Difference]: Start difference. First operand 61 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:30,709 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2022-01-18 15:30:30,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:30,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:30,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:30,709 INFO L225 Difference]: With dead ends: 89 [2022-01-18 15:30:30,709 INFO L226 Difference]: Without dead ends: 86 [2022-01-18 15:30:30,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:30,710 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:30,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 47 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:30,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-18 15:30:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 66. [2022-01-18 15:30:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.1076923076923078) internal successors, (137), 65 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 137 transitions. [2022-01-18 15:30:30,711 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 137 transitions. Word has length 15 [2022-01-18 15:30:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:30,711 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 137 transitions. [2022-01-18 15:30:30,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:30,711 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 137 transitions. [2022-01-18 15:30:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:30,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:30,711 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:30,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:30,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-01-18 15:30:30,927 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:30,927 INFO L85 PathProgramCache]: Analyzing trace with hash 239917422, now seen corresponding path program 43 times [2022-01-18 15:30:30,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:30,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274724556] [2022-01-18 15:30:30,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:30,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:30,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:30,996 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274724556] [2022-01-18 15:30:30,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274724556] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:30,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466639010] [2022-01-18 15:30:30,996 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:30,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:30,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:30,997 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:30,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 15:30:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:31,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:31,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:30:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:31,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:30:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:31,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:31,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:31,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:31,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:31,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:31,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:31,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466639010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:31,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:31,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:31,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411622898] [2022-01-18 15:30:31,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:31,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:31,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:31,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:31,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:31,277 INFO L87 Difference]: Start difference. First operand 66 states and 137 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:31,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:31,403 INFO L93 Difference]: Finished difference Result 93 states and 178 transitions. [2022-01-18 15:30:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:31,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:31,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:31,404 INFO L225 Difference]: With dead ends: 93 [2022-01-18 15:30:31,404 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 15:30:31,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:31,404 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:31,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 74 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:31,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 15:30:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2022-01-18 15:30:31,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:31,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 136 transitions. [2022-01-18 15:30:31,406 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 136 transitions. Word has length 15 [2022-01-18 15:30:31,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:31,406 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 136 transitions. [2022-01-18 15:30:31,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:31,406 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 136 transitions. [2022-01-18 15:30:31,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:31,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:31,406 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:31,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:31,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:31,621 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:31,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:31,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1427959162, now seen corresponding path program 44 times [2022-01-18 15:30:31,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:31,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577463920] [2022-01-18 15:30:31,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:31,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:31,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577463920] [2022-01-18 15:30:31,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577463920] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:31,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73166210] [2022-01-18 15:30:31,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:31,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:31,688 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:31,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 15:30:31,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:31,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:31,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:31,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:31,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:31,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:31,919 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:31,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:31,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:31,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:31,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:31,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73166210] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:31,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:31,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:31,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628720174] [2022-01-18 15:30:31,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:31,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:31,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:31,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:31,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:31,956 INFO L87 Difference]: Start difference. First operand 66 states and 136 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:32,062 INFO L93 Difference]: Finished difference Result 89 states and 172 transitions. [2022-01-18 15:30:32,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:32,062 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:32,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:32,063 INFO L225 Difference]: With dead ends: 89 [2022-01-18 15:30:32,063 INFO L226 Difference]: Without dead ends: 89 [2022-01-18 15:30:32,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:32,063 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:32,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 65 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:32,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-18 15:30:32,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2022-01-18 15:30:32,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.09375) internal successors, (134), 64 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 134 transitions. [2022-01-18 15:30:32,064 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 134 transitions. Word has length 15 [2022-01-18 15:30:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:32,064 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 134 transitions. [2022-01-18 15:30:32,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 134 transitions. [2022-01-18 15:30:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:32,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:32,065 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:32,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:32,280 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash -295312380, now seen corresponding path program 45 times [2022-01-18 15:30:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444490972] [2022-01-18 15:30:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:32,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444490972] [2022-01-18 15:30:32,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444490972] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:32,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705854216] [2022-01-18 15:30:32,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:32,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:32,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:32,336 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 15:30:32,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:32,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:32,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:32,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:32,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-01-18 15:30:32,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:32,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-01-18 15:30:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:32,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:32,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:32,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:32,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:32,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:32,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705854216] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:32,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:32,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:32,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143050139] [2022-01-18 15:30:32,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:32,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:32,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:32,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:32,621 INFO L87 Difference]: Start difference. First operand 65 states and 134 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:32,702 INFO L93 Difference]: Finished difference Result 72 states and 144 transitions. [2022-01-18 15:30:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:32,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:32,703 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:32,703 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:30:32,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:32,708 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:32,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:32,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:30:32,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 65. [2022-01-18 15:30:32,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.078125) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 133 transitions. [2022-01-18 15:30:32,709 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 133 transitions. Word has length 15 [2022-01-18 15:30:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 133 transitions. [2022-01-18 15:30:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 133 transitions. [2022-01-18 15:30:32,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:32,709 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:32,709 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:32,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:32,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 15:30:32,910 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:32,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:32,910 INFO L85 PathProgramCache]: Analyzing trace with hash -352248006, now seen corresponding path program 46 times [2022-01-18 15:30:32,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:32,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039816955] [2022-01-18 15:30:32,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:32,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:32,972 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:32,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039816955] [2022-01-18 15:30:32,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039816955] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:32,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583106885] [2022-01-18 15:30:32,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:32,972 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:32,973 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:32,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 15:30:32,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:32,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:32,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:33,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:33,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:33,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:33,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:33,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:33,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:33,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:33,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:33,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:33,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583106885] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:33,230 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:33,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:33,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845357536] [2022-01-18 15:30:33,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:33,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:33,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:33,231 INFO L87 Difference]: Start difference. First operand 65 states and 133 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:33,333 INFO L93 Difference]: Finished difference Result 72 states and 145 transitions. [2022-01-18 15:30:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:33,333 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:33,333 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:33,333 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:30:33,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:33,334 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:33,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 35 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:30:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-01-18 15:30:33,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:33,335 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:33,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:33,335 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:33,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,335 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:33,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:33,335 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:33,335 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:33,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:33,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-01-18 15:30:33,536 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:33,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:33,536 INFO L85 PathProgramCache]: Analyzing trace with hash -720238826, now seen corresponding path program 47 times [2022-01-18 15:30:33,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:33,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946911259] [2022-01-18 15:30:33,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:33,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:33,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946911259] [2022-01-18 15:30:33,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946911259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:33,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909227448] [2022-01-18 15:30:33,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:33,610 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:33,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:33,610 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:33,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 15:30:33,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:33,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:33,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:33,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:33,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:33,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:33,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:30:33,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:30:33,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:33,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909227448] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:33,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:33,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-01-18 15:30:33,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026839530] [2022-01-18 15:30:33,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:33,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:30:33,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:33,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:30:33,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:33,841 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:33,959 INFO L93 Difference]: Finished difference Result 76 states and 153 transitions. [2022-01-18 15:30:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:33,959 INFO L225 Difference]: With dead ends: 76 [2022-01-18 15:30:33,959 INFO L226 Difference]: Without dead ends: 76 [2022-01-18 15:30:33,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:30:33,960 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:33,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:33,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-18 15:30:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 61. [2022-01-18 15:30:33,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:33,961 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:33,961 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:33,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:33,961 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:33,961 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:33,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:34,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-01-18 15:30:34,175 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:34,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:34,175 INFO L85 PathProgramCache]: Analyzing trace with hash 2012927052, now seen corresponding path program 48 times [2022-01-18 15:30:34,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:34,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652278199] [2022-01-18 15:30:34,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:34,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:34,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:34,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:34,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652278199] [2022-01-18 15:30:34,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652278199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:34,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062671644] [2022-01-18 15:30:34,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:34,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:34,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:34,235 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:34,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 15:30:34,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:34,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:34,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:30:34,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:34,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:30:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:34,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:34,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:34,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:34,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:34,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062671644] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:34,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:34,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977613712] [2022-01-18 15:30:34,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:34,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:34,543 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:34,646 INFO L93 Difference]: Finished difference Result 74 states and 145 transitions. [2022-01-18 15:30:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:34,646 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:34,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:34,647 INFO L225 Difference]: With dead ends: 74 [2022-01-18 15:30:34,647 INFO L226 Difference]: Without dead ends: 68 [2022-01-18 15:30:34,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:34,647 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 56 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:34,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-18 15:30:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2022-01-18 15:30:34,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:34,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2022-01-18 15:30:34,648 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2022-01-18 15:30:34,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:34,648 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2022-01-18 15:30:34,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:34,648 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2022-01-18 15:30:34,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:34,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:34,649 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:34,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-01-18 15:30:34,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 15:30:34,849 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1476196806, now seen corresponding path program 49 times [2022-01-18 15:30:34,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809089429] [2022-01-18 15:30:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:34,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:34,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:34,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809089429] [2022-01-18 15:30:34,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809089429] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:34,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843678450] [2022-01-18 15:30:34,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:34,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:34,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:34,907 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:34,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 15:30:34,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:34,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:34,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:34,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:34,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:34,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:34,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:35,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:35,132 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:35,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:35,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:35,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:35,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:35,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843678450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:35,165 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:35,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:35,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798957612] [2022-01-18 15:30:35,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:35,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:35,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:35,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:35,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:35,166 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:35,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:35,264 INFO L93 Difference]: Finished difference Result 95 states and 185 transitions. [2022-01-18 15:30:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:35,265 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:35,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:35,265 INFO L225 Difference]: With dead ends: 95 [2022-01-18 15:30:35,265 INFO L226 Difference]: Without dead ends: 95 [2022-01-18 15:30:35,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:35,265 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:35,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 63 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:35,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-18 15:30:35,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 62. [2022-01-18 15:30:35,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:35,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 127 transitions. [2022-01-18 15:30:35,267 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 127 transitions. Word has length 15 [2022-01-18 15:30:35,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:35,267 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 127 transitions. [2022-01-18 15:30:35,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:35,267 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 127 transitions. [2022-01-18 15:30:35,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:35,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:35,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:35,282 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 15:30:35,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-18 15:30:35,475 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:35,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:35,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1899319856, now seen corresponding path program 50 times [2022-01-18 15:30:35,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:35,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119764458] [2022-01-18 15:30:35,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:35,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:35,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119764458] [2022-01-18 15:30:35,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119764458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:35,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377487108] [2022-01-18 15:30:35,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:35,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:35,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:35,538 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:35,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 15:30:35,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:35,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:35,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:35,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:30:35,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:35,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:30:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:35,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:35,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:35,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:35,785 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:35,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:35,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377487108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:35,849 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:35,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:35,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640386088] [2022-01-18 15:30:35,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:35,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:35,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:35,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:35,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:35,849 INFO L87 Difference]: Start difference. First operand 62 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:36,016 INFO L93 Difference]: Finished difference Result 92 states and 176 transitions. [2022-01-18 15:30:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:30:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:36,017 INFO L225 Difference]: With dead ends: 92 [2022-01-18 15:30:36,017 INFO L226 Difference]: Without dead ends: 89 [2022-01-18 15:30:36,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:36,017 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:36,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 59 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-18 15:30:36,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2022-01-18 15:30:36,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.076923076923077) internal successors, (135), 65 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 135 transitions. [2022-01-18 15:30:36,018 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 135 transitions. Word has length 15 [2022-01-18 15:30:36,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:36,019 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 135 transitions. [2022-01-18 15:30:36,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,019 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 135 transitions. [2022-01-18 15:30:36,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:36,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:36,019 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:36,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-01-18 15:30:36,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:36,234 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:36,235 INFO L85 PathProgramCache]: Analyzing trace with hash 889281204, now seen corresponding path program 51 times [2022-01-18 15:30:36,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:36,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107809951] [2022-01-18 15:30:36,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:36,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:36,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107809951] [2022-01-18 15:30:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107809951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:36,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027588535] [2022-01-18 15:30:36,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:36,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:36,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:36,291 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:36,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 15:30:36,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:30:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:36,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:36,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:36,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:36,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:36,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:36,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:36,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:36,493 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:36,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:36,517 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:36,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027588535] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:36,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:36,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:36,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974409387] [2022-01-18 15:30:36,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:36,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:36,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:36,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:36,518 INFO L87 Difference]: Start difference. First operand 66 states and 135 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:36,641 INFO L93 Difference]: Finished difference Result 80 states and 160 transitions. [2022-01-18 15:30:36,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:36,642 INFO L225 Difference]: With dead ends: 80 [2022-01-18 15:30:36,642 INFO L226 Difference]: Without dead ends: 78 [2022-01-18 15:30:36,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:36,642 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:36,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 45 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:36,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-18 15:30:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-01-18 15:30:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 134 transitions. [2022-01-18 15:30:36,643 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 134 transitions. Word has length 15 [2022-01-18 15:30:36,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:36,643 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 134 transitions. [2022-01-18 15:30:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 134 transitions. [2022-01-18 15:30:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:36,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:36,644 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:36,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:36,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:36,844 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:36,845 INFO L85 PathProgramCache]: Analyzing trace with hash -778595380, now seen corresponding path program 52 times [2022-01-18 15:30:36,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:36,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528325672] [2022-01-18 15:30:36,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:36,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:36,897 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:36,897 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528325672] [2022-01-18 15:30:36,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528325672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:36,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763034911] [2022-01-18 15:30:36,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:36,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:36,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:36,900 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:36,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 15:30:36,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:36,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:36,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:36,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:36,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:36,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:30:36,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:36,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:30:37,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:37,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:37,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:37,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:37,102 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:37,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:37,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763034911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:37,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:37,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:37,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90183647] [2022-01-18 15:30:37,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:37,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:37,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:37,152 INFO L87 Difference]: Start difference. First operand 66 states and 134 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:37,237 INFO L93 Difference]: Finished difference Result 75 states and 151 transitions. [2022-01-18 15:30:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:37,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:37,237 INFO L225 Difference]: With dead ends: 75 [2022-01-18 15:30:37,237 INFO L226 Difference]: Without dead ends: 75 [2022-01-18 15:30:37,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:37,238 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:37,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 45 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:37,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-18 15:30:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-01-18 15:30:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2022-01-18 15:30:37,239 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2022-01-18 15:30:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:37,239 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2022-01-18 15:30:37,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2022-01-18 15:30:37,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:37,239 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:37,239 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:37,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-18 15:30:37,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:37,447 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash 463504274, now seen corresponding path program 53 times [2022-01-18 15:30:37,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505130454] [2022-01-18 15:30:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:37,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:37,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:37,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505130454] [2022-01-18 15:30:37,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505130454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:37,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854903880] [2022-01-18 15:30:37,502 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:37,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:37,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:37,503 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:37,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 15:30:37,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:37,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:37,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:37,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:37,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:37,686 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:37,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:30:37,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:30:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:37,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854903880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:37,711 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:37,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-18 15:30:37,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568501430] [2022-01-18 15:30:37,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:37,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:30:37,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:30:37,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:37,712 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:37,839 INFO L93 Difference]: Finished difference Result 93 states and 180 transitions. [2022-01-18 15:30:37,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:37,839 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:37,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:37,839 INFO L225 Difference]: With dead ends: 93 [2022-01-18 15:30:37,839 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 15:30:37,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:37,840 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:37,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:37,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 15:30:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2022-01-18 15:30:37,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.098360655737705) internal successors, (128), 61 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 128 transitions. [2022-01-18 15:30:37,841 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 128 transitions. Word has length 15 [2022-01-18 15:30:37,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:37,841 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 128 transitions. [2022-01-18 15:30:37,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:37,841 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 128 transitions. [2022-01-18 15:30:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:37,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:37,841 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:37,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 15:30:38,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:38,054 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:38,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:38,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1382954908, now seen corresponding path program 54 times [2022-01-18 15:30:38,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:38,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608730483] [2022-01-18 15:30:38,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:38,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:38,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:38,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:38,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608730483] [2022-01-18 15:30:38,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608730483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:38,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867215155] [2022-01-18 15:30:38,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:38,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:38,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:38,109 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:38,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 15:30:38,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:30:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:38,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:38,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:38,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:38,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:38,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:38,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:38,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:38,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:38,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867215155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:38,371 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:38,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:38,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645137159] [2022-01-18 15:30:38,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:38,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:38,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:38,371 INFO L87 Difference]: Start difference. First operand 62 states and 128 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:38,456 INFO L93 Difference]: Finished difference Result 88 states and 165 transitions. [2022-01-18 15:30:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:38,457 INFO L225 Difference]: With dead ends: 88 [2022-01-18 15:30:38,457 INFO L226 Difference]: Without dead ends: 85 [2022-01-18 15:30:38,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:38,457 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:38,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 60 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 138 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-18 15:30:38,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-18 15:30:38,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2022-01-18 15:30:38,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.081967213114754) internal successors, (127), 61 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:38,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 127 transitions. [2022-01-18 15:30:38,459 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 127 transitions. Word has length 15 [2022-01-18 15:30:38,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:38,459 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 127 transitions. [2022-01-18 15:30:38,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:38,459 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 127 transitions. [2022-01-18 15:30:38,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:38,459 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:38,459 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:38,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:38,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:38,676 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:38,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:38,676 INFO L85 PathProgramCache]: Analyzing trace with hash -123411328, now seen corresponding path program 55 times [2022-01-18 15:30:38,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:38,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378553732] [2022-01-18 15:30:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:38,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:38,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:38,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:38,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378553732] [2022-01-18 15:30:38,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378553732] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:38,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73952611] [2022-01-18 15:30:38,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:38,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:38,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:38,736 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:38,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 15:30:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:38,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:38,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:38,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:38,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:38,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:38,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:38,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:38,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:38,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:38,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:38,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73952611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:38,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:38,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:38,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24211090] [2022-01-18 15:30:38,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:38,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:38,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:38,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:38,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:38,992 INFO L87 Difference]: Start difference. First operand 62 states and 127 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:39,152 INFO L93 Difference]: Finished difference Result 92 states and 175 transitions. [2022-01-18 15:30:39,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:30:39,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:39,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:39,153 INFO L225 Difference]: With dead ends: 92 [2022-01-18 15:30:39,153 INFO L226 Difference]: Without dead ends: 90 [2022-01-18 15:30:39,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:39,153 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:39,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 71 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 138 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:30:39,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-01-18 15:30:39,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2022-01-18 15:30:39,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2022-01-18 15:30:39,155 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2022-01-18 15:30:39,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:39,155 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2022-01-18 15:30:39,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,155 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2022-01-18 15:30:39,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:39,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:39,156 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:39,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 15:30:39,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-01-18 15:30:39,363 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1791287912, now seen corresponding path program 56 times [2022-01-18 15:30:39,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64931878] [2022-01-18 15:30:39,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:39,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:39,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:39,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64931878] [2022-01-18 15:30:39,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64931878] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:39,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719114203] [2022-01-18 15:30:39,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:39,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:39,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:39,433 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:39,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 15:30:39,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:39,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:39,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:39,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:39,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:39,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:39,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:39,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:39,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:39,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:39,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:39,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:39,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:39,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719114203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:39,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:39,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:39,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982897521] [2022-01-18 15:30:39,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:39,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:39,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:39,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:39,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:39,671 INFO L87 Difference]: Start difference. First operand 62 states and 126 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:39,740 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2022-01-18 15:30:39,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:39,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:39,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:39,741 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:39,741 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:30:39,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:39,741 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:39,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 3 Unchecked, 0.0s Time] [2022-01-18 15:30:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:30:39,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 61. [2022-01-18 15:30:39,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:39,742 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:39,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:39,742 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:39,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:39,742 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:39,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:39,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:39,743 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:39,758 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-18 15:30:39,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-01-18 15:30:39,943 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:39,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:39,943 INFO L85 PathProgramCache]: Analyzing trace with hash -658641130, now seen corresponding path program 57 times [2022-01-18 15:30:39,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:39,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599971625] [2022-01-18 15:30:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:39,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599971625] [2022-01-18 15:30:40,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599971625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:40,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838314899] [2022-01-18 15:30:40,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:40,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:40,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:40,012 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:40,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 15:30:40,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:40,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:40,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:40,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:40,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:40,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:30:40,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:40,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:30:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:40,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:40,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:40,263 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:40,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838314899] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:40,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:40,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:40,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255400894] [2022-01-18 15:30:40,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:40,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:40,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:40,331 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:40,408 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2022-01-18 15:30:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:40,408 INFO L225 Difference]: With dead ends: 70 [2022-01-18 15:30:40,409 INFO L226 Difference]: Without dead ends: 66 [2022-01-18 15:30:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:30:40,409 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:40,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 130 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-18 15:30:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-01-18 15:30:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-01-18 15:30:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.05) internal successors, (123), 60 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:40,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 123 transitions. [2022-01-18 15:30:40,410 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 123 transitions. Word has length 15 [2022-01-18 15:30:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:40,410 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 123 transitions. [2022-01-18 15:30:40,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 123 transitions. [2022-01-18 15:30:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:40,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:40,410 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:40,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:40,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:40,626 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash -715576756, now seen corresponding path program 58 times [2022-01-18 15:30:40,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:40,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491286699] [2022-01-18 15:30:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:40,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491286699] [2022-01-18 15:30:40,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491286699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:40,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455864876] [2022-01-18 15:30:40,691 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:40,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:40,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:40,692 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:40,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 15:30:40,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:40,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:40,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:40,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:40,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:40,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:40,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:40,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:40,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2022-01-18 15:30:40,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:40,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-01-18 15:30:40,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:40,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455864876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:40,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:40,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:40,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532786645] [2022-01-18 15:30:40,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:40,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:40,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:40,957 INFO L87 Difference]: Start difference. First operand 61 states and 123 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:41,021 INFO L93 Difference]: Finished difference Result 67 states and 137 transitions. [2022-01-18 15:30:41,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:41,022 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:41,022 INFO L225 Difference]: With dead ends: 67 [2022-01-18 15:30:41,022 INFO L226 Difference]: Without dead ends: 67 [2022-01-18 15:30:41,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-18 15:30:41,022 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 5 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:41,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 118 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 15:30:41,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-18 15:30:41,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2022-01-18 15:30:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.0806451612903225) internal successors, (129), 62 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2022-01-18 15:30:41,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2022-01-18 15:30:41,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:41,023 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2022-01-18 15:30:41,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,024 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2022-01-18 15:30:41,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:41,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:41,024 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:41,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 15:30:41,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:41,224 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:41,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -731037552, now seen corresponding path program 59 times [2022-01-18 15:30:41,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:41,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752585843] [2022-01-18 15:30:41,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:41,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:41,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752585843] [2022-01-18 15:30:41,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752585843] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239631604] [2022-01-18 15:30:41,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:41,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:41,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:41,312 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:41,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 15:30:41,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:41,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:41,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:41,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:41,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:41,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:41,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:41,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:41,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:41,543 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:41,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:30:41,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:30:41,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:41,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239631604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:41,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:41,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 15:30:41,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535280410] [2022-01-18 15:30:41,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:41,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:30:41,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:41,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:30:41,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:41,562 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:41,685 INFO L93 Difference]: Finished difference Result 73 states and 149 transitions. [2022-01-18 15:30:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:41,686 INFO L225 Difference]: With dead ends: 73 [2022-01-18 15:30:41,686 INFO L226 Difference]: Without dead ends: 73 [2022-01-18 15:30:41,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:41,686 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:41,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 160 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-01-18 15:30:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-18 15:30:41,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2022-01-18 15:30:41,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2022-01-18 15:30:41,689 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2022-01-18 15:30:41,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:41,689 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2022-01-18 15:30:41,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:41,689 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2022-01-18 15:30:41,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:41,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:41,689 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:41,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 15:30:41,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-01-18 15:30:41,889 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:41,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1308092286, now seen corresponding path program 60 times [2022-01-18 15:30:41,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411837303] [2022-01-18 15:30:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:41,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:41,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411837303] [2022-01-18 15:30:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411837303] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:41,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668369749] [2022-01-18 15:30:41,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:41,949 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:41,950 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:41,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 15:30:41,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:30:41,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:41,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:41,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:42,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:42,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:42,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:42,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:42,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:42,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:42,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:42,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:42,233 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:42,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:42,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668369749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:42,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:42,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:42,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609687369] [2022-01-18 15:30:42,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:42,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:42,274 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:42,390 INFO L93 Difference]: Finished difference Result 85 states and 174 transitions. [2022-01-18 15:30:42,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:42,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:42,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:42,391 INFO L225 Difference]: With dead ends: 85 [2022-01-18 15:30:42,391 INFO L226 Difference]: Without dead ends: 85 [2022-01-18 15:30:42,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:30:42,391 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:42,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 52 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 116 Invalid, 0 Unknown, 38 Unchecked, 0.0s Time] [2022-01-18 15:30:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-18 15:30:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2022-01-18 15:30:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0508474576271185) internal successors, (121), 59 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 121 transitions. [2022-01-18 15:30:42,392 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 121 transitions. Word has length 15 [2022-01-18 15:30:42,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:42,392 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 121 transitions. [2022-01-18 15:30:42,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,392 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 121 transitions. [2022-01-18 15:30:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:42,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:42,393 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:42,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:42,593 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:42,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:42,593 INFO L85 PathProgramCache]: Analyzing trace with hash -388641652, now seen corresponding path program 61 times [2022-01-18 15:30:42,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:42,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628523539] [2022-01-18 15:30:42,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:42,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:42,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:42,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:42,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628523539] [2022-01-18 15:30:42,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628523539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963634294] [2022-01-18 15:30:42,649 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:42,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:42,650 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:42,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 15:30:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:42,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:42,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:42,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:42,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:42,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:42,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:42,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:42,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:42,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:42,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:42,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963634294] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:42,904 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:42,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:42,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229086629] [2022-01-18 15:30:42,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:42,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:42,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:42,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:42,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:42,905 INFO L87 Difference]: Start difference. First operand 60 states and 121 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:42,968 INFO L93 Difference]: Finished difference Result 72 states and 146 transitions. [2022-01-18 15:30:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:30:42,968 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:42,968 INFO L225 Difference]: With dead ends: 72 [2022-01-18 15:30:42,968 INFO L226 Difference]: Without dead ends: 72 [2022-01-18 15:30:42,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:42,969 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:42,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-01-18 15:30:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-18 15:30:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 62. [2022-01-18 15:30:42,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 123 transitions. [2022-01-18 15:30:42,970 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 123 transitions. Word has length 15 [2022-01-18 15:30:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:42,970 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 123 transitions. [2022-01-18 15:30:42,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 123 transitions. [2022-01-18 15:30:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:42,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:42,970 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:42,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:43,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:43,171 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:43,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:43,171 INFO L85 PathProgramCache]: Analyzing trace with hash -216746408, now seen corresponding path program 62 times [2022-01-18 15:30:43,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:43,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385440003] [2022-01-18 15:30:43,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:43,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:43,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:43,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:43,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:43,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385440003] [2022-01-18 15:30:43,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385440003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:43,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212664394] [2022-01-18 15:30:43,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:43,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:43,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:43,225 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:43,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 15:30:43,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:43,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:43,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:43,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:43,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:43,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:43,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:43,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:43,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:43,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:43,478 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:43,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:43,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:43,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:43,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212664394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:43,489 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:43,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:43,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291955241] [2022-01-18 15:30:43,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:43,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:43,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:43,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:43,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:43,490 INFO L87 Difference]: Start difference. First operand 62 states and 123 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:43,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:43,560 INFO L93 Difference]: Finished difference Result 77 states and 155 transitions. [2022-01-18 15:30:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:43,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:43,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:43,561 INFO L225 Difference]: With dead ends: 77 [2022-01-18 15:30:43,561 INFO L226 Difference]: Without dead ends: 74 [2022-01-18 15:30:43,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:43,561 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:43,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 50 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 22 Unchecked, 0.0s Time] [2022-01-18 15:30:43,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-18 15:30:43,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2022-01-18 15:30:43,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 59 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:43,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 120 transitions. [2022-01-18 15:30:43,563 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 120 transitions. Word has length 15 [2022-01-18 15:30:43,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:43,563 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 120 transitions. [2022-01-18 15:30:43,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:43,563 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 120 transitions. [2022-01-18 15:30:43,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:43,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:43,563 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:43,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:43,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-01-18 15:30:43,767 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1895007888, now seen corresponding path program 63 times [2022-01-18 15:30:43,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:43,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842847196] [2022-01-18 15:30:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:43,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:43,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:43,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842847196] [2022-01-18 15:30:43,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842847196] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:43,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673794647] [2022-01-18 15:30:43,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:43,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:43,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:43,830 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:43,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 15:30:43,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:43,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:43,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:43,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:43,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:43,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:43,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:44,004 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:44,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:44,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:44,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:44,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:44,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673794647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:44,119 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:44,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:44,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348161734] [2022-01-18 15:30:44,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:44,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:44,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:44,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:44,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:44,120 INFO L87 Difference]: Start difference. First operand 60 states and 120 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:44,271 INFO L93 Difference]: Finished difference Result 87 states and 169 transitions. [2022-01-18 15:30:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:30:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:44,272 INFO L225 Difference]: With dead ends: 87 [2022-01-18 15:30:44,272 INFO L226 Difference]: Without dead ends: 85 [2022-01-18 15:30:44,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:44,272 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 29 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:44,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 66 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 126 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-18 15:30:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-18 15:30:44,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2022-01-18 15:30:44,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2022-01-18 15:30:44,274 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2022-01-18 15:30:44,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:44,274 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2022-01-18 15:30:44,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,274 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2022-01-18 15:30:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:44,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:44,274 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:44,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-18 15:30:44,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:44,474 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:44,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:44,475 INFO L85 PathProgramCache]: Analyzing trace with hash 732082824, now seen corresponding path program 64 times [2022-01-18 15:30:44,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:44,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432739340] [2022-01-18 15:30:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:44,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432739340] [2022-01-18 15:30:44,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432739340] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:44,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279786880] [2022-01-18 15:30:44,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:44,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:44,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:44,533 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:44,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-18 15:30:44,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:44,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:44,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:44,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:44,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:44,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:44,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:44,763 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:44,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:44,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:44,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279786880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:44,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:44,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:44,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94622168] [2022-01-18 15:30:44,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:44,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:44,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:44,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:44,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:44,775 INFO L87 Difference]: Start difference. First operand 60 states and 119 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:44,849 INFO L93 Difference]: Finished difference Result 77 states and 160 transitions. [2022-01-18 15:30:44,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:44,850 INFO L225 Difference]: With dead ends: 77 [2022-01-18 15:30:44,850 INFO L226 Difference]: Without dead ends: 77 [2022-01-18 15:30:44,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:44,850 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:44,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 94 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-18 15:30:44,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-18 15:30:44,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2022-01-18 15:30:44,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2022-01-18 15:30:44,851 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2022-01-18 15:30:44,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:44,851 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2022-01-18 15:30:44,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:44,852 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2022-01-18 15:30:44,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:44,852 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:44,852 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:44,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-18 15:30:45,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:45,067 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 716622028, now seen corresponding path program 65 times [2022-01-18 15:30:45,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:45,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955474020] [2022-01-18 15:30:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:45,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:45,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:45,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955474020] [2022-01-18 15:30:45,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955474020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:45,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418364272] [2022-01-18 15:30:45,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:45,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:45,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:45,126 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:45,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-18 15:30:45,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:45,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:45,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:45,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:45,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:45,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:30:45,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:45,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:30:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:45,377 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:45,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:45,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418364272] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:45,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:45,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:45,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607841472] [2022-01-18 15:30:45,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:45,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:45,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:45,389 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:45,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:45,455 INFO L93 Difference]: Finished difference Result 78 states and 159 transitions. [2022-01-18 15:30:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:30:45,455 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:45,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:45,456 INFO L225 Difference]: With dead ends: 78 [2022-01-18 15:30:45,456 INFO L226 Difference]: Without dead ends: 78 [2022-01-18 15:30:45,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:45,456 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 36 Unchecked, 0.0s Time] [2022-01-18 15:30:45,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-01-18 15:30:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2022-01-18 15:30:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 117 transitions. [2022-01-18 15:30:45,457 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 117 transitions. Word has length 15 [2022-01-18 15:30:45,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:45,457 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 117 transitions. [2022-01-18 15:30:45,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:45,457 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 117 transitions. [2022-01-18 15:30:45,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:45,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:45,458 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:45,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:45,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-01-18 15:30:45,658 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:45,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:45,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1864729606, now seen corresponding path program 66 times [2022-01-18 15:30:45,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:45,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110283064] [2022-01-18 15:30:45,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:45,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:45,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110283064] [2022-01-18 15:30:45,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110283064] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:45,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857615191] [2022-01-18 15:30:45,717 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:45,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:45,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:45,718 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:45,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-18 15:30:45,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:45,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:45,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:45,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:45,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:30:45,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:45,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:30:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:45,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:46,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:46,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:46,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:46,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:46,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857615191] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:46,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:46,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:46,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370237900] [2022-01-18 15:30:46,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:46,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:46,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:46,055 INFO L87 Difference]: Start difference. First operand 59 states and 117 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:46,128 INFO L93 Difference]: Finished difference Result 83 states and 159 transitions. [2022-01-18 15:30:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:46,129 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:46,129 INFO L225 Difference]: With dead ends: 83 [2022-01-18 15:30:46,129 INFO L226 Difference]: Without dead ends: 79 [2022-01-18 15:30:46,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:46,129 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:46,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 67 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 89 Invalid, 0 Unknown, 79 Unchecked, 0.0s Time] [2022-01-18 15:30:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-18 15:30:46,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-01-18 15:30:46,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.0) internal successors, (116), 58 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2022-01-18 15:30:46,130 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2022-01-18 15:30:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:46,130 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2022-01-18 15:30:46,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2022-01-18 15:30:46,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:46,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:46,131 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:46,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:46,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:46,331 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:46,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:46,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1807793980, now seen corresponding path program 67 times [2022-01-18 15:30:46,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:46,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096524853] [2022-01-18 15:30:46,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:46,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:46,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:46,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:46,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096524853] [2022-01-18 15:30:46,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096524853] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:46,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685038883] [2022-01-18 15:30:46,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:46,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:46,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:46,399 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:46,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-18 15:30:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:46,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:46,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:46,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:46,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:46,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:46,650 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:46,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:46,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:46,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685038883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:46,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:46,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:46,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512858695] [2022-01-18 15:30:46,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:46,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:46,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:46,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:46,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:46,662 INFO L87 Difference]: Start difference. First operand 59 states and 116 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:46,685 INFO L93 Difference]: Finished difference Result 74 states and 152 transitions. [2022-01-18 15:30:46,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:46,685 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:46,685 INFO L225 Difference]: With dead ends: 74 [2022-01-18 15:30:46,685 INFO L226 Difference]: Without dead ends: 74 [2022-01-18 15:30:46,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:46,686 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:46,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2022-01-18 15:30:46,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-18 15:30:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2022-01-18 15:30:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2022-01-18 15:30:46,687 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2022-01-18 15:30:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:46,687 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2022-01-18 15:30:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2022-01-18 15:30:46,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:46,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:46,687 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:46,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-01-18 15:30:46,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:46,888 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:46,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:46,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1792333184, now seen corresponding path program 68 times [2022-01-18 15:30:46,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:46,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244655930] [2022-01-18 15:30:46,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:46,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:46,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244655930] [2022-01-18 15:30:46,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244655930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:46,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786845755] [2022-01-18 15:30:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:46,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:46,955 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:46,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-18 15:30:46,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:46,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:46,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:47,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:47,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:47,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:47,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:47,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:47,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:47,216 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:47,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:47,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786845755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:47,228 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:47,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:47,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256622127] [2022-01-18 15:30:47,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:47,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:47,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:47,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:47,228 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:47,259 INFO L93 Difference]: Finished difference Result 73 states and 148 transitions. [2022-01-18 15:30:47,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:47,260 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:47,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:47,260 INFO L225 Difference]: With dead ends: 73 [2022-01-18 15:30:47,260 INFO L226 Difference]: Without dead ends: 73 [2022-01-18 15:30:47,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:47,261 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:47,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 87 Invalid, 0 Unknown, 43 Unchecked, 0.0s Time] [2022-01-18 15:30:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-18 15:30:47,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 61. [2022-01-18 15:30:47,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.033333333333333) internal successors, (122), 60 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2022-01-18 15:30:47,262 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2022-01-18 15:30:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:47,262 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2022-01-18 15:30:47,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,263 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2022-01-18 15:30:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:47,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:47,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:47,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-18 15:30:47,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:47,463 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:47,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:47,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1220878378, now seen corresponding path program 69 times [2022-01-18 15:30:47,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:47,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914995350] [2022-01-18 15:30:47,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:47,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:47,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914995350] [2022-01-18 15:30:47,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914995350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868112300] [2022-01-18 15:30:47,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:47,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:47,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:47,544 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:47,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-18 15:30:47,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:30:47,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:47,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:47,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:30:47,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:47,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:30:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:47,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:47,816 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:47,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:47,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:47,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868112300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:47,827 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:47,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:47,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594973963] [2022-01-18 15:30:47,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:47,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:47,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:47,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:47,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:47,828 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:47,856 INFO L93 Difference]: Finished difference Result 80 states and 164 transitions. [2022-01-18 15:30:47,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-18 15:30:47,856 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:47,857 INFO L225 Difference]: With dead ends: 80 [2022-01-18 15:30:47,857 INFO L226 Difference]: Without dead ends: 80 [2022-01-18 15:30:47,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:47,857 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:47,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 41 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 33 Unchecked, 0.0s Time] [2022-01-18 15:30:47,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-18 15:30:47,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 63. [2022-01-18 15:30:47,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2022-01-18 15:30:47,859 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2022-01-18 15:30:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:47,859 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2022-01-18 15:30:47,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2022-01-18 15:30:47,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:47,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:47,859 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:47,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-18 15:30:48,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-01-18 15:30:48,060 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:48,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:48,060 INFO L85 PathProgramCache]: Analyzing trace with hash -748400780, now seen corresponding path program 70 times [2022-01-18 15:30:48,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:48,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116843276] [2022-01-18 15:30:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:48,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:48,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:48,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116843276] [2022-01-18 15:30:48,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116843276] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:48,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926874469] [2022-01-18 15:30:48,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:48,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:48,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:48,128 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:48,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-18 15:30:48,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:48,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:48,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:48,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:48,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:30:48,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:30:48,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:48,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:48,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 52 [2022-01-18 15:30:48,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:30:48,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-01-18 15:30:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926874469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:48,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:48,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 15:30:48,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790877281] [2022-01-18 15:30:48,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:48,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 15:30:48,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 15:30:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-18 15:30:48,403 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:48,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:48,493 INFO L93 Difference]: Finished difference Result 108 states and 196 transitions. [2022-01-18 15:30:48,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:30:48,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:48,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:48,494 INFO L225 Difference]: With dead ends: 108 [2022-01-18 15:30:48,494 INFO L226 Difference]: Without dead ends: 102 [2022-01-18 15:30:48,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:30:48,494 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:48,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 81 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 27 Unchecked, 0.0s Time] [2022-01-18 15:30:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-01-18 15:30:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2022-01-18 15:30:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:48,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:48,495 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:48,495 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:48,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 10 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:48,495 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-18 15:30:48,496 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:48,496 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:48,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:48,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:48,696 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:48,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1889193036, now seen corresponding path program 71 times [2022-01-18 15:30:48,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:48,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870586861] [2022-01-18 15:30:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:48,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:48,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870586861] [2022-01-18 15:30:48,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870586861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215092595] [2022-01-18 15:30:48,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:48,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:48,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:48,758 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:48,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-18 15:30:48,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:30:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-18 15:30:48,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:48,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:30:48,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:30:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:48,982 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:48,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:30:48,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:30:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:48,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215092595] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:48,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:48,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-18 15:30:48,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495943705] [2022-01-18 15:30:48,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:48,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 15:30:48,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:48,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 15:30:48,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-01-18 15:30:48,993 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:49,167 INFO L93 Difference]: Finished difference Result 100 states and 202 transitions. [2022-01-18 15:30:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-01-18 15:30:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:49,168 INFO L225 Difference]: With dead ends: 100 [2022-01-18 15:30:49,168 INFO L226 Difference]: Without dead ends: 100 [2022-01-18 15:30:49,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:49,168 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 39 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:49,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 68 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 180 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-01-18 15:30:49,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-18 15:30:49,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2022-01-18 15:30:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.066666666666667) internal successors, (124), 60 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:49,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 124 transitions. [2022-01-18 15:30:49,169 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 124 transitions. Word has length 15 [2022-01-18 15:30:49,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:49,169 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 124 transitions. [2022-01-18 15:30:49,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:49,169 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 124 transitions. [2022-01-18 15:30:49,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:49,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:49,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:49,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-18 15:30:49,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:49,370 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:49,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1593740263, now seen corresponding path program 72 times [2022-01-18 15:30:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137263334] [2022-01-18 15:30:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:49,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:49,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:49,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137263334] [2022-01-18 15:30:49,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137263334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:49,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500750751] [2022-01-18 15:30:49,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:30:49,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:49,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:49,651 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:49,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-18 15:30:49,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:30:49,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:49,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:49,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:50,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:50,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:30:50,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:30:50,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:30:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:50,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:50,896 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:50,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:30:50,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:30:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:50,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500750751] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:50,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:50,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 15:30:50,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069367286] [2022-01-18 15:30:50,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:50,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:30:50,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:30:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:30:50,908 INFO L87 Difference]: Start difference. First operand 61 states and 124 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:51,414 INFO L93 Difference]: Finished difference Result 118 states and 219 transitions. [2022-01-18 15:30:51,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:51,414 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:51,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:51,415 INFO L225 Difference]: With dead ends: 118 [2022-01-18 15:30:51,415 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 15:30:51,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:30:51,415 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 193 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 447 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-01-18 15:30:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 15:30:51,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 63. [2022-01-18 15:30:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2022-01-18 15:30:51,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 16 [2022-01-18 15:30:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:51,416 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2022-01-18 15:30:51,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:51,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2022-01-18 15:30:51,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:51,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:51,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:51,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:51,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-01-18 15:30:51,617 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:51,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash 271151399, now seen corresponding path program 73 times [2022-01-18 15:30:51,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:51,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304054584] [2022-01-18 15:30:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:51,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:51,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:51,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304054584] [2022-01-18 15:30:51,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304054584] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:51,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589115829] [2022-01-18 15:30:51,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:30:51,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:51,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:51,800 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:51,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-18 15:30:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:51,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:52,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 95 [2022-01-18 15:30:52,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2022-01-18 15:30:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:52,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:52,722 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:52,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:30:52,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:30:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:52,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589115829] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:52,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:52,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:30:52,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374729589] [2022-01-18 15:30:52,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:52,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:30:52,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:52,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:30:52,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:30:52,733 INFO L87 Difference]: Start difference. First operand 63 states and 128 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:53,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:53,087 INFO L93 Difference]: Finished difference Result 114 states and 215 transitions. [2022-01-18 15:30:53,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:53,088 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:53,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:53,088 INFO L225 Difference]: With dead ends: 114 [2022-01-18 15:30:53,088 INFO L226 Difference]: Without dead ends: 107 [2022-01-18 15:30:53,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:30:53,088 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 40 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:53,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 132 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:30:53,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-18 15:30:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 67. [2022-01-18 15:30:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.0606060606060606) internal successors, (136), 66 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:53,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 136 transitions. [2022-01-18 15:30:53,090 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 136 transitions. Word has length 16 [2022-01-18 15:30:53,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:53,090 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 136 transitions. [2022-01-18 15:30:53,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:53,090 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 136 transitions. [2022-01-18 15:30:53,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:53,090 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:53,090 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:53,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-18 15:30:53,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:53,307 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:53,307 INFO L85 PathProgramCache]: Analyzing trace with hash 653871787, now seen corresponding path program 74 times [2022-01-18 15:30:53,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:53,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118667169] [2022-01-18 15:30:53,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:53,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:53,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:53,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118667169] [2022-01-18 15:30:53,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118667169] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57327028] [2022-01-18 15:30:53,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:30:53,629 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:53,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:53,630 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:53,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-18 15:30:53,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:53,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:53,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:53,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:53,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2022-01-18 15:30:53,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-01-18 15:30:54,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:54,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:54,536 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:54,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:30:54,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:30:54,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:54,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57327028] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:54,547 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:54,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:30:54,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394481687] [2022-01-18 15:30:54,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:54,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:30:54,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:30:54,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:54,548 INFO L87 Difference]: Start difference. First operand 67 states and 136 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:54,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:54,840 INFO L93 Difference]: Finished difference Result 118 states and 223 transitions. [2022-01-18 15:30:54,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:54,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:54,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:54,841 INFO L225 Difference]: With dead ends: 118 [2022-01-18 15:30:54,841 INFO L226 Difference]: Without dead ends: 111 [2022-01-18 15:30:54,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:30:54,841 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:54,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 117 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:30:54,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-18 15:30:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2022-01-18 15:30:54,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.074626865671642) internal successors, (139), 67 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 139 transitions. [2022-01-18 15:30:54,842 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 139 transitions. Word has length 16 [2022-01-18 15:30:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:54,842 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 139 transitions. [2022-01-18 15:30:54,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:54,842 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 139 transitions. [2022-01-18 15:30:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:54,842 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:54,843 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:54,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-01-18 15:30:55,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:55,043 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:55,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:55,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1774596263, now seen corresponding path program 75 times [2022-01-18 15:30:55,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:55,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617353855] [2022-01-18 15:30:55,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:55,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:55,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:55,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617353855] [2022-01-18 15:30:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617353855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:55,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113978490] [2022-01-18 15:30:55,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:30:55,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:55,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:55,274 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:55,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-18 15:30:55,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:30:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:55,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:55,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:30:55,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:30:55,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:55,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:56,161 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:56,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:30:56,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:30:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:56,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113978490] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:56,172 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:56,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:30:56,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768241626] [2022-01-18 15:30:56,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:56,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:30:56,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:56,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:30:56,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:56,175 INFO L87 Difference]: Start difference. First operand 68 states and 139 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:56,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:56,578 INFO L93 Difference]: Finished difference Result 130 states and 242 transitions. [2022-01-18 15:30:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:56,578 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:56,578 INFO L225 Difference]: With dead ends: 130 [2022-01-18 15:30:56,578 INFO L226 Difference]: Without dead ends: 123 [2022-01-18 15:30:56,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:30:56,579 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:56,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 142 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:30:56,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-18 15:30:56,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 69. [2022-01-18 15:30:56,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:56,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 143 transitions. [2022-01-18 15:30:56,580 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 143 transitions. Word has length 16 [2022-01-18 15:30:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:56,580 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 143 transitions. [2022-01-18 15:30:56,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 143 transitions. [2022-01-18 15:30:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:56,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:56,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:56,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-01-18 15:30:56,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:56,791 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:56,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1759135467, now seen corresponding path program 76 times [2022-01-18 15:30:56,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:56,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496567071] [2022-01-18 15:30:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:56,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:56,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:57,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:57,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496567071] [2022-01-18 15:30:57,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496567071] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:57,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243351647] [2022-01-18 15:30:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:30:57,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:57,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:57,060 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:57,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-18 15:30:57,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:30:57,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:57,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:57,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:30:57,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:30:57,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:57,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:57,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:30:57,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:30:57,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:30:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:57,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243351647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:57,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:57,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:30:57,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409622324] [2022-01-18 15:30:57,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:57,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:30:57,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:57,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:30:57,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:57,905 INFO L87 Difference]: Start difference. First operand 69 states and 143 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:58,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:58,311 INFO L93 Difference]: Finished difference Result 118 states and 224 transitions. [2022-01-18 15:30:58,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:58,312 INFO L225 Difference]: With dead ends: 118 [2022-01-18 15:30:58,312 INFO L226 Difference]: Without dead ends: 111 [2022-01-18 15:30:58,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:30:58,312 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:58,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 142 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:30:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-18 15:30:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 69. [2022-01-18 15:30:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 68 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 143 transitions. [2022-01-18 15:30:58,313 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 143 transitions. Word has length 16 [2022-01-18 15:30:58,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:58,313 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 143 transitions. [2022-01-18 15:30:58,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:58,314 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 143 transitions. [2022-01-18 15:30:58,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:58,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:58,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:58,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-01-18 15:30:58,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-01-18 15:30:58,523 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:30:58,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:30:58,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1824396373, now seen corresponding path program 77 times [2022-01-18 15:30:58,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:30:58,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219363757] [2022-01-18 15:30:58,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:30:58,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:30:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:30:58,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:58,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:30:58,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219363757] [2022-01-18 15:30:58,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219363757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:30:58,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506759911] [2022-01-18 15:30:58,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:30:58,787 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:30:58,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:30:58,788 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:30:58,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-18 15:30:58,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:30:58,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:30:58,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:30:58,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:30:59,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 15:30:59,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-01-18 15:30:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:59,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:30:59,695 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:30:59,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 114 [2022-01-18 15:30:59,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 81 [2022-01-18 15:30:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:30:59,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506759911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:30:59,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:30:59,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:30:59,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034131003] [2022-01-18 15:30:59,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:30:59,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:30:59,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:30:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:30:59,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:30:59,722 INFO L87 Difference]: Start difference. First operand 69 states and 143 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:59,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:30:59,934 INFO L93 Difference]: Finished difference Result 100 states and 192 transitions. [2022-01-18 15:30:59,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:30:59,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:30:59,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:30:59,935 INFO L225 Difference]: With dead ends: 100 [2022-01-18 15:30:59,935 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 15:30:59,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:30:59,935 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:30:59,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:30:59,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 15:30:59,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-01-18 15:30:59,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.1142857142857143) internal successors, (148), 70 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:59,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 148 transitions. [2022-01-18 15:30:59,936 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 148 transitions. Word has length 16 [2022-01-18 15:30:59,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:30:59,936 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 148 transitions. [2022-01-18 15:30:59,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:30:59,936 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 148 transitions. [2022-01-18 15:30:59,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:30:59,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:30:59,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:30:59,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-01-18 15:31:00,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-01-18 15:31:00,137 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:00,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2087850535, now seen corresponding path program 78 times [2022-01-18 15:31:00,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:00,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223815569] [2022-01-18 15:31:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:00,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:00,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223815569] [2022-01-18 15:31:00,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223815569] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:00,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264562819] [2022-01-18 15:31:00,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:00,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:00,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:00,469 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:00,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-18 15:31:00,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:31:00,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:00,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:00,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:00,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 95 [2022-01-18 15:31:00,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2022-01-18 15:31:00,811 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:00,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:01,304 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:01,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:31:01,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:31:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:01,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264562819] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:01,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:01,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:31:01,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420145660] [2022-01-18 15:31:01,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:31:01,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:31:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:31:01,329 INFO L87 Difference]: Start difference. First operand 71 states and 148 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:01,562 INFO L93 Difference]: Finished difference Result 104 states and 200 transitions. [2022-01-18 15:31:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:31:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:01,563 INFO L225 Difference]: With dead ends: 104 [2022-01-18 15:31:01,563 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 15:31:01,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:01,563 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:01,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 132 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:01,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 15:31:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 72. [2022-01-18 15:31:01,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.1267605633802815) internal successors, (151), 71 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:01,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 151 transitions. [2022-01-18 15:31:01,565 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 151 transitions. Word has length 16 [2022-01-18 15:31:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:01,565 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 151 transitions. [2022-01-18 15:31:01,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 151 transitions. [2022-01-18 15:31:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:01,565 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:01,565 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:01,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-18 15:31:01,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-01-18 15:31:01,779 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash -967126059, now seen corresponding path program 79 times [2022-01-18 15:31:01,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:01,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313141949] [2022-01-18 15:31:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:01,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:01,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:02,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313141949] [2022-01-18 15:31:02,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313141949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:02,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371681313] [2022-01-18 15:31:02,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:02,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:02,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:02,051 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-18 15:31:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:02,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:02,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:02,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:02,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:31:02,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:02,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:31:02,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:02,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:03,001 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:03,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 114 [2022-01-18 15:31:03,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 81 [2022-01-18 15:31:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:03,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371681313] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:03,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:03,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:31:03,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36199636] [2022-01-18 15:31:03,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:03,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:31:03,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:03,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:31:03,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:31:03,029 INFO L87 Difference]: Start difference. First operand 72 states and 151 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:03,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:03,355 INFO L93 Difference]: Finished difference Result 122 states and 229 transitions. [2022-01-18 15:31:03,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:31:03,355 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:03,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:03,356 INFO L225 Difference]: With dead ends: 122 [2022-01-18 15:31:03,356 INFO L226 Difference]: Without dead ends: 115 [2022-01-18 15:31:03,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:03,356 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:03,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 200 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 519 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-18 15:31:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-18 15:31:03,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 73. [2022-01-18 15:31:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.1527777777777777) internal successors, (155), 72 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 155 transitions. [2022-01-18 15:31:03,357 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 155 transitions. Word has length 16 [2022-01-18 15:31:03,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 155 transitions. [2022-01-18 15:31:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 155 transitions. [2022-01-18 15:31:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:03,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:03,358 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:03,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:03,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-01-18 15:31:03,573 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:03,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash -982586855, now seen corresponding path program 80 times [2022-01-18 15:31:03,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:03,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324216228] [2022-01-18 15:31:03,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:03,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:03,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:03,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324216228] [2022-01-18 15:31:03,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324216228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:03,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350107883] [2022-01-18 15:31:03,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:03,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:03,843 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:03,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-18 15:31:03,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:03,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:03,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:04,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 101 [2022-01-18 15:31:04,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 15:31:04,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:04,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:04,625 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:04,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:31:04,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:31:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:04,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350107883] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:04,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:04,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:04,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071397555] [2022-01-18 15:31:04,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:04,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:04,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:04,650 INFO L87 Difference]: Start difference. First operand 73 states and 155 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:04,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:04,886 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2022-01-18 15:31:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:31:04,887 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:04,887 INFO L225 Difference]: With dead ends: 104 [2022-01-18 15:31:04,887 INFO L226 Difference]: Without dead ends: 97 [2022-01-18 15:31:04,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:04,887 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 35 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:04,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 144 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-18 15:31:04,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2022-01-18 15:31:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.101449275362319) internal successors, (145), 69 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:04,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 145 transitions. [2022-01-18 15:31:04,889 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 145 transitions. Word has length 16 [2022-01-18 15:31:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:04,889 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 145 transitions. [2022-01-18 15:31:04,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:04,889 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 145 transitions. [2022-01-18 15:31:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:04,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:04,889 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:04,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-18 15:31:05,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:05,099 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:05,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1194424229, now seen corresponding path program 81 times [2022-01-18 15:31:05,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:05,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304154744] [2022-01-18 15:31:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:05,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:05,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304154744] [2022-01-18 15:31:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304154744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468616303] [2022-01-18 15:31:05,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:05,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:05,289 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:05,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-18 15:31:05,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:05,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:05,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 95 [2022-01-18 15:31:05,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2022-01-18 15:31:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:05,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:06,132 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:06,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:31:06,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:31:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:06,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468616303] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:06,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:06,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:31:06,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118539040] [2022-01-18 15:31:06,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:06,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:31:06,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:06,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:31:06,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:31:06,166 INFO L87 Difference]: Start difference. First operand 70 states and 145 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:06,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:06,675 INFO L93 Difference]: Finished difference Result 138 states and 259 transitions. [2022-01-18 15:31:06,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:06,675 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:06,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:06,676 INFO L225 Difference]: With dead ends: 138 [2022-01-18 15:31:06,676 INFO L226 Difference]: Without dead ends: 124 [2022-01-18 15:31:06,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:06,676 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 68 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:06,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 166 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-18 15:31:06,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2022-01-18 15:31:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1842105263157894) internal successors, (166), 76 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 166 transitions. [2022-01-18 15:31:06,677 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 166 transitions. Word has length 16 [2022-01-18 15:31:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:06,677 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 166 transitions. [2022-01-18 15:31:06,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 166 transitions. [2022-01-18 15:31:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:06,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:06,678 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:06,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-01-18 15:31:06,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-01-18 15:31:06,892 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:06,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1979818591, now seen corresponding path program 82 times [2022-01-18 15:31:06,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:06,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866294503] [2022-01-18 15:31:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:06,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:07,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:07,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866294503] [2022-01-18 15:31:07,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866294503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:07,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834502676] [2022-01-18 15:31:07,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:07,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:07,105 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:07,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-18 15:31:07,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:07,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:07,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:31:07,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:31:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:07,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:07,861 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:07,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 93 [2022-01-18 15:31:07,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:31:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:07,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834502676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:07,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:07,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:07,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587406132] [2022-01-18 15:31:07,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:07,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:07,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:07,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:07,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:07,893 INFO L87 Difference]: Start difference. First operand 77 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:08,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:08,533 INFO L93 Difference]: Finished difference Result 154 states and 282 transitions. [2022-01-18 15:31:08,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:31:08,534 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:08,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:08,534 INFO L225 Difference]: With dead ends: 154 [2022-01-18 15:31:08,534 INFO L226 Difference]: Without dead ends: 140 [2022-01-18 15:31:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:31:08,534 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 80 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:08,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 184 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:08,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-18 15:31:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 77. [2022-01-18 15:31:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1842105263157894) internal successors, (166), 76 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 166 transitions. [2022-01-18 15:31:08,536 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 166 transitions. Word has length 16 [2022-01-18 15:31:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:08,536 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 166 transitions. [2022-01-18 15:31:08,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 166 transitions. [2022-01-18 15:31:08,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:08,536 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:08,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:08,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:08,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-01-18 15:31:08,747 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:08,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1995279387, now seen corresponding path program 83 times [2022-01-18 15:31:08,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:08,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330676145] [2022-01-18 15:31:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:08,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:08,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330676145] [2022-01-18 15:31:08,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330676145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:08,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175000166] [2022-01-18 15:31:08,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:08,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:08,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:08,942 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:08,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-18 15:31:08,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:31:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:08,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:09,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:31:09,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:31:09,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:09,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:09,680 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:09,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:31:09,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:31:09,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:09,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175000166] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:09,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:09,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:09,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447506896] [2022-01-18 15:31:09,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:09,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:09,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:09,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:09,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:09,713 INFO L87 Difference]: Start difference. First operand 77 states and 166 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:10,311 INFO L93 Difference]: Finished difference Result 130 states and 246 transitions. [2022-01-18 15:31:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:10,312 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:10,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:10,312 INFO L225 Difference]: With dead ends: 130 [2022-01-18 15:31:10,312 INFO L226 Difference]: Without dead ends: 116 [2022-01-18 15:31:10,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:31:10,312 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:10,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 170 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:10,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-18 15:31:10,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 77. [2022-01-18 15:31:10,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1842105263157894) internal successors, (166), 76 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:10,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 166 transitions. [2022-01-18 15:31:10,314 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 166 transitions. Word has length 16 [2022-01-18 15:31:10,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:10,314 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 166 transitions. [2022-01-18 15:31:10,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:10,314 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 166 transitions. [2022-01-18 15:31:10,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:10,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:10,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:10,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:10,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-01-18 15:31:10,515 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:10,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:10,515 INFO L85 PathProgramCache]: Analyzing trace with hash -904107435, now seen corresponding path program 84 times [2022-01-18 15:31:10,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:10,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747120612] [2022-01-18 15:31:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:10,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:10,746 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747120612] [2022-01-18 15:31:10,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747120612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:10,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78232888] [2022-01-18 15:31:10,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:10,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:10,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:10,749 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:10,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-18 15:31:10,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:10,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:10,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:10,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:10,949 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:10,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:31:10,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:10,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:31:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:11,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:11,552 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:11,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:31:11,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:31:11,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:11,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78232888] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:11,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:11,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:31:11,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041008683] [2022-01-18 15:31:11,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:11,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:31:11,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:11,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:31:11,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:11,588 INFO L87 Difference]: Start difference. First operand 77 states and 166 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:12,140 INFO L93 Difference]: Finished difference Result 173 states and 319 transitions. [2022-01-18 15:31:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:31:12,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:12,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:12,140 INFO L225 Difference]: With dead ends: 173 [2022-01-18 15:31:12,140 INFO L226 Difference]: Without dead ends: 159 [2022-01-18 15:31:12,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:12,140 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 88 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:12,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 225 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:12,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-18 15:31:12,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 80. [2022-01-18 15:31:12,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.240506329113924) internal successors, (177), 79 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:12,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 177 transitions. [2022-01-18 15:31:12,142 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 177 transitions. Word has length 16 [2022-01-18 15:31:12,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:12,142 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 177 transitions. [2022-01-18 15:31:12,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 177 transitions. [2022-01-18 15:31:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:12,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:12,142 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:12,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-18 15:31:12,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:12,352 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:12,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:12,353 INFO L85 PathProgramCache]: Analyzing trace with hash -919568231, now seen corresponding path program 85 times [2022-01-18 15:31:12,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:12,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464056209] [2022-01-18 15:31:12,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:12,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:12,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464056209] [2022-01-18 15:31:12,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464056209] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:12,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107381401] [2022-01-18 15:31:12,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:12,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:12,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:12,580 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:12,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-18 15:31:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:12,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:12,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 101 [2022-01-18 15:31:12,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 15:31:12,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:12,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:13,175 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:13,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:31:13,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:31:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:13,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107381401] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:13,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:13,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:13,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605720957] [2022-01-18 15:31:13,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:13,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:13,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:13,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:13,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:13,207 INFO L87 Difference]: Start difference. First operand 80 states and 177 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:13,707 INFO L93 Difference]: Finished difference Result 175 states and 322 transitions. [2022-01-18 15:31:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:13,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:13,708 INFO L225 Difference]: With dead ends: 175 [2022-01-18 15:31:13,708 INFO L226 Difference]: Without dead ends: 161 [2022-01-18 15:31:13,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:31:13,708 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 63 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:13,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 216 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:13,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-18 15:31:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 79. [2022-01-18 15:31:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.217948717948718) internal successors, (173), 78 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:13,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 173 transitions. [2022-01-18 15:31:13,711 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 173 transitions. Word has length 16 [2022-01-18 15:31:13,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:13,711 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 173 transitions. [2022-01-18 15:31:13,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 173 transitions. [2022-01-18 15:31:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:13,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:13,713 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:13,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:13,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-01-18 15:31:13,923 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:13,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:13,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1491023037, now seen corresponding path program 86 times [2022-01-18 15:31:13,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:13,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004750462] [2022-01-18 15:31:13,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:13,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:14,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:14,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004750462] [2022-01-18 15:31:14,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004750462] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:14,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980669451] [2022-01-18 15:31:14,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:14,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:14,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:14,087 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:14,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-18 15:31:14,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:14,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:14,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:31:14,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:14,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:14,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 137 [2022-01-18 15:31:14,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:14,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 137 treesize of output 115 [2022-01-18 15:31:14,941 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:14,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:15,541 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:15,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 174 [2022-01-18 15:31:15,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 143 [2022-01-18 15:31:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:15,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980669451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:15,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:15,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:31:15,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744685455] [2022-01-18 15:31:15,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:15,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:31:15,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:31:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:15,653 INFO L87 Difference]: Start difference. First operand 79 states and 173 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:16,015 INFO L93 Difference]: Finished difference Result 135 states and 258 transitions. [2022-01-18 15:31:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:31:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:16,015 INFO L225 Difference]: With dead ends: 135 [2022-01-18 15:31:16,015 INFO L226 Difference]: Without dead ends: 121 [2022-01-18 15:31:16,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:16,016 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:16,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 177 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 425 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-01-18 15:31:16,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-18 15:31:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2022-01-18 15:31:16,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.225) internal successors, (178), 80 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 178 transitions. [2022-01-18 15:31:16,017 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 178 transitions. Word has length 16 [2022-01-18 15:31:16,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:16,017 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 178 transitions. [2022-01-18 15:31:16,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,017 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 178 transitions. [2022-01-18 15:31:16,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:16,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:16,018 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:16,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-18 15:31:16,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2022-01-18 15:31:16,233 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:16,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2815567, now seen corresponding path program 87 times [2022-01-18 15:31:16,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:16,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942937027] [2022-01-18 15:31:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:16,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:16,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:16,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942937027] [2022-01-18 15:31:16,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942937027] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:16,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482434649] [2022-01-18 15:31:16,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:16,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:16,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:16,323 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:16,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-18 15:31:16,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:31:16,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:16,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:31:16,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:16,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:16,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:31:16,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:16,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:31:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:16,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:16,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:16,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 15:31:16,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:16,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 26 [2022-01-18 15:31:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:16,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482434649] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:16,696 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:16,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:31:16,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595512586] [2022-01-18 15:31:16,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:16,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:16,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:16,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:16,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:16,697 INFO L87 Difference]: Start difference. First operand 81 states and 178 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:16,754 INFO L93 Difference]: Finished difference Result 89 states and 195 transitions. [2022-01-18 15:31:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:31:16,754 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:16,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:16,754 INFO L225 Difference]: With dead ends: 89 [2022-01-18 15:31:16,754 INFO L226 Difference]: Without dead ends: 89 [2022-01-18 15:31:16,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:16,755 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:16,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 90 Invalid, 0 Unknown, 7 Unchecked, 0.0s Time] [2022-01-18 15:31:16,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-18 15:31:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2022-01-18 15:31:16,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 86 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 192 transitions. [2022-01-18 15:31:16,756 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 192 transitions. Word has length 16 [2022-01-18 15:31:16,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:16,756 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 192 transitions. [2022-01-18 15:31:16,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 192 transitions. [2022-01-18 15:31:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:16,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:16,757 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:16,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-18 15:31:16,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-01-18 15:31:16,964 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:16,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 169674323, now seen corresponding path program 88 times [2022-01-18 15:31:16,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963230777] [2022-01-18 15:31:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:16,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:16,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:17,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963230777] [2022-01-18 15:31:17,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963230777] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:17,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285204750] [2022-01-18 15:31:17,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:17,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:17,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:17,047 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:17,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-18 15:31:17,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:17,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:17,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:31:17,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:17,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:17,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:31:17,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:17,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:31:17,246 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:17,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:17,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:17,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:31:17,404 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:17,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 15:31:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:17,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285204750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:17,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:17,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:31:17,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543797255] [2022-01-18 15:31:17,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:17,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:17,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:17,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:17,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:17,430 INFO L87 Difference]: Start difference. First operand 87 states and 192 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:17,489 INFO L93 Difference]: Finished difference Result 93 states and 201 transitions. [2022-01-18 15:31:17,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:31:17,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:17,490 INFO L225 Difference]: With dead ends: 93 [2022-01-18 15:31:17,490 INFO L226 Difference]: Without dead ends: 93 [2022-01-18 15:31:17,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:17,490 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:17,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-18 15:31:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-18 15:31:17,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-01-18 15:31:17,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.2325581395348837) internal successors, (192), 86 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:17,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 192 transitions. [2022-01-18 15:31:17,491 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 192 transitions. Word has length 16 [2022-01-18 15:31:17,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:17,491 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 192 transitions. [2022-01-18 15:31:17,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:17,491 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 192 transitions. [2022-01-18 15:31:17,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:17,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:17,492 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:17,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:17,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:17,692 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:17,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:17,692 INFO L85 PathProgramCache]: Analyzing trace with hash 169079677, now seen corresponding path program 89 times [2022-01-18 15:31:17,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:17,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806181723] [2022-01-18 15:31:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:17,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:17,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806181723] [2022-01-18 15:31:17,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806181723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:17,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878713550] [2022-01-18 15:31:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:17,766 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:17,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:17,767 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:17,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-18 15:31:17,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:31:17,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:17,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:31:17,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:17,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:31:17,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:17,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:31:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:17,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:18,079 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:18,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-18 15:31:18,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-18 15:31:18,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:18,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878713550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:18,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:18,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:31:18,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527209779] [2022-01-18 15:31:18,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:18,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:18,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:18,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:18,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:18,109 INFO L87 Difference]: Start difference. First operand 87 states and 192 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:18,229 INFO L93 Difference]: Finished difference Result 96 states and 206 transitions. [2022-01-18 15:31:18,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:31:18,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:18,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:18,230 INFO L225 Difference]: With dead ends: 96 [2022-01-18 15:31:18,230 INFO L226 Difference]: Without dead ends: 96 [2022-01-18 15:31:18,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:31:18,230 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 21 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:18,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-01-18 15:31:18,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-18 15:31:18,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2022-01-18 15:31:18,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.238095238095238) internal successors, (188), 84 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 188 transitions. [2022-01-18 15:31:18,232 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 188 transitions. Word has length 16 [2022-01-18 15:31:18,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:18,232 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 188 transitions. [2022-01-18 15:31:18,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 188 transitions. [2022-01-18 15:31:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:18,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:18,232 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:18,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:18,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:18,435 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1290398799, now seen corresponding path program 90 times [2022-01-18 15:31:18,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:18,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703214295] [2022-01-18 15:31:18,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:18,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:18,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:18,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:18,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703214295] [2022-01-18 15:31:18,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703214295] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:18,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018750729] [2022-01-18 15:31:18,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:18,512 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:18,513 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:18,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-18 15:31:18,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:18,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:31:18,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:18,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:18,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:31:18,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:18,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:31:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:18,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:18,847 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:18,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:31:18,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:18,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 15:31:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:18,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018750729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:18,881 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:18,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:31:18,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585566951] [2022-01-18 15:31:18,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:18,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:18,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:18,882 INFO L87 Difference]: Start difference. First operand 85 states and 188 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:18,953 INFO L93 Difference]: Finished difference Result 91 states and 197 transitions. [2022-01-18 15:31:18,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:31:18,954 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:18,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:18,954 INFO L225 Difference]: With dead ends: 91 [2022-01-18 15:31:18,954 INFO L226 Difference]: Without dead ends: 91 [2022-01-18 15:31:18,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:18,954 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:18,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 56 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 149 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 15:31:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-18 15:31:18,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2022-01-18 15:31:18,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.225) internal successors, (178), 80 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 178 transitions. [2022-01-18 15:31:18,956 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 178 transitions. Word has length 16 [2022-01-18 15:31:18,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:18,956 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 178 transitions. [2022-01-18 15:31:18,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:18,956 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 178 transitions. [2022-01-18 15:31:18,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:18,956 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:18,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:18,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-18 15:31:19,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:19,156 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:19,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:19,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1564616985, now seen corresponding path program 91 times [2022-01-18 15:31:19,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:19,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719310669] [2022-01-18 15:31:19,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:19,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:19,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:19,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:19,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719310669] [2022-01-18 15:31:19,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719310669] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:19,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910430128] [2022-01-18 15:31:19,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:19,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:19,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:19,341 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:19,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-18 15:31:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:19,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:19,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:19,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 15:31:19,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-01-18 15:31:19,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:19,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:20,175 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:20,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:20,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:20,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910430128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:20,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:20,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:20,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319994477] [2022-01-18 15:31:20,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:20,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:20,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:20,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:20,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:20,209 INFO L87 Difference]: Start difference. First operand 81 states and 178 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:20,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:20,676 INFO L93 Difference]: Finished difference Result 167 states and 328 transitions. [2022-01-18 15:31:20,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:20,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:20,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:20,676 INFO L225 Difference]: With dead ends: 167 [2022-01-18 15:31:20,676 INFO L226 Difference]: Without dead ends: 153 [2022-01-18 15:31:20,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:31:20,677 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 58 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:20,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 224 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:20,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-18 15:31:20,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2022-01-18 15:31:20,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3010752688172045) internal successors, (214), 93 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 214 transitions. [2022-01-18 15:31:20,678 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 214 transitions. Word has length 16 [2022-01-18 15:31:20,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:20,678 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 214 transitions. [2022-01-18 15:31:20,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:20,678 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 214 transitions. [2022-01-18 15:31:20,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:20,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:20,679 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:20,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:20,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-01-18 15:31:20,894 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2101347231, now seen corresponding path program 92 times [2022-01-18 15:31:20,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:20,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622896352] [2022-01-18 15:31:20,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:20,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:20,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:20,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622896352] [2022-01-18 15:31:20,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622896352] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:20,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249718504] [2022-01-18 15:31:20,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:20,967 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:20,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:20,968 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:20,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-18 15:31:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:20,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:20,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:31:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:21,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:21,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:31:21,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:21,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:31:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:21,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:21,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:21,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 34 [2022-01-18 15:31:21,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 15:31:21,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2022-01-18 15:31:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:21,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249718504] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:21,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:21,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:31:21,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409163943] [2022-01-18 15:31:21,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:21,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:21,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:21,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:21,307 INFO L87 Difference]: Start difference. First operand 94 states and 214 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:21,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:21,403 INFO L93 Difference]: Finished difference Result 112 states and 245 transitions. [2022-01-18 15:31:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:31:21,404 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:21,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:21,404 INFO L225 Difference]: With dead ends: 112 [2022-01-18 15:31:21,404 INFO L226 Difference]: Without dead ends: 112 [2022-01-18 15:31:21,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:31:21,404 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:21,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 166 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-01-18 15:31:21,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-18 15:31:21,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 92. [2022-01-18 15:31:21,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:21,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2022-01-18 15:31:21,406 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2022-01-18 15:31:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:21,406 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2022-01-18 15:31:21,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2022-01-18 15:31:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:21,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:21,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:21,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-18 15:31:21,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-01-18 15:31:21,620 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:21,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:21,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1181896597, now seen corresponding path program 93 times [2022-01-18 15:31:21,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:21,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171282246] [2022-01-18 15:31:21,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:21,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:21,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:21,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171282246] [2022-01-18 15:31:21,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171282246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:21,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289875768] [2022-01-18 15:31:21,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:21,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:21,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:21,850 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:21,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-18 15:31:21,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:21,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:21,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:21,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:22,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 108 [2022-01-18 15:31:22,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 90 [2022-01-18 15:31:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:22,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:22,738 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:22,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:22,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:22,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289875768] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:22,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:22,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:31:22,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079527417] [2022-01-18 15:31:22,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:22,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:22,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:22,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:22,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:22,770 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:23,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:23,370 INFO L93 Difference]: Finished difference Result 187 states and 362 transitions. [2022-01-18 15:31:23,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:23,371 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:23,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:23,371 INFO L225 Difference]: With dead ends: 187 [2022-01-18 15:31:23,371 INFO L226 Difference]: Without dead ends: 173 [2022-01-18 15:31:23,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:23,381 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:23,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 252 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:23,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-18 15:31:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 94. [2022-01-18 15:31:23,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:23,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2022-01-18 15:31:23,383 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 16 [2022-01-18 15:31:23,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:23,383 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2022-01-18 15:31:23,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:23,383 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2022-01-18 15:31:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:23,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:23,383 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:23,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:23,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-01-18 15:31:23,597 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash -61172121, now seen corresponding path program 94 times [2022-01-18 15:31:23,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:23,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011289957] [2022-01-18 15:31:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:23,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:23,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:23,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:23,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011289957] [2022-01-18 15:31:23,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011289957] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:23,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515355988] [2022-01-18 15:31:23,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:23,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:23,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:23,791 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:23,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-18 15:31:23,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:23,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:23,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:23,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:23,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:31:23,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:31:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:24,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:24,528 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:24,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:24,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:24,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515355988] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:24,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:24,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:24,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047618284] [2022-01-18 15:31:24,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:24,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:24,560 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:25,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:25,237 INFO L93 Difference]: Finished difference Result 202 states and 387 transitions. [2022-01-18 15:31:25,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:25,238 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:25,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:25,238 INFO L225 Difference]: With dead ends: 202 [2022-01-18 15:31:25,238 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 15:31:25,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:25,238 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:25,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 233 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:31:25,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 15:31:25,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 95. [2022-01-18 15:31:25,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 2.3297872340425534) internal successors, (219), 94 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:25,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 219 transitions. [2022-01-18 15:31:25,240 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 219 transitions. Word has length 16 [2022-01-18 15:31:25,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:25,240 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 219 transitions. [2022-01-18 15:31:25,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:25,240 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 219 transitions. [2022-01-18 15:31:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:25,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:25,240 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:25,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-18 15:31:25,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-01-18 15:31:25,456 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:25,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash -76632917, now seen corresponding path program 95 times [2022-01-18 15:31:25,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:25,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434108155] [2022-01-18 15:31:25,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:25,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:25,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434108155] [2022-01-18 15:31:25,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434108155] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:25,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493507564] [2022-01-18 15:31:25,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:25,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:25,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:25,687 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:25,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-18 15:31:25,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:31:25,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:25,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:31:25,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:31:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:25,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:26,423 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:26,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:31:26,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:31:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:26,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493507564] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:26,455 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:26,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:31:26,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254658530] [2022-01-18 15:31:26,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:26,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:26,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:26,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:26,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:26,456 INFO L87 Difference]: Start difference. First operand 95 states and 219 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:27,073 INFO L93 Difference]: Finished difference Result 175 states and 346 transitions. [2022-01-18 15:31:27,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:31:27,074 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:27,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:27,074 INFO L225 Difference]: With dead ends: 175 [2022-01-18 15:31:27,074 INFO L226 Difference]: Without dead ends: 161 [2022-01-18 15:31:27,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:27,074 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 54 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:27,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 247 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:31:27,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-18 15:31:27,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 92. [2022-01-18 15:31:27,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2967032967032965) internal successors, (209), 91 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:27,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 209 transitions. [2022-01-18 15:31:27,076 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 209 transitions. Word has length 16 [2022-01-18 15:31:27,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:27,076 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 209 transitions. [2022-01-18 15:31:27,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:27,076 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 209 transitions. [2022-01-18 15:31:27,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:27,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:27,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:27,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-01-18 15:31:27,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-01-18 15:31:27,277 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:27,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:27,277 INFO L85 PathProgramCache]: Analyzing trace with hash 771680747, now seen corresponding path program 96 times [2022-01-18 15:31:27,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:27,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625069558] [2022-01-18 15:31:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:27,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:27,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:27,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625069558] [2022-01-18 15:31:27,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625069558] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:27,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164218289] [2022-01-18 15:31:27,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:27,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:27,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:27,490 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:27,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-18 15:31:27,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:27,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:27,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:27,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2022-01-18 15:31:27,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2022-01-18 15:31:27,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:27,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:28,265 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:28,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:31:28,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:31:28,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:28,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164218289] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:28,303 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:31:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588819072] [2022-01-18 15:31:28,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:28,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:28,304 INFO L87 Difference]: Start difference. First operand 92 states and 209 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:28,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:28,719 INFO L93 Difference]: Finished difference Result 168 states and 343 transitions. [2022-01-18 15:31:28,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:31:28,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:28,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:28,720 INFO L225 Difference]: With dead ends: 168 [2022-01-18 15:31:28,720 INFO L226 Difference]: Without dead ends: 154 [2022-01-18 15:31:28,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:31:28,720 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 52 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:28,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 171 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:28,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-01-18 15:31:28,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 99. [2022-01-18 15:31:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.357142857142857) internal successors, (231), 98 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 231 transitions. [2022-01-18 15:31:28,722 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 231 transitions. Word has length 16 [2022-01-18 15:31:28,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:28,722 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 231 transitions. [2022-01-18 15:31:28,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 231 transitions. [2022-01-18 15:31:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:28,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:28,722 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:28,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:28,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:28,937 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:28,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1892405223, now seen corresponding path program 97 times [2022-01-18 15:31:28,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408108798] [2022-01-18 15:31:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:28,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:29,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:29,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408108798] [2022-01-18 15:31:29,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408108798] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:29,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903825427] [2022-01-18 15:31:29,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:29,115 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:29,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:29,116 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:29,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-18 15:31:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:29,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:29,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:29,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:31:29,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:31:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:29,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:29,838 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:29,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:31:29,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:31:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:29,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903825427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:29,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:29,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:31:29,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276806600] [2022-01-18 15:31:29,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:29,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:29,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:29,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:29,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:29,877 INFO L87 Difference]: Start difference. First operand 99 states and 231 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:30,436 INFO L93 Difference]: Finished difference Result 198 states and 391 transitions. [2022-01-18 15:31:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:30,436 INFO L225 Difference]: With dead ends: 198 [2022-01-18 15:31:30,436 INFO L226 Difference]: Without dead ends: 184 [2022-01-18 15:31:30,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:31:30,437 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 58 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:30,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 207 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-18 15:31:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 100. [2022-01-18 15:31:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3737373737373737) internal successors, (235), 99 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 235 transitions. [2022-01-18 15:31:30,438 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 235 transitions. Word has length 16 [2022-01-18 15:31:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:30,438 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 235 transitions. [2022-01-18 15:31:30,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 235 transitions. [2022-01-18 15:31:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:30,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:30,439 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:30,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:30,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:30,643 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1876944427, now seen corresponding path program 98 times [2022-01-18 15:31:30,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:30,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760245960] [2022-01-18 15:31:30,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:30,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:30,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760245960] [2022-01-18 15:31:30,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760245960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:30,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115288931] [2022-01-18 15:31:30,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:30,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:30,844 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:30,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-18 15:31:30,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:30,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:30,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2022-01-18 15:31:30,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-01-18 15:31:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:31,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:31,542 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:31,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:31:31,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:31:31,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:31,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115288931] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:31,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:31,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:31:31,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432467647] [2022-01-18 15:31:31,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:31,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:31,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:31,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:31,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:31,582 INFO L87 Difference]: Start difference. First operand 100 states and 235 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:32,020 INFO L93 Difference]: Finished difference Result 174 states and 355 transitions. [2022-01-18 15:31:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:31:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:32,021 INFO L225 Difference]: With dead ends: 174 [2022-01-18 15:31:32,021 INFO L226 Difference]: Without dead ends: 160 [2022-01-18 15:31:32,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:31:32,021 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:32,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 161 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-18 15:31:32,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 97. [2022-01-18 15:31:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.3333333333333335) internal successors, (224), 96 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:32,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 224 transitions. [2022-01-18 15:31:32,023 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 224 transitions. Word has length 16 [2022-01-18 15:31:32,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:32,023 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 224 transitions. [2022-01-18 15:31:32,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:32,023 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 224 transitions. [2022-01-18 15:31:32,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:32,023 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:32,024 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:32,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:32,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-01-18 15:31:32,235 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:32,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1326850917, now seen corresponding path program 99 times [2022-01-18 15:31:32,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:32,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729590105] [2022-01-18 15:31:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:32,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:32,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729590105] [2022-01-18 15:31:32,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729590105] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:32,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971601282] [2022-01-18 15:31:32,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:32,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:32,452 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:32,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-18 15:31:32,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:31:32,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:32,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:31:32,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:32,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:32,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:31:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:32,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:31:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:33,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:33,786 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:33,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 148 [2022-01-18 15:31:33,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 15:31:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:33,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971601282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:33,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:33,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 15:31:33,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591241577] [2022-01-18 15:31:33,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:33,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:31:33,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:33,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:31:33,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:31:33,905 INFO L87 Difference]: Start difference. First operand 97 states and 224 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:35,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:35,488 INFO L93 Difference]: Finished difference Result 189 states and 389 transitions. [2022-01-18 15:31:35,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:31:35,488 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:35,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:35,488 INFO L225 Difference]: With dead ends: 189 [2022-01-18 15:31:35,488 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 15:31:35,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:31:35,489 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:35,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 172 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 459 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-01-18 15:31:35,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 15:31:35,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 100. [2022-01-18 15:31:35,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3838383838383836) internal successors, (236), 99 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:35,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 236 transitions. [2022-01-18 15:31:35,490 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 236 transitions. Word has length 16 [2022-01-18 15:31:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:35,490 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 236 transitions. [2022-01-18 15:31:35,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 236 transitions. [2022-01-18 15:31:35,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:35,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:35,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:35,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-18 15:31:35,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2022-01-18 15:31:35,705 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:35,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1342311713, now seen corresponding path program 100 times [2022-01-18 15:31:35,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:35,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042145566] [2022-01-18 15:31:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:35,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:35,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042145566] [2022-01-18 15:31:35,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042145566] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406675357] [2022-01-18 15:31:35,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:35,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:35,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:35,940 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:35,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-18 15:31:35,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:35,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:36,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-01-18 15:31:36,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-01-18 15:31:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:36,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:36,681 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:36,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:31:36,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:31:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:36,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406675357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:36,720 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:36,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:31:36,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197716875] [2022-01-18 15:31:36,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:36,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:36,721 INFO L87 Difference]: Start difference. First operand 100 states and 236 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:37,260 INFO L93 Difference]: Finished difference Result 162 states and 330 transitions. [2022-01-18 15:31:37,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:31:37,260 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:37,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:37,261 INFO L225 Difference]: With dead ends: 162 [2022-01-18 15:31:37,261 INFO L226 Difference]: Without dead ends: 148 [2022-01-18 15:31:37,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:37,261 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:37,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 101 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:31:37,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-18 15:31:37,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2022-01-18 15:31:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3838383838383836) internal successors, (236), 99 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 236 transitions. [2022-01-18 15:31:37,262 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 236 transitions. Word has length 16 [2022-01-18 15:31:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:37,263 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 236 transitions. [2022-01-18 15:31:37,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 236 transitions. [2022-01-18 15:31:37,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:37,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:37,263 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:37,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-18 15:31:37,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:37,478 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:37,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:37,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1913766519, now seen corresponding path program 101 times [2022-01-18 15:31:37,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:37,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746537061] [2022-01-18 15:31:37,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:37,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:37,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:37,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746537061] [2022-01-18 15:31:37,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746537061] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:37,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717300442] [2022-01-18 15:31:37,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:37,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:37,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:37,715 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:37,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-18 15:31:37,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:37,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:37,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:37,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:37,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:37,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:31:37,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:37,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:31:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:38,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:38,527 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:38,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:31:38,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:31:38,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:31:38,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717300442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:38,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:38,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-18 15:31:38,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777488151] [2022-01-18 15:31:38,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:38,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:31:38,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:38,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:31:38,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:38,571 INFO L87 Difference]: Start difference. First operand 100 states and 236 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:39,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:39,175 INFO L93 Difference]: Finished difference Result 141 states and 297 transitions. [2022-01-18 15:31:39,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:31:39,175 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:39,176 INFO L225 Difference]: With dead ends: 141 [2022-01-18 15:31:39,176 INFO L226 Difference]: Without dead ends: 123 [2022-01-18 15:31:39,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:31:39,176 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:39,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 160 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:39,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-18 15:31:39,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 100. [2022-01-18 15:31:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.3737373737373737) internal successors, (235), 99 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 235 transitions. [2022-01-18 15:31:39,178 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 235 transitions. Word has length 16 [2022-01-18 15:31:39,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:39,178 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 235 transitions. [2022-01-18 15:31:39,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:39,178 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 235 transitions. [2022-01-18 15:31:39,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:39,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:39,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:39,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-18 15:31:39,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:39,378 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:39,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:39,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1955423847, now seen corresponding path program 102 times [2022-01-18 15:31:39,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876057564] [2022-01-18 15:31:39,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:39,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:39,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:39,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876057564] [2022-01-18 15:31:39,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876057564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:39,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202507789] [2022-01-18 15:31:39,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:39,580 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:39,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:39,580 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:39,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-18 15:31:39,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:39,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:39,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:39,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:39,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-01-18 15:31:39,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-01-18 15:31:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:39,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:40,308 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:40,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:31:40,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:31:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:40,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202507789] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:40,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:40,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:40,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289194633] [2022-01-18 15:31:40,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:40,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:40,338 INFO L87 Difference]: Start difference. First operand 100 states and 235 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:40,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:40,970 INFO L93 Difference]: Finished difference Result 204 states and 411 transitions. [2022-01-18 15:31:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:40,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:40,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:40,971 INFO L225 Difference]: With dead ends: 204 [2022-01-18 15:31:40,971 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 15:31:40,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:31:40,971 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 81 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:40,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 176 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 15:31:40,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 105. [2022-01-18 15:31:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.423076923076923) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2022-01-18 15:31:40,975 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 16 [2022-01-18 15:31:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2022-01-18 15:31:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2022-01-18 15:31:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:40,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:40,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:40,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-18 15:31:41,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-18 15:31:41,177 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:41,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1939963051, now seen corresponding path program 103 times [2022-01-18 15:31:41,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:41,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049566837] [2022-01-18 15:31:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:41,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:41,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:41,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049566837] [2022-01-18 15:31:41,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049566837] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:41,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939666140] [2022-01-18 15:31:41,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:41,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:41,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:41,378 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:41,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-18 15:31:41,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:41,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:41,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:41,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 115 [2022-01-18 15:31:41,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 91 [2022-01-18 15:31:41,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:41,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:42,107 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:42,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:42,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:42,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939666140] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:42,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:42,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:42,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157839891] [2022-01-18 15:31:42,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:42,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:42,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:42,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:42,138 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:42,756 INFO L93 Difference]: Finished difference Result 208 states and 417 transitions. [2022-01-18 15:31:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:31:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:42,757 INFO L225 Difference]: With dead ends: 208 [2022-01-18 15:31:42,757 INFO L226 Difference]: Without dead ends: 194 [2022-01-18 15:31:42,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:42,757 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:42,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 184 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:42,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-01-18 15:31:42,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 105. [2022-01-18 15:31:42,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 2.423076923076923) internal successors, (252), 104 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:42,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 252 transitions. [2022-01-18 15:31:42,759 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 252 transitions. Word has length 16 [2022-01-18 15:31:42,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:42,759 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 252 transitions. [2022-01-18 15:31:42,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 252 transitions. [2022-01-18 15:31:42,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:42,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:42,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:42,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-18 15:31:42,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-01-18 15:31:42,960 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:42,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1368508245, now seen corresponding path program 104 times [2022-01-18 15:31:42,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:42,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723021826] [2022-01-18 15:31:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:42,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:43,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:43,126 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:43,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723021826] [2022-01-18 15:31:43,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723021826] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:43,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459862188] [2022-01-18 15:31:43,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:43,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:43,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:43,127 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:43,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-18 15:31:43,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:43,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:43,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:43,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:31:43,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:31:43,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:43,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:43,920 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:43,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:31:43,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:31:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:43,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459862188] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:43,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:43,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:43,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385444356] [2022-01-18 15:31:43,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:43,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:43,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:43,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:43,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:43,950 INFO L87 Difference]: Start difference. First operand 105 states and 252 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:44,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:44,525 INFO L93 Difference]: Finished difference Result 193 states and 388 transitions. [2022-01-18 15:31:44,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:44,525 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:44,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:44,526 INFO L225 Difference]: With dead ends: 193 [2022-01-18 15:31:44,526 INFO L226 Difference]: Without dead ends: 179 [2022-01-18 15:31:44,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:44,526 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:44,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 190 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:44,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-18 15:31:44,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 103. [2022-01-18 15:31:44,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.4019607843137254) internal successors, (245), 102 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:44,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 245 transitions. [2022-01-18 15:31:44,528 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 245 transitions. Word has length 16 [2022-01-18 15:31:44,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:44,528 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 245 transitions. [2022-01-18 15:31:44,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:44,528 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 245 transitions. [2022-01-18 15:31:44,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:44,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:44,528 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:44,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:44,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-01-18 15:31:44,729 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:44,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:44,729 INFO L85 PathProgramCache]: Analyzing trace with hash 833278443, now seen corresponding path program 105 times [2022-01-18 15:31:44,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:44,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801050659] [2022-01-18 15:31:44,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:44,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:44,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801050659] [2022-01-18 15:31:44,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801050659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:44,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836758356] [2022-01-18 15:31:44,970 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:44,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:44,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:44,971 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:44,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-18 15:31:44,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:31:44,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:44,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:44,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:45,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 113 [2022-01-18 15:31:45,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 93 [2022-01-18 15:31:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:45,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:45,891 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:45,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:45,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:45,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:45,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836758356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:45,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:45,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:31:45,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736703061] [2022-01-18 15:31:45,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:45,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:31:45,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:31:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:31:45,922 INFO L87 Difference]: Start difference. First operand 103 states and 245 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:46,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:46,352 INFO L93 Difference]: Finished difference Result 173 states and 352 transitions. [2022-01-18 15:31:46,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:46,353 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:46,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:46,353 INFO L225 Difference]: With dead ends: 173 [2022-01-18 15:31:46,353 INFO L226 Difference]: Without dead ends: 159 [2022-01-18 15:31:46,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:46,353 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:46,353 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 218 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 490 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-18 15:31:46,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-18 15:31:46,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 109. [2022-01-18 15:31:46,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3703703703703702) internal successors, (256), 108 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:46,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 256 transitions. [2022-01-18 15:31:46,355 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 256 transitions. Word has length 16 [2022-01-18 15:31:46,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:46,355 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 256 transitions. [2022-01-18 15:31:46,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 256 transitions. [2022-01-18 15:31:46,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:46,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:46,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:46,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:46,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:46,556 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:46,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:46,556 INFO L85 PathProgramCache]: Analyzing trace with hash 57093653, now seen corresponding path program 106 times [2022-01-18 15:31:46,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:46,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425452782] [2022-01-18 15:31:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:46,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:46,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:46,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425452782] [2022-01-18 15:31:46,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425452782] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:46,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541740380] [2022-01-18 15:31:46,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:46,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:46,733 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:46,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-18 15:31:46,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:46,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:46,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:46,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:47,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 99 [2022-01-18 15:31:47,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2022-01-18 15:31:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:47,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:47,659 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:47,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:47,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:47,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541740380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:47,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:47,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:47,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126857700] [2022-01-18 15:31:47,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:47,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:47,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:47,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:47,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:47,691 INFO L87 Difference]: Start difference. First operand 109 states and 256 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:48,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:48,093 INFO L93 Difference]: Finished difference Result 205 states and 423 transitions. [2022-01-18 15:31:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:48,093 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:48,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:48,093 INFO L225 Difference]: With dead ends: 205 [2022-01-18 15:31:48,093 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 15:31:48,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:31:48,094 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:48,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 197 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:48,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 15:31:48,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 116. [2022-01-18 15:31:48,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.4260869565217393) internal successors, (279), 115 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:48,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 279 transitions. [2022-01-18 15:31:48,095 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 279 transitions. Word has length 16 [2022-01-18 15:31:48,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:48,095 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 279 transitions. [2022-01-18 15:31:48,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:48,096 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 279 transitions. [2022-01-18 15:31:48,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:48,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:48,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:48,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:48,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-01-18 15:31:48,311 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:48,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 439814041, now seen corresponding path program 107 times [2022-01-18 15:31:48,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:48,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425817752] [2022-01-18 15:31:48,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:48,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:48,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425817752] [2022-01-18 15:31:48,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425817752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:48,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251193269] [2022-01-18 15:31:48,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:48,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:48,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:48,544 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:48,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-18 15:31:48,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:48,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:48,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 108 [2022-01-18 15:31:48,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 90 [2022-01-18 15:31:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:48,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:49,324 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:49,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:31:49,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:31:49,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:49,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251193269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:49,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:49,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:31:49,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035278327] [2022-01-18 15:31:49,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:49,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:49,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:49,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:49,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:49,353 INFO L87 Difference]: Start difference. First operand 116 states and 279 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:50,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:50,032 INFO L93 Difference]: Finished difference Result 234 states and 474 transitions. [2022-01-18 15:31:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:31:50,032 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:50,033 INFO L225 Difference]: With dead ends: 234 [2022-01-18 15:31:50,033 INFO L226 Difference]: Without dead ends: 213 [2022-01-18 15:31:50,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:50,033 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:50,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 295 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:31:50,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-18 15:31:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 118. [2022-01-18 15:31:50,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.4444444444444446) internal successors, (286), 117 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 286 transitions. [2022-01-18 15:31:50,035 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 286 transitions. Word has length 16 [2022-01-18 15:31:50,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:50,035 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 286 transitions. [2022-01-18 15:31:50,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:50,035 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 286 transitions. [2022-01-18 15:31:50,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:50,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:50,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:50,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:50,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-01-18 15:31:50,239 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:50,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:50,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1560538517, now seen corresponding path program 108 times [2022-01-18 15:31:50,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:50,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808996427] [2022-01-18 15:31:50,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:50,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:50,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:50,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808996427] [2022-01-18 15:31:50,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808996427] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:50,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779449116] [2022-01-18 15:31:50,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:31:50,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:50,461 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:50,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-18 15:31:50,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:31:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:50,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:50,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:31:50,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:31:50,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:51,246 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:51,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:31:51,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:31:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:51,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779449116] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:51,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:51,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:31:51,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799133492] [2022-01-18 15:31:51,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:51,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:31:51,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:51,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:31:51,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:31:51,274 INFO L87 Difference]: Start difference. First operand 118 states and 286 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:52,082 INFO L93 Difference]: Finished difference Result 249 states and 496 transitions. [2022-01-18 15:31:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:31:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:52,083 INFO L225 Difference]: With dead ends: 249 [2022-01-18 15:31:52,083 INFO L226 Difference]: Without dead ends: 228 [2022-01-18 15:31:52,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:31:52,083 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:52,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 260 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:31:52,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-18 15:31:52,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 118. [2022-01-18 15:31:52,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.4444444444444446) internal successors, (286), 117 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 286 transitions. [2022-01-18 15:31:52,085 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 286 transitions. Word has length 16 [2022-01-18 15:31:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:52,085 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 286 transitions. [2022-01-18 15:31:52,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 286 transitions. [2022-01-18 15:31:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:52,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:52,086 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:52,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-01-18 15:31:52,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-01-18 15:31:52,301 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:52,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:52,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1545077721, now seen corresponding path program 109 times [2022-01-18 15:31:52,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:52,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773272914] [2022-01-18 15:31:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:52,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:52,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:52,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773272914] [2022-01-18 15:31:52,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773272914] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:52,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382536803] [2022-01-18 15:31:52,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:31:52,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:52,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:52,552 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-18 15:31:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:52,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:52,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:52,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:31:52,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:31:52,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:52,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:53,326 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:31:53,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:31:53,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:31:53,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:53,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382536803] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:53,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:53,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:31:53,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12171747] [2022-01-18 15:31:53,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:53,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:53,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:53,354 INFO L87 Difference]: Start difference. First operand 118 states and 286 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:54,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:54,025 INFO L93 Difference]: Finished difference Result 213 states and 442 transitions. [2022-01-18 15:31:54,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:31:54,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:54,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:54,026 INFO L225 Difference]: With dead ends: 213 [2022-01-18 15:31:54,026 INFO L226 Difference]: Without dead ends: 192 [2022-01-18 15:31:54,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:31:54,026 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:54,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 239 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:31:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-18 15:31:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 113. [2022-01-18 15:31:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 2.4017857142857144) internal successors, (269), 112 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 269 transitions. [2022-01-18 15:31:54,028 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 269 transitions. Word has length 16 [2022-01-18 15:31:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:54,028 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 269 transitions. [2022-01-18 15:31:54,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 269 transitions. [2022-01-18 15:31:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:54,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:54,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:54,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:54,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-01-18 15:31:54,245 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:54,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:54,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1623557141, now seen corresponding path program 110 times [2022-01-18 15:31:54,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:54,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412934269] [2022-01-18 15:31:54,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:54,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:54,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:54,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:54,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412934269] [2022-01-18 15:31:54,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412934269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:54,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705113450] [2022-01-18 15:31:54,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:31:54,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:54,446 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:54,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-18 15:31:54,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:31:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:54,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:54,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:54,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:54,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:31:54,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:54,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:31:54,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:54,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:55,171 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:55,171 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 105 [2022-01-18 15:31:55,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-01-18 15:31:55,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:55,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705113450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:55,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:55,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-01-18 15:31:55,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38860091] [2022-01-18 15:31:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:55,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:55,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:55,209 INFO L87 Difference]: Start difference. First operand 113 states and 269 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:55,672 INFO L93 Difference]: Finished difference Result 201 states and 415 transitions. [2022-01-18 15:31:55,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:55,673 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:55,673 INFO L225 Difference]: With dead ends: 201 [2022-01-18 15:31:55,673 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 15:31:55,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:31:55,673 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 71 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:55,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 165 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 15:31:55,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 115. [2022-01-18 15:31:55,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.4210526315789473) internal successors, (276), 114 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:55,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2022-01-18 15:31:55,675 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 16 [2022-01-18 15:31:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:55,675 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2022-01-18 15:31:55,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2022-01-18 15:31:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:55,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:55,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:55,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-01-18 15:31:55,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:55,876 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:55,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1608096345, now seen corresponding path program 111 times [2022-01-18 15:31:55,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:55,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933757709] [2022-01-18 15:31:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:55,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:55,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:56,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933757709] [2022-01-18 15:31:56,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933757709] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:56,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683169403] [2022-01-18 15:31:56,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:31:56,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:56,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:56,095 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:56,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-18 15:31:56,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:31:56,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:56,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:56,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:56,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:56,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:31:56,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:56,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:31:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:56,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:56,749 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:56,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 106 [2022-01-18 15:31:56,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-01-18 15:31:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:56,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683169403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:56,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:56,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 18 [2022-01-18 15:31:56,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006777506] [2022-01-18 15:31:56,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:56,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:31:56,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:56,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:31:56,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:31:56,788 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:57,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:57,241 INFO L93 Difference]: Finished difference Result 205 states and 419 transitions. [2022-01-18 15:31:57,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:31:57,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:57,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:57,241 INFO L225 Difference]: With dead ends: 205 [2022-01-18 15:31:57,241 INFO L226 Difference]: Without dead ends: 191 [2022-01-18 15:31:57,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:31:57,242 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:57,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 193 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:57,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-18 15:31:57,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 115. [2022-01-18 15:31:57,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.4210526315789473) internal successors, (276), 114 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:57,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2022-01-18 15:31:57,243 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 16 [2022-01-18 15:31:57,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:57,243 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2022-01-18 15:31:57,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2022-01-18 15:31:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:57,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:57,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:57,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-18 15:31:57,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:57,444 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:57,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:57,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1036641539, now seen corresponding path program 112 times [2022-01-18 15:31:57,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:57,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094247250] [2022-01-18 15:31:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:57,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:57,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094247250] [2022-01-18 15:31:57,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094247250] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424820992] [2022-01-18 15:31:57,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:31:57,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:57,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:57,761 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:57,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-18 15:31:57,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:31:57,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:57,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:57,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:57,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:57,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:31:57,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:31:57,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:31:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:58,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:31:58,576 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:31:58,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:31:58,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:31:58,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:58,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424820992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:31:58,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:31:58,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2022-01-18 15:31:58,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867499633] [2022-01-18 15:31:58,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:31:58,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:31:58,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:31:58,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:31:58,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:31:58,621 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:31:59,127 INFO L93 Difference]: Finished difference Result 195 states and 414 transitions. [2022-01-18 15:31:59,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:31:59,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:31:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:31:59,128 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:31:59,128 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:31:59,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:31:59,128 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 47 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:31:59,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 232 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:31:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:31:59,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 115. [2022-01-18 15:31:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 2.4210526315789473) internal successors, (276), 114 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:59,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 276 transitions. [2022-01-18 15:31:59,130 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 276 transitions. Word has length 16 [2022-01-18 15:31:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:31:59,130 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 276 transitions. [2022-01-18 15:31:59,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:31:59,130 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 276 transitions. [2022-01-18 15:31:59,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:31:59,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:31:59,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:31:59,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-18 15:31:59,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:59,330 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:31:59,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:31:59,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1901575911, now seen corresponding path program 113 times [2022-01-18 15:31:59,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:31:59,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902201810] [2022-01-18 15:31:59,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:31:59,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:31:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:31:59,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:59,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:31:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902201810] [2022-01-18 15:31:59,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902201810] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:31:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067061505] [2022-01-18 15:31:59,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:31:59,544 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:31:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:31:59,544 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:31:59,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-18 15:31:59,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:31:59,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:31:59,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:31:59,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:31:59,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2022-01-18 15:31:59,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2022-01-18 15:31:59,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:31:59,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:00,280 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:00,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:32:00,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:32:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:00,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067061505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:00,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:00,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:32:00,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369671485] [2022-01-18 15:32:00,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:00,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:00,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:00,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:00,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:00,318 INFO L87 Difference]: Start difference. First operand 115 states and 276 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:00,766 INFO L93 Difference]: Finished difference Result 191 states and 410 transitions. [2022-01-18 15:32:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:00,766 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:00,766 INFO L225 Difference]: With dead ends: 191 [2022-01-18 15:32:00,766 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:32:00,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:00,767 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:00,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 206 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:00,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:32:00,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 121. [2022-01-18 15:32:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:00,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:00,768 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:00,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:00,768 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:00,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:00,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:00,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:00,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:00,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-18 15:32:00,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-18 15:32:00,969 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:00,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:00,969 INFO L85 PathProgramCache]: Analyzing trace with hash -780851435, now seen corresponding path program 114 times [2022-01-18 15:32:00,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:00,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25353059] [2022-01-18 15:32:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:00,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:01,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:01,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25353059] [2022-01-18 15:32:01,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25353059] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:01,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665915464] [2022-01-18 15:32:01,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:01,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:01,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:01,153 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:01,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-18 15:32:01,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:01,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:01,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:01,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:01,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:32:01,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:32:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:01,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:01,911 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:01,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:32:01,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:32:01,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:01,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665915464] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:01,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:01,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:32:01,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659614584] [2022-01-18 15:32:01,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:01,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:01,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:01,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:01,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:01,952 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:02,545 INFO L93 Difference]: Finished difference Result 221 states and 458 transitions. [2022-01-18 15:32:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:32:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:02,545 INFO L225 Difference]: With dead ends: 221 [2022-01-18 15:32:02,545 INFO L226 Difference]: Without dead ends: 207 [2022-01-18 15:32:02,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:02,545 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:02,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 200 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:02,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-18 15:32:02,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 121. [2022-01-18 15:32:02,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:02,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:02,547 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:02,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:02,547 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:02,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:02,547 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:02,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:02,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:02,548 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:02,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:02,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-01-18 15:32:02,759 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:02,759 INFO L85 PathProgramCache]: Analyzing trace with hash -796312231, now seen corresponding path program 115 times [2022-01-18 15:32:02,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:02,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232846042] [2022-01-18 15:32:02,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:02,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:02,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232846042] [2022-01-18 15:32:02,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232846042] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:02,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300285690] [2022-01-18 15:32:02,951 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:02,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:02,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:02,952 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:02,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-18 15:32:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:02,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:03,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 98 [2022-01-18 15:32:03,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 80 [2022-01-18 15:32:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:03,659 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:03,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:03,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:03,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300285690] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:03,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:03,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:32:03,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228251722] [2022-01-18 15:32:03,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:03,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:03,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:03,696 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:04,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:04,131 INFO L93 Difference]: Finished difference Result 197 states and 422 transitions. [2022-01-18 15:32:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:04,131 INFO L225 Difference]: With dead ends: 197 [2022-01-18 15:32:04,131 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 15:32:04,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:04,132 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 50 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 176 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 15:32:04,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 119. [2022-01-18 15:32:04,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.4491525423728815) internal successors, (289), 118 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:04,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 289 transitions. [2022-01-18 15:32:04,133 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 289 transitions. Word has length 16 [2022-01-18 15:32:04,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:04,133 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 289 transitions. [2022-01-18 15:32:04,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:04,134 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 289 transitions. [2022-01-18 15:32:04,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:04,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:04,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:04,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:04,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-01-18 15:32:04,343 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:04,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:04,343 INFO L85 PathProgramCache]: Analyzing trace with hash 294859721, now seen corresponding path program 116 times [2022-01-18 15:32:04,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:04,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058807590] [2022-01-18 15:32:04,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:04,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:04,549 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:04,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:04,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058807590] [2022-01-18 15:32:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058807590] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:04,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742881959] [2022-01-18 15:32:04,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:04,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:04,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:04,551 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:04,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-18 15:32:04,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:04,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:04,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:04,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:04,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:04,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:04,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:05,253 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:05,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:32:05,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:32:05,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:05,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742881959] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:05,291 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:05,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 17 [2022-01-18 15:32:05,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143542933] [2022-01-18 15:32:05,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:05,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:05,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:05,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:05,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:05,292 INFO L87 Difference]: Start difference. First operand 119 states and 289 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:05,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:05,885 INFO L93 Difference]: Finished difference Result 181 states and 386 transitions. [2022-01-18 15:32:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:32:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:05,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:05,885 INFO L225 Difference]: With dead ends: 181 [2022-01-18 15:32:05,885 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 15:32:05,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:32:05,886 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:05,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 106 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:32:05,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 15:32:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 119. [2022-01-18 15:32:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.4491525423728815) internal successors, (289), 118 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:05,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 289 transitions. [2022-01-18 15:32:05,887 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 289 transitions. Word has length 16 [2022-01-18 15:32:05,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:05,887 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 289 transitions. [2022-01-18 15:32:05,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:05,888 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 289 transitions. [2022-01-18 15:32:05,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:05,888 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:05,888 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:05,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-18 15:32:06,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-01-18 15:32:06,088 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:06,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash 279398925, now seen corresponding path program 117 times [2022-01-18 15:32:06,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:06,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390278365] [2022-01-18 15:32:06,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:06,089 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:06,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:06,273 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390278365] [2022-01-18 15:32:06,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390278365] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:06,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356342636] [2022-01-18 15:32:06,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:06,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:06,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:06,274 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:06,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-18 15:32:06,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:06,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:32:06,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:06,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-01-18 15:32:06,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-01-18 15:32:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:06,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:07,726 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:07,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:07,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:07,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356342636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:07,766 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:07,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-18 15:32:07,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760247135] [2022-01-18 15:32:07,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:07,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:32:07,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:32:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:07,767 INFO L87 Difference]: Start difference. First operand 119 states and 289 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:08,981 INFO L93 Difference]: Finished difference Result 197 states and 425 transitions. [2022-01-18 15:32:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:32:08,982 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:08,982 INFO L225 Difference]: With dead ends: 197 [2022-01-18 15:32:08,982 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:32:08,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:32:08,982 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 49 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:08,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 162 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 368 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-18 15:32:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:32:08,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 121. [2022-01-18 15:32:08,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.475) internal successors, (297), 120 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2022-01-18 15:32:08,984 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 16 [2022-01-18 15:32:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:08,984 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2022-01-18 15:32:08,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2022-01-18 15:32:08,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:08,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:08,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:09,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:09,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-01-18 15:32:09,201 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:09,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:09,201 INFO L85 PathProgramCache]: Analyzing trace with hash -292055881, now seen corresponding path program 118 times [2022-01-18 15:32:09,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:09,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538791934] [2022-01-18 15:32:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:09,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:09,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:09,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538791934] [2022-01-18 15:32:09,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538791934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:09,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437108067] [2022-01-18 15:32:09,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:09,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:09,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:09,441 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-18 15:32:09,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:09,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:09,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:09,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:09,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:09,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:32:09,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:09,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:32:09,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:09,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:10,182 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:10,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:32:10,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:32:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:32:10,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437108067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:10,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:10,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 19 [2022-01-18 15:32:10,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603384692] [2022-01-18 15:32:10,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:10,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:32:10,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:10,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:32:10,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:10,225 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:10,784 INFO L93 Difference]: Finished difference Result 165 states and 363 transitions. [2022-01-18 15:32:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:32:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:10,785 INFO L225 Difference]: With dead ends: 165 [2022-01-18 15:32:10,785 INFO L226 Difference]: Without dead ends: 147 [2022-01-18 15:32:10,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:32:10,785 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:10,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 160 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-18 15:32:10,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2022-01-18 15:32:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:10,787 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:10,790 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:10,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:10,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:10,791 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:10,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:11,007 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash -717832811, now seen corresponding path program 119 times [2022-01-18 15:32:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673557317] [2022-01-18 15:32:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:11,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:11,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673557317] [2022-01-18 15:32:11,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673557317] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:11,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551001104] [2022-01-18 15:32:11,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:11,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:11,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:11,189 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:11,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-18 15:32:11,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:11,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:11,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:11,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:11,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:11,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:11,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:11,904 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:11,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:32:11,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:32:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:11,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551001104] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:11,935 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:11,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:11,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436435240] [2022-01-18 15:32:11,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:11,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:11,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:11,935 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:12,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:12,610 INFO L93 Difference]: Finished difference Result 228 states and 477 transitions. [2022-01-18 15:32:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:32:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:12,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:12,610 INFO L225 Difference]: With dead ends: 228 [2022-01-18 15:32:12,610 INFO L226 Difference]: Without dead ends: 214 [2022-01-18 15:32:12,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:12,611 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:12,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 194 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-18 15:32:12,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 126. [2022-01-18 15:32:12,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.504) internal successors, (313), 125 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:12,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2022-01-18 15:32:12,612 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 16 [2022-01-18 15:32:12,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:12,612 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2022-01-18 15:32:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:12,613 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2022-01-18 15:32:12,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:12,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:12,613 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:12,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:12,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:12,813 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:12,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:12,813 INFO L85 PathProgramCache]: Analyzing trace with hash -733293607, now seen corresponding path program 120 times [2022-01-18 15:32:12,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:12,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621301290] [2022-01-18 15:32:12,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:12,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:12,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:13,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621301290] [2022-01-18 15:32:13,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621301290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:13,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692739371] [2022-01-18 15:32:13,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:13,031 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:13,032 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:13,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-18 15:32:13,054 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:13,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:13,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:13,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:13,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 117 [2022-01-18 15:32:13,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 93 [2022-01-18 15:32:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:13,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:13,788 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:13,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:32:13,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:32:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:13,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692739371] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:13,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:13,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:13,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871814920] [2022-01-18 15:32:13,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:13,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:13,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:13,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:13,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:13,818 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:14,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:14,498 INFO L93 Difference]: Finished difference Result 232 states and 483 transitions. [2022-01-18 15:32:14,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:32:14,499 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:14,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:14,499 INFO L225 Difference]: With dead ends: 232 [2022-01-18 15:32:14,499 INFO L226 Difference]: Without dead ends: 218 [2022-01-18 15:32:14,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:14,500 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 76 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:14,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 223 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:32:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-18 15:32:14,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 126. [2022-01-18 15:32:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.504) internal successors, (313), 125 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2022-01-18 15:32:14,501 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 16 [2022-01-18 15:32:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:14,501 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2022-01-18 15:32:14,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2022-01-18 15:32:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:14,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:14,502 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:14,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-01-18 15:32:14,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:14,702 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:14,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1304748413, now seen corresponding path program 121 times [2022-01-18 15:32:14,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:14,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697112834] [2022-01-18 15:32:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:14,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:14,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:14,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:14,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697112834] [2022-01-18 15:32:14,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697112834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:14,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372527119] [2022-01-18 15:32:14,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:14,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:14,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:14,883 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:14,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-18 15:32:14,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:14,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:14,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:15,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:15,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:15,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:15,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:15,759 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:15,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:32:15,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:32:15,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:15,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372527119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:15,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:15,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:15,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378922540] [2022-01-18 15:32:15,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:15,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:15,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:15,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:15,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:15,789 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:16,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:16,428 INFO L93 Difference]: Finished difference Result 217 states and 454 transitions. [2022-01-18 15:32:16,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:32:16,428 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:16,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:16,428 INFO L225 Difference]: With dead ends: 217 [2022-01-18 15:32:16,428 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 15:32:16,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:16,429 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:16,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 227 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 15:32:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2022-01-18 15:32:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4878048780487805) internal successors, (306), 123 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:16,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 306 transitions. [2022-01-18 15:32:16,430 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 306 transitions. Word has length 16 [2022-01-18 15:32:16,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:16,431 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 306 transitions. [2022-01-18 15:32:16,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:16,431 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 306 transitions. [2022-01-18 15:32:16,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:16,431 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:16,431 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:16,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:16,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:16,631 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:16,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:16,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1839978215, now seen corresponding path program 122 times [2022-01-18 15:32:16,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:16,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66624510] [2022-01-18 15:32:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:16,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:16,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66624510] [2022-01-18 15:32:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66624510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668382098] [2022-01-18 15:32:16,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:16,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:16,915 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:16,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-18 15:32:16,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:16,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:16,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:17,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 111 [2022-01-18 15:32:17,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-01-18 15:32:17,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:17,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:17,929 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:17,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:32:17,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:32:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:17,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668382098] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:17,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:17,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-18 15:32:17,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949712490] [2022-01-18 15:32:17,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:17,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:32:17,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:17,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:32:17,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:17,961 INFO L87 Difference]: Start difference. First operand 124 states and 306 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:18,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:18,378 INFO L93 Difference]: Finished difference Result 197 states and 418 transitions. [2022-01-18 15:32:18,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:18,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:18,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:18,379 INFO L225 Difference]: With dead ends: 197 [2022-01-18 15:32:18,379 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 15:32:18,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:18,379 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:18,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 234 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 507 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-01-18 15:32:18,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 15:32:18,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 119. [2022-01-18 15:32:18,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.440677966101695) internal successors, (288), 118 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:18,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 288 transitions. [2022-01-18 15:32:18,381 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 288 transitions. Word has length 16 [2022-01-18 15:32:18,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:18,381 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 288 transitions. [2022-01-18 15:32:18,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:18,381 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 288 transitions. [2022-01-18 15:32:18,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:18,381 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:18,381 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:18,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-18 15:32:18,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:18,588 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:18,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:18,588 INFO L85 PathProgramCache]: Analyzing trace with hash -986494423, now seen corresponding path program 123 times [2022-01-18 15:32:18,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:18,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136129493] [2022-01-18 15:32:18,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:18,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:18,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:18,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136129493] [2022-01-18 15:32:18,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136129493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:18,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259719726] [2022-01-18 15:32:18,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:18,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:18,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:18,772 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:18,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-18 15:32:18,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:18,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:18,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:18,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2022-01-18 15:32:18,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2022-01-18 15:32:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:19,519 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:19,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:32:19,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:32:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:19,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259719726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:19,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:19,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:19,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616137035] [2022-01-18 15:32:19,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:19,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:19,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:19,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:19,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:19,545 INFO L87 Difference]: Start difference. First operand 119 states and 288 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:19,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:19,959 INFO L93 Difference]: Finished difference Result 225 states and 484 transitions. [2022-01-18 15:32:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:32:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:19,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:19,960 INFO L225 Difference]: With dead ends: 225 [2022-01-18 15:32:19,960 INFO L226 Difference]: Without dead ends: 211 [2022-01-18 15:32:19,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:19,960 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:19,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 178 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-18 15:32:19,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 124. [2022-01-18 15:32:19,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4878048780487805) internal successors, (306), 123 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 306 transitions. [2022-01-18 15:32:19,962 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 306 transitions. Word has length 16 [2022-01-18 15:32:19,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:19,962 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 306 transitions. [2022-01-18 15:32:19,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:19,962 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 306 transitions. [2022-01-18 15:32:19,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:19,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:19,963 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:19,978 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-18 15:32:20,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:20,163 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:20,163 INFO L85 PathProgramCache]: Analyzing trace with hash 134230053, now seen corresponding path program 124 times [2022-01-18 15:32:20,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:20,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088077880] [2022-01-18 15:32:20,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:20,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:20,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088077880] [2022-01-18 15:32:20,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088077880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043187909] [2022-01-18 15:32:20,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:20,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:20,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:20,359 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:20,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-18 15:32:20,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:20,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:20,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:20,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 97 [2022-01-18 15:32:20,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 79 [2022-01-18 15:32:20,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:20,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:21,089 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:21,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:32:21,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:32:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:21,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043187909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:21,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:21,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:21,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978292587] [2022-01-18 15:32:21,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:21,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:21,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:21,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:21,117 INFO L87 Difference]: Start difference. First operand 124 states and 306 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:21,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:21,669 INFO L93 Difference]: Finished difference Result 255 states and 533 transitions. [2022-01-18 15:32:21,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:32:21,670 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:21,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:21,670 INFO L225 Difference]: With dead ends: 255 [2022-01-18 15:32:21,670 INFO L226 Difference]: Without dead ends: 241 [2022-01-18 15:32:21,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:32:21,670 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:21,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 183 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:21,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-18 15:32:21,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 124. [2022-01-18 15:32:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4878048780487805) internal successors, (306), 123 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 306 transitions. [2022-01-18 15:32:21,672 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 306 transitions. Word has length 16 [2022-01-18 15:32:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:21,672 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 306 transitions. [2022-01-18 15:32:21,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:21,673 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 306 transitions. [2022-01-18 15:32:21,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:21,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:21,673 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:21,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2022-01-18 15:32:21,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:21,876 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 118769257, now seen corresponding path program 125 times [2022-01-18 15:32:21,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:21,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646370736] [2022-01-18 15:32:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:21,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:22,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:22,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646370736] [2022-01-18 15:32:22,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646370736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:22,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925502324] [2022-01-18 15:32:22,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:22,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:22,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:22,030 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:22,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-18 15:32:22,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:22,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:22,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:22,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:22,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:32:22,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:32:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:22,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:22,696 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:22,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:22,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:22,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925502324] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:22,722 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:22,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761855741] [2022-01-18 15:32:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:22,722 INFO L87 Difference]: Start difference. First operand 124 states and 306 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:23,208 INFO L93 Difference]: Finished difference Result 225 states and 487 transitions. [2022-01-18 15:32:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:32:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:23,209 INFO L225 Difference]: With dead ends: 225 [2022-01-18 15:32:23,209 INFO L226 Difference]: Without dead ends: 211 [2022-01-18 15:32:23,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:23,209 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 206 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:23,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-18 15:32:23,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 122. [2022-01-18 15:32:23,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:23,211 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:23,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:23,211 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:23,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:23,211 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:23,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:23,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:23,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:23,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:23,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-01-18 15:32:23,412 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:23,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1209941209, now seen corresponding path program 126 times [2022-01-18 15:32:23,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:23,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888030498] [2022-01-18 15:32:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:23,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:23,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888030498] [2022-01-18 15:32:23,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888030498] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:23,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289368169] [2022-01-18 15:32:23,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:23,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:23,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:23,598 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:23,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-18 15:32:23,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:23,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:23,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:23,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 118 [2022-01-18 15:32:23,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 94 [2022-01-18 15:32:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:23,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:24,355 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:24,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:24,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:24,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289368169] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:24,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:24,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:24,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105853652] [2022-01-18 15:32:24,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:24,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:24,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:24,386 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:25,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:25,005 INFO L93 Difference]: Finished difference Result 206 states and 438 transitions. [2022-01-18 15:32:25,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:32:25,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:25,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:25,006 INFO L225 Difference]: With dead ends: 206 [2022-01-18 15:32:25,006 INFO L226 Difference]: Without dead ends: 192 [2022-01-18 15:32:25,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:32:25,007 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:25,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 157 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:25,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-18 15:32:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2022-01-18 15:32:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:25,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:25,009 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:25,009 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:25,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:25,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:25,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:25,009 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:25,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:25,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-01-18 15:32:25,223 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:25,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:25,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1194480413, now seen corresponding path program 127 times [2022-01-18 15:32:25,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:25,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699444689] [2022-01-18 15:32:25,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:25,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:25,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:25,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699444689] [2022-01-18 15:32:25,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699444689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:25,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206935983] [2022-01-18 15:32:25,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:25,478 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:25,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:25,479 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:25,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-18 15:32:25,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:25,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:25,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:25,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:25,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:32:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:25,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:32:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:25,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:26,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:26,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:32:26,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:32:26,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:26,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206935983] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:26,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:26,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:32:26,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909363288] [2022-01-18 15:32:26,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:26,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:32:26,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:26,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:32:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:26,269 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:26,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:26,801 INFO L93 Difference]: Finished difference Result 165 states and 376 transitions. [2022-01-18 15:32:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:26,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:26,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:26,802 INFO L225 Difference]: With dead ends: 165 [2022-01-18 15:32:26,802 INFO L226 Difference]: Without dead ends: 151 [2022-01-18 15:32:26,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:32:26,802 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:26,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 130 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 455 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:32:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-18 15:32:26,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 122. [2022-01-18 15:32:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:26,804 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:26,804 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:26,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:26,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:26,804 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:26,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:27,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-01-18 15:32:27,005 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash 623025607, now seen corresponding path program 128 times [2022-01-18 15:32:27,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:27,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314039490] [2022-01-18 15:32:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:27,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:27,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:27,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:27,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314039490] [2022-01-18 15:32:27,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314039490] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:27,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278221497] [2022-01-18 15:32:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:27,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:27,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:27,160 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:27,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-18 15:32:27,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:27,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:27,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:27,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:27,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 108 [2022-01-18 15:32:27,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 88 [2022-01-18 15:32:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:27,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:27,957 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:27,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 15:32:27,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 15:32:27,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:27,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278221497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:27,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:27,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:27,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946178887] [2022-01-18 15:32:27,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:27,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:27,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:27,989 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:28,490 INFO L93 Difference]: Finished difference Result 178 states and 393 transitions. [2022-01-18 15:32:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:28,491 INFO L225 Difference]: With dead ends: 178 [2022-01-18 15:32:28,491 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 15:32:28,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:28,492 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:28,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 132 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 15:32:28,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 122. [2022-01-18 15:32:28,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:28,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:28,494 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:28,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:28,494 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:28,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:28,494 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:28,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:28,494 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:28,494 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:28,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:28,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:28,695 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:28,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:28,695 INFO L85 PathProgramCache]: Analyzing trace with hash 197248677, now seen corresponding path program 129 times [2022-01-18 15:32:28,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:28,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913226259] [2022-01-18 15:32:28,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:28,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:28,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:28,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:28,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913226259] [2022-01-18 15:32:28,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913226259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:28,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892064080] [2022-01-18 15:32:28,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:28,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:28,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:28,861 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:28,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-18 15:32:28,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:28,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:28,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:28,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:28,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:28,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:29,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:29,608 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:29,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:32:29,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:32:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:29,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892064080] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:29,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:29,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:29,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558916518] [2022-01-18 15:32:29,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:29,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:29,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:29,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:29,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:29,639 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:29,877 INFO L93 Difference]: Finished difference Result 157 states and 355 transitions. [2022-01-18 15:32:29,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:29,878 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:29,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:29,878 INFO L225 Difference]: With dead ends: 157 [2022-01-18 15:32:29,878 INFO L226 Difference]: Without dead ends: 150 [2022-01-18 15:32:29,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:29,879 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:29,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 98 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:32:29,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-18 15:32:29,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2022-01-18 15:32:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:29,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:29,880 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:29,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:29,880 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:29,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:29,880 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:29,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:29,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:29,881 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:29,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-01-18 15:32:30,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-01-18 15:32:30,081 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:30,081 INFO L85 PathProgramCache]: Analyzing trace with hash 181787881, now seen corresponding path program 130 times [2022-01-18 15:32:30,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:30,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347084945] [2022-01-18 15:32:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:30,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:30,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347084945] [2022-01-18 15:32:30,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347084945] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:30,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998934439] [2022-01-18 15:32:30,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:30,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:30,254 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:30,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-18 15:32:30,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:30,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:30,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:30,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:30,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2022-01-18 15:32:30,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 82 [2022-01-18 15:32:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:30,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:31,009 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:31,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:32:31,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:32:31,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:31,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998934439] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:31,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:31,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:31,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596043797] [2022-01-18 15:32:31,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:31,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:31,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:31,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:31,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:31,031 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:31,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:31,275 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2022-01-18 15:32:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:31,276 INFO L225 Difference]: With dead ends: 159 [2022-01-18 15:32:31,276 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 15:32:31,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:31,276 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:31,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:31,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 15:32:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 122. [2022-01-18 15:32:31,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:31,278 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:31,278 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:31,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:31,278 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:31,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:31,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:31,287 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:31,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-18 15:32:31,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:31,488 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:31,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:31,488 INFO L85 PathProgramCache]: Analyzing trace with hash -389666925, now seen corresponding path program 131 times [2022-01-18 15:32:31,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:31,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225135036] [2022-01-18 15:32:31,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:31,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:31,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:31,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225135036] [2022-01-18 15:32:31,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225135036] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:31,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450311693] [2022-01-18 15:32:31,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:31,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:31,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:31,672 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:31,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-18 15:32:31,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:31,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:31,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:31,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:31,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:32:31,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:32:31,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:31,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:32,470 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:32,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:32:32,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:32:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:32,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450311693] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:32,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:32,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:32,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395092502] [2022-01-18 15:32:32,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:32,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:32,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:32,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:32,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:32,490 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:32,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:32,701 INFO L93 Difference]: Finished difference Result 146 states and 336 transitions. [2022-01-18 15:32:32,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:32,702 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:32,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:32,702 INFO L225 Difference]: With dead ends: 146 [2022-01-18 15:32:32,702 INFO L226 Difference]: Without dead ends: 139 [2022-01-18 15:32:32,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:32,702 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:32,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 113 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:32:32,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-18 15:32:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2022-01-18 15:32:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.4710743801652892) internal successors, (299), 121 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2022-01-18 15:32:32,704 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 16 [2022-01-18 15:32:32,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:32,704 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2022-01-18 15:32:32,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:32,704 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2022-01-18 15:32:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:32,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:32,704 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:32,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-18 15:32:32,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:32,905 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:32,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2073004305, now seen corresponding path program 132 times [2022-01-18 15:32:32,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:32,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736165617] [2022-01-18 15:32:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:32,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:32,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736165617] [2022-01-18 15:32:32,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736165617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474156800] [2022-01-18 15:32:32,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:32,970 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:32,971 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:32,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-18 15:32:32,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:32,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:32,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:32:32,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:33,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:32:33,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:33,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:32:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:33,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:33,268 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:33,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:32:33,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:32:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:33,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474156800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:33,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:33,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 15:32:33,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359606597] [2022-01-18 15:32:33,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:33,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:33,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:33,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:33,279 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:33,413 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2022-01-18 15:32:33,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:32:33,413 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:33,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:33,414 INFO L225 Difference]: With dead ends: 165 [2022-01-18 15:32:33,414 INFO L226 Difference]: Without dead ends: 165 [2022-01-18 15:32:33,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:33,414 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:33,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 105 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 151 Invalid, 0 Unknown, 164 Unchecked, 0.0s Time] [2022-01-18 15:32:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-18 15:32:33,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 121. [2022-01-18 15:32:33,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:33,415 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:33,416 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:33,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:33,416 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:33,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:33,416 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:33,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:33,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:33,616 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:33,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash -924896727, now seen corresponding path program 133 times [2022-01-18 15:32:33,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:33,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199296380] [2022-01-18 15:32:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:33,617 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:33,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199296380] [2022-01-18 15:32:33,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199296380] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:33,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162855559] [2022-01-18 15:32:33,833 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:33,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:33,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:33,834 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:33,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-01-18 15:32:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:33,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:33,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:33,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:32:34,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:32:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:34,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:34,637 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:34,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:32:34,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:32:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:34,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162855559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:34,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:34,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:34,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833385410] [2022-01-18 15:32:34,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:34,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:34,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:34,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:34,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:34,658 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:34,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:34,886 INFO L93 Difference]: Finished difference Result 143 states and 330 transitions. [2022-01-18 15:32:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:34,886 INFO L225 Difference]: With dead ends: 143 [2022-01-18 15:32:34,886 INFO L226 Difference]: Without dead ends: 136 [2022-01-18 15:32:34,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:34,887 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:34,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 119 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:32:34,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-18 15:32:34,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 121. [2022-01-18 15:32:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:34,888 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:34,888 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:34,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:34,889 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:34,889 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:34,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-01-18 15:32:35,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:35,103 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:35,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash -997293149, now seen corresponding path program 134 times [2022-01-18 15:32:35,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:35,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042451138] [2022-01-18 15:32:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:35,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:35,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042451138] [2022-01-18 15:32:35,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042451138] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:35,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713577330] [2022-01-18 15:32:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:35,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:35,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:35,178 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-01-18 15:32:35,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-01-18 15:32:35,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:35,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:35,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:32:35,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:35,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:32:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:35,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:35,496 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:35,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-18 15:32:35,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-18 15:32:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713577330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:35,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:35,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 15:32:35,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925610448] [2022-01-18 15:32:35,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:32:35,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:32:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:35,506 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:35,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:35,546 INFO L93 Difference]: Finished difference Result 136 states and 323 transitions. [2022-01-18 15:32:35,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-18 15:32:35,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:35,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:35,547 INFO L225 Difference]: With dead ends: 136 [2022-01-18 15:32:35,547 INFO L226 Difference]: Without dead ends: 136 [2022-01-18 15:32:35,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:35,547 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:35,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 48 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 6 Unchecked, 0.0s Time] [2022-01-18 15:32:35,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-18 15:32:35,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 118. [2022-01-18 15:32:35,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.452991452991453) internal successors, (287), 117 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:35,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2022-01-18 15:32:35,549 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 16 [2022-01-18 15:32:35,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:35,549 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2022-01-18 15:32:35,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:35,549 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2022-01-18 15:32:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:35,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:35,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:35,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-01-18 15:32:35,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-01-18 15:32:35,750 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:35,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1574347883, now seen corresponding path program 135 times [2022-01-18 15:32:35,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:35,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878464449] [2022-01-18 15:32:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:35,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:35,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:35,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:35,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878464449] [2022-01-18 15:32:35,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878464449] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:35,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130997265] [2022-01-18 15:32:35,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:35,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:35,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:35,923 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:35,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-01-18 15:32:35,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:35,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:35,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:36,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:36,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:36,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:36,694 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:36,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:36,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:36,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:36,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130997265] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:36,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:36,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:36,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092252556] [2022-01-18 15:32:36,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:36,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:36,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:36,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:36,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:36,703 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:37,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:37,009 INFO L93 Difference]: Finished difference Result 195 states and 445 transitions. [2022-01-18 15:32:37,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:37,009 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:37,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:37,009 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:32:37,009 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 15:32:37,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:37,010 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:37,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 106 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 15:32:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 121. [2022-01-18 15:32:37,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:37,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:37,011 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:37,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:37,011 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:37,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:37,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:37,012 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:37,012 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:37,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2022-01-18 15:32:37,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-01-18 15:32:37,212 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:37,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1589808679, now seen corresponding path program 136 times [2022-01-18 15:32:37,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:37,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175299470] [2022-01-18 15:32:37,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:37,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:37,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:37,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:37,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175299470] [2022-01-18 15:32:37,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175299470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:37,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172838799] [2022-01-18 15:32:37,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:37,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:37,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:37,454 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:37,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-01-18 15:32:37,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:37,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:37,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:37,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:37,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:32:37,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:32:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:37,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:38,293 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:38,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:32:38,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:32:38,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:38,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172838799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:38,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:38,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:32:38,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590210643] [2022-01-18 15:32:38,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:38,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:32:38,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:32:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:32:38,302 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:38,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:38,716 INFO L93 Difference]: Finished difference Result 197 states and 447 transitions. [2022-01-18 15:32:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:38,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:38,717 INFO L225 Difference]: With dead ends: 197 [2022-01-18 15:32:38,717 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 15:32:38,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:32:38,717 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:38,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 105 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 15:32:38,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 121. [2022-01-18 15:32:38,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.466666666666667) internal successors, (296), 120 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:38,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 296 transitions. [2022-01-18 15:32:38,719 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 296 transitions. Word has length 16 [2022-01-18 15:32:38,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:38,719 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 296 transitions. [2022-01-18 15:32:38,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 296 transitions. [2022-01-18 15:32:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:38,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:38,720 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:38,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:38,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-01-18 15:32:38,920 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:38,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:38,920 INFO L85 PathProgramCache]: Analyzing trace with hash 2133703811, now seen corresponding path program 137 times [2022-01-18 15:32:38,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:38,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430009233] [2022-01-18 15:32:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:38,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:39,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:39,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:39,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430009233] [2022-01-18 15:32:39,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430009233] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:39,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079678559] [2022-01-18 15:32:39,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:39,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:39,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:39,117 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:39,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-01-18 15:32:39,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:39,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:39,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:39,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:39,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 110 [2022-01-18 15:32:39,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 90 [2022-01-18 15:32:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:39,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:39,923 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:39,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:32:39,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:32:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:39,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079678559] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:39,932 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:39,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-01-18 15:32:39,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455524754] [2022-01-18 15:32:39,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:39,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:39,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:39,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:39,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:39,932 INFO L87 Difference]: Start difference. First operand 121 states and 296 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:40,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:40,230 INFO L93 Difference]: Finished difference Result 184 states and 426 transitions. [2022-01-18 15:32:40,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:40,230 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:40,230 INFO L225 Difference]: With dead ends: 184 [2022-01-18 15:32:40,230 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:32:40,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:40,231 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:40,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 109 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:32:40,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 120. [2022-01-18 15:32:40,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.46218487394958) internal successors, (293), 119 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:40,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 293 transitions. [2022-01-18 15:32:40,232 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 293 transitions. Word has length 16 [2022-01-18 15:32:40,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:40,232 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 293 transitions. [2022-01-18 15:32:40,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:40,233 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 293 transitions. [2022-01-18 15:32:40,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:40,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:40,233 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:40,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-01-18 15:32:40,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-01-18 15:32:40,447 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:40,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:40,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1598474009, now seen corresponding path program 138 times [2022-01-18 15:32:40,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:40,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53337736] [2022-01-18 15:32:40,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:40,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:40,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53337736] [2022-01-18 15:32:40,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53337736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:40,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944334182] [2022-01-18 15:32:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:40,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:40,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:40,709 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:40,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-01-18 15:32:40,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:32:40,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:40,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:41,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 103 [2022-01-18 15:32:41,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 83 [2022-01-18 15:32:41,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:41,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:41,856 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:41,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:32:41,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:32:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:41,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944334182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:41,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:41,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-18 15:32:41,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011556490] [2022-01-18 15:32:41,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:41,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:32:41,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:41,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:32:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:41,869 INFO L87 Difference]: Start difference. First operand 120 states and 293 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:41,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:41,997 INFO L93 Difference]: Finished difference Result 164 states and 396 transitions. [2022-01-18 15:32:41,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:41,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:41,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:41,997 INFO L225 Difference]: With dead ends: 164 [2022-01-18 15:32:41,997 INFO L226 Difference]: Without dead ends: 157 [2022-01-18 15:32:41,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:41,998 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 29 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:41,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 104 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 216 Invalid, 0 Unknown, 29 Unchecked, 0.1s Time] [2022-01-18 15:32:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-18 15:32:41,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 119. [2022-01-18 15:32:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.457627118644068) internal successors, (290), 118 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:41,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 290 transitions. [2022-01-18 15:32:41,999 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 290 transitions. Word has length 16 [2022-01-18 15:32:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:41,999 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 290 transitions. [2022-01-18 15:32:41,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 290 transitions. [2022-01-18 15:32:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-18 15:32:42,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:42,000 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:42,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:42,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-01-18 15:32:42,200 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1014656377, now seen corresponding path program 139 times [2022-01-18 15:32:42,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:42,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654506003] [2022-01-18 15:32:42,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:42,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:42,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654506003] [2022-01-18 15:32:42,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654506003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:42,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551564996] [2022-01-18 15:32:42,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:42,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:42,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:42,432 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:42,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-01-18 15:32:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:42,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:32:42,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:42,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 104 [2022-01-18 15:32:42,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:32:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:42,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:43,327 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:43,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 15:32:43,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 15:32:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551564996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:43,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:43,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-18 15:32:43,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834210851] [2022-01-18 15:32:43,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:43,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:32:43,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:43,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:32:43,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:43,336 INFO L87 Difference]: Start difference. First operand 119 states and 290 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:43,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:43,789 INFO L93 Difference]: Finished difference Result 180 states and 417 transitions. [2022-01-18 15:32:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-01-18 15:32:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:43,789 INFO L225 Difference]: With dead ends: 180 [2022-01-18 15:32:43,789 INFO L226 Difference]: Without dead ends: 173 [2022-01-18 15:32:43,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:43,790 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:43,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 106 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:32:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-18 15:32:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 121. [2022-01-18 15:32:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.441666666666667) internal successors, (293), 120 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:43,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 293 transitions. [2022-01-18 15:32:43,791 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 293 transitions. Word has length 16 [2022-01-18 15:32:43,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:43,791 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 293 transitions. [2022-01-18 15:32:43,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 293 transitions. [2022-01-18 15:32:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:43,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:43,792 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:43,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-01-18 15:32:44,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-01-18 15:32:44,007 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:44,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:44,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1665967148, now seen corresponding path program 140 times [2022-01-18 15:32:44,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:44,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949057135] [2022-01-18 15:32:44,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:44,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:44,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:44,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:44,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949057135] [2022-01-18 15:32:44,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949057135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:44,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113884908] [2022-01-18 15:32:44,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:44,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:44,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:44,096 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-01-18 15:32:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:44,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:32:44,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:32:44,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:44,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:44,393 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:44,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:32:44,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:32:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:44,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113884908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:44,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:44,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 15:32:44,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451381011] [2022-01-18 15:32:44,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:44,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:32:44,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:44,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:32:44,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:32:44,408 INFO L87 Difference]: Start difference. First operand 121 states and 293 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:44,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:44,622 INFO L93 Difference]: Finished difference Result 175 states and 412 transitions. [2022-01-18 15:32:44,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:32:44,622 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:44,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:44,623 INFO L225 Difference]: With dead ends: 175 [2022-01-18 15:32:44,623 INFO L226 Difference]: Without dead ends: 175 [2022-01-18 15:32:44,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:32:44,623 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:44,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 86 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 239 Invalid, 0 Unknown, 71 Unchecked, 0.1s Time] [2022-01-18 15:32:44,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-18 15:32:44,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2022-01-18 15:32:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.446280991735537) internal successors, (296), 121 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2022-01-18 15:32:44,625 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 17 [2022-01-18 15:32:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:44,625 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2022-01-18 15:32:44,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:44,625 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2022-01-18 15:32:44,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:44,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:44,625 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:44,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-01-18 15:32:44,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:44,830 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:44,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1896623258, now seen corresponding path program 141 times [2022-01-18 15:32:44,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:44,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132255787] [2022-01-18 15:32:44,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:44,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:44,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:44,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:44,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132255787] [2022-01-18 15:32:44,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132255787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:44,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667587531] [2022-01-18 15:32:44,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:44,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:44,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:44,927 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:44,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-01-18 15:32:44,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:44,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:44,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:44,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:45,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:32:45,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:32:45,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:45,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:45,264 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:45,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:32:45,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:32:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:45,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667587531] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:45,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:45,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:32:45,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698721718] [2022-01-18 15:32:45,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:45,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:32:45,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:45,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:32:45,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:32:45,279 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:45,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:45,454 INFO L93 Difference]: Finished difference Result 158 states and 377 transitions. [2022-01-18 15:32:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:32:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:45,454 INFO L225 Difference]: With dead ends: 158 [2022-01-18 15:32:45,454 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 15:32:45,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:45,455 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:45,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 107 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 328 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2022-01-18 15:32:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 15:32:45,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2022-01-18 15:32:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.4508196721311477) internal successors, (299), 122 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 299 transitions. [2022-01-18 15:32:45,456 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 299 transitions. Word has length 17 [2022-01-18 15:32:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:45,456 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 299 transitions. [2022-01-18 15:32:45,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 299 transitions. [2022-01-18 15:32:45,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:45,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:45,457 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:45,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2022-01-18 15:32:45,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2022-01-18 15:32:45,657 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:45,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:45,657 INFO L85 PathProgramCache]: Analyzing trace with hash 725419556, now seen corresponding path program 142 times [2022-01-18 15:32:45,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:45,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171975998] [2022-01-18 15:32:45,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:45,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:45,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:45,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171975998] [2022-01-18 15:32:45,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171975998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:45,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743454608] [2022-01-18 15:32:45,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:45,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:45,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:45,754 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:45,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-01-18 15:32:45,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:45,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:45,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:45,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:45,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:32:45,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:32:46,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:46,125 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:46,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:32:46,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:46,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:46,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743454608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:46,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:46,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:32:46,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607137075] [2022-01-18 15:32:46,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:46,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:32:46,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:46,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:32:46,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:32:46,144 INFO L87 Difference]: Start difference. First operand 123 states and 299 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:46,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:46,260 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2022-01-18 15:32:46,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:32:46,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:46,260 INFO L225 Difference]: With dead ends: 149 [2022-01-18 15:32:46,260 INFO L226 Difference]: Without dead ends: 140 [2022-01-18 15:32:46,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:46,261 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:46,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 97 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-01-18 15:32:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-18 15:32:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2022-01-18 15:32:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.442622950819672) internal successors, (298), 122 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:46,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 298 transitions. [2022-01-18 15:32:46,262 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 298 transitions. Word has length 17 [2022-01-18 15:32:46,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:46,262 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 298 transitions. [2022-01-18 15:32:46,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:46,262 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 298 transitions. [2022-01-18 15:32:46,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:46,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:46,263 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:46,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-01-18 15:32:46,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:46,478 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1266651114, now seen corresponding path program 143 times [2022-01-18 15:32:46,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:46,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137097855] [2022-01-18 15:32:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:46,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:46,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:46,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137097855] [2022-01-18 15:32:46,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137097855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:46,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661321056] [2022-01-18 15:32:46,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:46,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:46,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:46,580 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:46,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-01-18 15:32:46,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:46,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:46,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:46,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:46,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:32:46,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:32:46,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:46,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:46,888 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:46,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-01-18 15:32:46,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-01-18 15:32:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:46,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661321056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:46,902 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:46,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-01-18 15:32:46,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679678290] [2022-01-18 15:32:46,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:46,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 15:32:46,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:46,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 15:32:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-01-18 15:32:46,903 INFO L87 Difference]: Start difference. First operand 123 states and 298 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:47,078 INFO L93 Difference]: Finished difference Result 153 states and 355 transitions. [2022-01-18 15:32:47,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:32:47,078 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:47,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:47,079 INFO L225 Difference]: With dead ends: 153 [2022-01-18 15:32:47,079 INFO L226 Difference]: Without dead ends: 153 [2022-01-18 15:32:47,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:47,079 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:47,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 103 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:32:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-18 15:32:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 124. [2022-01-18 15:32:47,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4471544715447155) internal successors, (301), 123 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:47,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 301 transitions. [2022-01-18 15:32:47,081 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 301 transitions. Word has length 17 [2022-01-18 15:32:47,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:47,081 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 301 transitions. [2022-01-18 15:32:47,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:47,081 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 301 transitions. [2022-01-18 15:32:47,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:47,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:47,081 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:47,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:47,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:47,297 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:47,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:47,297 INFO L85 PathProgramCache]: Analyzing trace with hash -295150304, now seen corresponding path program 144 times [2022-01-18 15:32:47,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:47,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116314834] [2022-01-18 15:32:47,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:47,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:47,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116314834] [2022-01-18 15:32:47,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116314834] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:47,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235425293] [2022-01-18 15:32:47,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:47,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:47,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:47,403 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:47,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-01-18 15:32:47,425 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:32:47,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:47,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:47,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:47,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:32:47,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:32:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:47,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:47,777 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:47,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:32:47,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:47,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235425293] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:47,796 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:47,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:47,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312341277] [2022-01-18 15:32:47,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:47,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:47,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:47,797 INFO L87 Difference]: Start difference. First operand 124 states and 301 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:48,029 INFO L93 Difference]: Finished difference Result 156 states and 359 transitions. [2022-01-18 15:32:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:32:48,029 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:48,030 INFO L225 Difference]: With dead ends: 156 [2022-01-18 15:32:48,030 INFO L226 Difference]: Without dead ends: 150 [2022-01-18 15:32:48,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:48,030 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:48,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 126 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 300 Invalid, 0 Unknown, 79 Unchecked, 0.1s Time] [2022-01-18 15:32:48,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-18 15:32:48,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 124. [2022-01-18 15:32:48,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.4390243902439024) internal successors, (300), 123 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 300 transitions. [2022-01-18 15:32:48,032 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 300 transitions. Word has length 17 [2022-01-18 15:32:48,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:48,032 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 300 transitions. [2022-01-18 15:32:48,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,032 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 300 transitions. [2022-01-18 15:32:48,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:48,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:48,032 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:48,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-01-18 15:32:48,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:48,232 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:48,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -831880550, now seen corresponding path program 145 times [2022-01-18 15:32:48,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:48,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721408312] [2022-01-18 15:32:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:48,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:48,320 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721408312] [2022-01-18 15:32:48,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721408312] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:48,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126017606] [2022-01-18 15:32:48,320 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:48,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:48,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:48,321 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:48,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-01-18 15:32:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:48,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:48,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:48,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:48,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:48,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:48,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:48,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:48,637 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:48,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:32:48,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:32:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:48,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126017606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:48,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:48,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:48,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571485662] [2022-01-18 15:32:48,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:48,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:48,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:48,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:48,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:48,653 INFO L87 Difference]: Start difference. First operand 124 states and 300 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:48,817 INFO L93 Difference]: Finished difference Result 170 states and 392 transitions. [2022-01-18 15:32:48,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:32:48,817 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:48,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:48,818 INFO L225 Difference]: With dead ends: 170 [2022-01-18 15:32:48,818 INFO L226 Difference]: Without dead ends: 170 [2022-01-18 15:32:48,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:32:48,818 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 43 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:48,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 142 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 263 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-18 15:32:48,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-18 15:32:48,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 125. [2022-01-18 15:32:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.4516129032258065) internal successors, (304), 124 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 304 transitions. [2022-01-18 15:32:48,820 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 304 transitions. Word has length 17 [2022-01-18 15:32:48,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:48,820 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 304 transitions. [2022-01-18 15:32:48,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:48,820 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 304 transitions. [2022-01-18 15:32:48,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:48,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:48,820 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:48,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-01-18 15:32:49,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:49,020 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 87570084, now seen corresponding path program 146 times [2022-01-18 15:32:49,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:49,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392930002] [2022-01-18 15:32:49,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:49,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:49,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:49,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392930002] [2022-01-18 15:32:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392930002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:49,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377325156] [2022-01-18 15:32:49,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:49,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:49,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:49,110 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:49,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-01-18 15:32:49,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:49,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:49,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:49,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:49,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:49,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:49,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:49,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:49,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:49,461 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:49,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:32:49,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:49,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:49,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377325156] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:49,478 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:49,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:49,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867041229] [2022-01-18 15:32:49,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:49,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:49,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:49,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:49,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:49,479 INFO L87 Difference]: Start difference. First operand 125 states and 304 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:49,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:49,963 INFO L93 Difference]: Finished difference Result 187 states and 429 transitions. [2022-01-18 15:32:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:32:49,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:49,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:49,964 INFO L225 Difference]: With dead ends: 187 [2022-01-18 15:32:49,964 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 15:32:49,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:32:49,964 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:49,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 116 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 302 Invalid, 0 Unknown, 130 Unchecked, 0.1s Time] [2022-01-18 15:32:49,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 15:32:49,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2022-01-18 15:32:49,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.4285714285714284) internal successors, (306), 126 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 306 transitions. [2022-01-18 15:32:49,966 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 306 transitions. Word has length 17 [2022-01-18 15:32:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:49,966 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 306 transitions. [2022-01-18 15:32:49,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:49,966 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 306 transitions. [2022-01-18 15:32:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:49,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:49,966 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:49,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-01-18 15:32:50,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-01-18 15:32:50,167 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:50,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash 259465328, now seen corresponding path program 147 times [2022-01-18 15:32:50,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:50,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160739811] [2022-01-18 15:32:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:50,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:50,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160739811] [2022-01-18 15:32:50,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160739811] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:50,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736531810] [2022-01-18 15:32:50,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:50,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:50,304 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:50,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-01-18 15:32:50,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:32:50,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:50,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:50,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:50,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:50,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:50,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:50,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:50,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:50,723 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:50,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:32:50,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:50,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736531810] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:50,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:50,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:50,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337438924] [2022-01-18 15:32:50,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:50,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:50,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:50,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:50,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:50,741 INFO L87 Difference]: Start difference. First operand 127 states and 306 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:51,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:51,383 INFO L93 Difference]: Finished difference Result 174 states and 398 transitions. [2022-01-18 15:32:51,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:32:51,383 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:51,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:51,384 INFO L225 Difference]: With dead ends: 174 [2022-01-18 15:32:51,384 INFO L226 Difference]: Without dead ends: 171 [2022-01-18 15:32:51,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=990, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:32:51,384 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:51,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 120 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 375 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:32:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-18 15:32:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 129. [2022-01-18 15:32:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.4375) internal successors, (312), 128 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:51,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 312 transitions. [2022-01-18 15:32:51,386 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 312 transitions. Word has length 17 [2022-01-18 15:32:51,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:51,386 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 312 transitions. [2022-01-18 15:32:51,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:51,386 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 312 transitions. [2022-01-18 15:32:51,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:51,386 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:51,386 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:51,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:51,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-01-18 15:32:51,586 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:51,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1418796152, now seen corresponding path program 148 times [2022-01-18 15:32:51,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:51,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925122329] [2022-01-18 15:32:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:51,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:51,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:51,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925122329] [2022-01-18 15:32:51,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925122329] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:51,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648848848] [2022-01-18 15:32:51,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:51,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:51,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:51,676 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:51,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-01-18 15:32:51,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:51,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:51,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:51,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:51,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:51,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:51,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:51,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:51,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:51,991 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:51,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:32:51,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:32:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:52,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648848848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:52,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:52,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:52,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945730866] [2022-01-18 15:32:52,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:52,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:52,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:52,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:52,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:52,006 INFO L87 Difference]: Start difference. First operand 129 states and 312 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:52,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:52,135 INFO L93 Difference]: Finished difference Result 172 states and 397 transitions. [2022-01-18 15:32:52,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:32:52,136 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:52,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:52,136 INFO L225 Difference]: With dead ends: 172 [2022-01-18 15:32:52,136 INFO L226 Difference]: Without dead ends: 170 [2022-01-18 15:32:52,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:32:52,136 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:52,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 190 Invalid, 0 Unknown, 25 Unchecked, 0.1s Time] [2022-01-18 15:32:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-18 15:32:52,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 129. [2022-01-18 15:32:52,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.4296875) internal successors, (311), 128 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:52,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 311 transitions. [2022-01-18 15:32:52,138 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 311 transitions. Word has length 17 [2022-01-18 15:32:52,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:52,138 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 311 transitions. [2022-01-18 15:32:52,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:52,138 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 311 transitions. [2022-01-18 15:32:52,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:52,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:52,138 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:52,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:52,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-01-18 15:32:52,354 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:52,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:52,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1208294560, now seen corresponding path program 149 times [2022-01-18 15:32:52,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:52,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302405263] [2022-01-18 15:32:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:52,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:52,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:52,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302405263] [2022-01-18 15:32:52,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302405263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480103788] [2022-01-18 15:32:52,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:52,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:52,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:52,444 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:52,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-01-18 15:32:52,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:52,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:52,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:52,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:52,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:52,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:52,790 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:52,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:32:52,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:52,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480103788] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:52,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:52,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:52,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619459964] [2022-01-18 15:32:52,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:52,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:52,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:52,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:52,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:52,808 INFO L87 Difference]: Start difference. First operand 129 states and 311 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:53,114 INFO L93 Difference]: Finished difference Result 178 states and 406 transitions. [2022-01-18 15:32:53,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:32:53,114 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:53,115 INFO L225 Difference]: With dead ends: 178 [2022-01-18 15:32:53,115 INFO L226 Difference]: Without dead ends: 178 [2022-01-18 15:32:53,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:32:53,115 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:53,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 125 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 320 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-01-18 15:32:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-01-18 15:32:53,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 125. [2022-01-18 15:32:53,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.435483870967742) internal successors, (302), 124 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2022-01-18 15:32:53,117 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 17 [2022-01-18 15:32:53,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:53,117 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2022-01-18 15:32:53,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,117 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2022-01-18 15:32:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:53,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:53,117 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:53,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:53,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-01-18 15:32:53,318 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:53,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:53,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1492390100, now seen corresponding path program 150 times [2022-01-18 15:32:53,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:53,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541232701] [2022-01-18 15:32:53,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:53,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:53,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:53,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:53,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541232701] [2022-01-18 15:32:53,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541232701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:53,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720523916] [2022-01-18 15:32:53,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:53,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:53,414 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:53,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-01-18 15:32:53,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:32:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:53,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:53,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:32:53,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:32:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:53,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:53,707 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:53,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:32:53,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:32:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:53,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720523916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:53,732 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:53,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:32:53,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859544158] [2022-01-18 15:32:53,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:53,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:32:53,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:53,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:32:53,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:32:53,733 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:53,887 INFO L93 Difference]: Finished difference Result 145 states and 341 transitions. [2022-01-18 15:32:53,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:53,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:53,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:53,887 INFO L225 Difference]: With dead ends: 145 [2022-01-18 15:32:53,887 INFO L226 Difference]: Without dead ends: 145 [2022-01-18 15:32:53,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:53,888 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:53,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 100 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 357 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 15:32:53,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-18 15:32:53,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 126. [2022-01-18 15:32:53,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.44) internal successors, (305), 125 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 305 transitions. [2022-01-18 15:32:53,889 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 305 transitions. Word has length 17 [2022-01-18 15:32:53,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:53,889 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 305 transitions. [2022-01-18 15:32:53,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:53,889 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 305 transitions. [2022-01-18 15:32:53,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:53,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:53,890 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:53,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-01-18 15:32:54,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:54,090 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:54,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1631373494, now seen corresponding path program 151 times [2022-01-18 15:32:54,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:54,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359508677] [2022-01-18 15:32:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:54,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:54,192 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:54,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359508677] [2022-01-18 15:32:54,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359508677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:54,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172048881] [2022-01-18 15:32:54,192 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:54,192 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:54,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:54,194 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:54,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-01-18 15:32:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:54,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:54,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:54,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:32:54,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:32:54,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:54,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:54,487 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:54,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:32:54,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:54,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172048881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:54,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:54,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:32:54,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539326754] [2022-01-18 15:32:54,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:54,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:32:54,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:54,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:32:54,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:32:54,519 INFO L87 Difference]: Start difference. First operand 126 states and 305 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:54,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:54,641 INFO L93 Difference]: Finished difference Result 142 states and 329 transitions. [2022-01-18 15:32:54,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:32:54,641 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:54,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:54,641 INFO L225 Difference]: With dead ends: 142 [2022-01-18 15:32:54,641 INFO L226 Difference]: Without dead ends: 133 [2022-01-18 15:32:54,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:54,642 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:54,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 78 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-01-18 15:32:54,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-18 15:32:54,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 126. [2022-01-18 15:32:54,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.432) internal successors, (304), 125 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 304 transitions. [2022-01-18 15:32:54,643 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 304 transitions. Word has length 17 [2022-01-18 15:32:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:54,643 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 304 transitions. [2022-01-18 15:32:54,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 304 transitions. [2022-01-18 15:32:54,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:54,644 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:54,644 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:54,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-01-18 15:32:54,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:54,844 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:54,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:54,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2122362244, now seen corresponding path program 152 times [2022-01-18 15:32:54,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:54,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229788690] [2022-01-18 15:32:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:54,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:54,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:54,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229788690] [2022-01-18 15:32:54,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229788690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:54,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046275025] [2022-01-18 15:32:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:54,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:54,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:54,947 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:54,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-01-18 15:32:54,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:54,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:54,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:54,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:55,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:32:55,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:32:55,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:55,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:55,249 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:55,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:32:55,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:32:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:55,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046275025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:55,276 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:55,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:55,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501877753] [2022-01-18 15:32:55,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:55,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:55,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:55,276 INFO L87 Difference]: Start difference. First operand 126 states and 304 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:55,400 INFO L93 Difference]: Finished difference Result 142 states and 335 transitions. [2022-01-18 15:32:55,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:32:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:55,401 INFO L225 Difference]: With dead ends: 142 [2022-01-18 15:32:55,401 INFO L226 Difference]: Without dead ends: 142 [2022-01-18 15:32:55,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:55,401 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 83 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 292 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-18 15:32:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-01-18 15:32:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 127. [2022-01-18 15:32:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.4365079365079363) internal successors, (307), 126 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:55,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 307 transitions. [2022-01-18 15:32:55,403 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 307 transitions. Word has length 17 [2022-01-18 15:32:55,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:55,403 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 307 transitions. [2022-01-18 15:32:55,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:55,403 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 307 transitions. [2022-01-18 15:32:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:55,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:55,403 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:55,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:55,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:55,603 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:55,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:55,604 INFO L85 PathProgramCache]: Analyzing trace with hash 610803634, now seen corresponding path program 153 times [2022-01-18 15:32:55,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:55,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277001094] [2022-01-18 15:32:55,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:55,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:55,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:55,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277001094] [2022-01-18 15:32:55,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277001094] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:55,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016118550] [2022-01-18 15:32:55,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:32:55,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:55,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:55,709 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:55,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-01-18 15:32:55,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:32:55,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:55,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:55,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:55,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:32:55,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:32:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:55,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:56,028 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:56,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:32:56,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:56,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016118550] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:56,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:56,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:56,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884440943] [2022-01-18 15:32:56,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:56,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:56,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:56,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:56,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:56,059 INFO L87 Difference]: Start difference. First operand 127 states and 307 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:56,182 INFO L93 Difference]: Finished difference Result 140 states and 326 transitions. [2022-01-18 15:32:56,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:32:56,182 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:56,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:56,182 INFO L225 Difference]: With dead ends: 140 [2022-01-18 15:32:56,182 INFO L226 Difference]: Without dead ends: 134 [2022-01-18 15:32:56,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:32:56,183 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:56,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 92 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-01-18 15:32:56,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-18 15:32:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2022-01-18 15:32:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 2.4285714285714284) internal successors, (306), 126 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 306 transitions. [2022-01-18 15:32:56,184 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 306 transitions. Word has length 17 [2022-01-18 15:32:56,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:56,184 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 306 transitions. [2022-01-18 15:32:56,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,184 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 306 transitions. [2022-01-18 15:32:56,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:56,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:56,185 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:56,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-01-18 15:32:56,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:56,400 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:56,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:56,400 INFO L85 PathProgramCache]: Analyzing trace with hash 74073388, now seen corresponding path program 154 times [2022-01-18 15:32:56,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:56,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545433787] [2022-01-18 15:32:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:56,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:56,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:56,488 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545433787] [2022-01-18 15:32:56,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545433787] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:56,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658708830] [2022-01-18 15:32:56,488 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:32:56,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:56,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:56,489 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-01-18 15:32:56,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:32:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:56,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:56,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:56,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:56,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:56,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:56,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:56,762 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:56,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:32:56,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:32:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:56,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658708830] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:56,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:56,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:56,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471573952] [2022-01-18 15:32:56,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:56,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:56,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:56,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:56,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:56,796 INFO L87 Difference]: Start difference. First operand 127 states and 306 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:56,988 INFO L93 Difference]: Finished difference Result 167 states and 377 transitions. [2022-01-18 15:32:56,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:32:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:56,989 INFO L225 Difference]: With dead ends: 167 [2022-01-18 15:32:56,989 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 15:32:56,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:56,989 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:56,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 142 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 288 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-01-18 15:32:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 15:32:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 128. [2022-01-18 15:32:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.440944881889764) internal successors, (310), 127 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 310 transitions. [2022-01-18 15:32:56,991 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 310 transitions. Word has length 17 [2022-01-18 15:32:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:56,991 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 310 transitions. [2022-01-18 15:32:56,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 310 transitions. [2022-01-18 15:32:56,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:56,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:56,991 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:57,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-01-18 15:32:57,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2022-01-18 15:32:57,203 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:57,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 993524022, now seen corresponding path program 155 times [2022-01-18 15:32:57,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:57,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058429813] [2022-01-18 15:32:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:57,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:57,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:57,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:57,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:57,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058429813] [2022-01-18 15:32:57,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058429813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:57,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471659665] [2022-01-18 15:32:57,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:32:57,311 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:57,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:57,312 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:57,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-01-18 15:32:57,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:32:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:57,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:57,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:57,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:32:57,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:57,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:32:57,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:57,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:57,631 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:57,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:32:57,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:57,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471659665] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:57,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:57,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:57,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915349406] [2022-01-18 15:32:57,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:57,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:57,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:57,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:57,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:57,661 INFO L87 Difference]: Start difference. First operand 128 states and 310 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:57,912 INFO L93 Difference]: Finished difference Result 155 states and 351 transitions. [2022-01-18 15:32:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:32:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:57,912 INFO L225 Difference]: With dead ends: 155 [2022-01-18 15:32:57,912 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 15:32:57,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:32:57,913 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:57,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 361 Invalid, 0 Unknown, 22 Unchecked, 0.1s Time] [2022-01-18 15:32:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 15:32:57,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2022-01-18 15:32:57,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.427480916030534) internal successors, (318), 131 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:57,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 318 transitions. [2022-01-18 15:32:57,914 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 318 transitions. Word has length 17 [2022-01-18 15:32:57,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:57,914 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 318 transitions. [2022-01-18 15:32:57,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:57,915 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 318 transitions. [2022-01-18 15:32:57,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:57,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:57,915 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:57,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:58,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:58,115 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash -512842214, now seen corresponding path program 156 times [2022-01-18 15:32:58,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544300388] [2022-01-18 15:32:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:58,204 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544300388] [2022-01-18 15:32:58,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544300388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:58,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068806515] [2022-01-18 15:32:58,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:32:58,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:58,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:58,205 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:58,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-01-18 15:32:58,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:32:58,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:58,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:58,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:58,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:58,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:32:58,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:58,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:32:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:58,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:58,477 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:58,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:32:58,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:32:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:58,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068806515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:58,504 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:58,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:58,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355608395] [2022-01-18 15:32:58,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:58,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:58,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:58,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:58,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:58,504 INFO L87 Difference]: Start difference. First operand 132 states and 318 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:58,672 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2022-01-18 15:32:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:32:58,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:58,673 INFO L225 Difference]: With dead ends: 166 [2022-01-18 15:32:58,673 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 15:32:58,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:32:58,673 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:58,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 266 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-01-18 15:32:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 15:32:58,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 132. [2022-01-18 15:32:58,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.4198473282442747) internal successors, (317), 131 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:58,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 317 transitions. [2022-01-18 15:32:58,675 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 317 transitions. Word has length 17 [2022-01-18 15:32:58,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:58,675 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 317 transitions. [2022-01-18 15:32:58,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:58,675 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 317 transitions. [2022-01-18 15:32:58,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:58,676 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:58,676 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:58,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-01-18 15:32:58,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:58,891 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:58,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:58,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2114248498, now seen corresponding path program 157 times [2022-01-18 15:32:58,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:58,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431115984] [2022-01-18 15:32:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:58,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:58,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:58,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431115984] [2022-01-18 15:32:58,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431115984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:58,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236161137] [2022-01-18 15:32:58,985 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:32:58,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:58,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:58,986 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:58,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-01-18 15:32:59,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:59,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:59,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:59,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:32:59,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:32:59,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:32:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:59,281 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:32:59,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:32:59,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:32:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236161137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:59,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:59,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:32:59,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547854376] [2022-01-18 15:32:59,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:59,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:32:59,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:59,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:32:59,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:32:59,313 INFO L87 Difference]: Start difference. First operand 132 states and 317 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:59,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:32:59,401 INFO L93 Difference]: Finished difference Result 138 states and 326 transitions. [2022-01-18 15:32:59,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:32:59,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:32:59,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:32:59,402 INFO L225 Difference]: With dead ends: 138 [2022-01-18 15:32:59,402 INFO L226 Difference]: Without dead ends: 138 [2022-01-18 15:32:59,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:32:59,402 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:32:59,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 77 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-01-18 15:32:59,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-18 15:32:59,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 125. [2022-01-18 15:32:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.435483870967742) internal successors, (302), 124 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:59,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 302 transitions. [2022-01-18 15:32:59,404 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 302 transitions. Word has length 17 [2022-01-18 15:32:59,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:32:59,404 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 302 transitions. [2022-01-18 15:32:59,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:32:59,404 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 302 transitions. [2022-01-18 15:32:59,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:32:59,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:32:59,404 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:32:59,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-01-18 15:32:59,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-01-18 15:32:59,605 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:32:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:32:59,605 INFO L85 PathProgramCache]: Analyzing trace with hash 843907632, now seen corresponding path program 158 times [2022-01-18 15:32:59,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:32:59,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163079481] [2022-01-18 15:32:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:32:59,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:32:59,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:32:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:32:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163079481] [2022-01-18 15:32:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163079481] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:32:59,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632226910] [2022-01-18 15:32:59,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:32:59,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:32:59,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:32:59,704 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:32:59,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-01-18 15:32:59,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:32:59,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:32:59,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:32:59,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:32:59,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:32:59,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:32:59,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:32:59,952 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:32:59,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:32:59,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:32:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:32:59,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632226910] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:32:59,985 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:32:59,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:32:59,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130590484] [2022-01-18 15:32:59,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:32:59,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:32:59,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:32:59,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:32:59,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:32:59,986 INFO L87 Difference]: Start difference. First operand 125 states and 302 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:00,138 INFO L93 Difference]: Finished difference Result 206 states and 467 transitions. [2022-01-18 15:33:00,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:00,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:00,138 INFO L225 Difference]: With dead ends: 206 [2022-01-18 15:33:00,138 INFO L226 Difference]: Without dead ends: 206 [2022-01-18 15:33:00,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:33:00,139 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:00,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 175 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 317 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-01-18 15:33:00,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-18 15:33:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 133. [2022-01-18 15:33:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.492424242424242) internal successors, (329), 132 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:00,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 329 transitions. [2022-01-18 15:33:00,140 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 329 transitions. Word has length 17 [2022-01-18 15:33:00,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:00,140 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 329 transitions. [2022-01-18 15:33:00,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:00,140 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 329 transitions. [2022-01-18 15:33:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:00,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:00,141 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:00,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:00,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-01-18 15:33:00,355 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:00,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:00,356 INFO L85 PathProgramCache]: Analyzing trace with hash -717893786, now seen corresponding path program 159 times [2022-01-18 15:33:00,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:00,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190655158] [2022-01-18 15:33:00,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:00,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:00,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:00,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190655158] [2022-01-18 15:33:00,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190655158] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:00,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861301052] [2022-01-18 15:33:00,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:00,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:00,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:00,456 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:00,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-01-18 15:33:00,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:33:00,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:00,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:00,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:00,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:00,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:00,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:00,708 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:00,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:00,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:00,747 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:00,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861301052] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:00,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:00,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:00,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949809440] [2022-01-18 15:33:00,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:00,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:00,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:00,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:00,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:00,748 INFO L87 Difference]: Start difference. First operand 133 states and 329 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:01,032 INFO L93 Difference]: Finished difference Result 166 states and 378 transitions. [2022-01-18 15:33:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:01,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:01,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:01,033 INFO L225 Difference]: With dead ends: 166 [2022-01-18 15:33:01,033 INFO L226 Difference]: Without dead ends: 160 [2022-01-18 15:33:01,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:01,033 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:01,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 116 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 346 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-01-18 15:33:01,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-18 15:33:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 137. [2022-01-18 15:33:01,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.463235294117647) internal successors, (335), 136 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 335 transitions. [2022-01-18 15:33:01,035 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 335 transitions. Word has length 17 [2022-01-18 15:33:01,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:01,035 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 335 transitions. [2022-01-18 15:33:01,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 335 transitions. [2022-01-18 15:33:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:01,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:01,036 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:01,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-01-18 15:33:01,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-01-18 15:33:01,236 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:01,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:01,236 INFO L85 PathProgramCache]: Analyzing trace with hash -564432568, now seen corresponding path program 160 times [2022-01-18 15:33:01,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:01,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356591554] [2022-01-18 15:33:01,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:01,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:01,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356591554] [2022-01-18 15:33:01,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356591554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:01,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028597360] [2022-01-18 15:33:01,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:01,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:01,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:01,339 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:01,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-01-18 15:33:01,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:01,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:01,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:01,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:01,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:01,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:01,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:01,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:01,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:01,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:01,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028597360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:01,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:01,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897974262] [2022-01-18 15:33:01,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:01,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:01,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:01,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:01,647 INFO L87 Difference]: Start difference. First operand 137 states and 335 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:01,888 INFO L93 Difference]: Finished difference Result 182 states and 393 transitions. [2022-01-18 15:33:01,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:01,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:01,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:01,889 INFO L225 Difference]: With dead ends: 182 [2022-01-18 15:33:01,889 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:33:01,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:33:01,889 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:01,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 110 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 355 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-18 15:33:01,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:33:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2022-01-18 15:33:01,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.4592592592592593) internal successors, (332), 135 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 332 transitions. [2022-01-18 15:33:01,891 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 332 transitions. Word has length 17 [2022-01-18 15:33:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:01,891 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 332 transitions. [2022-01-18 15:33:01,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 332 transitions. [2022-01-18 15:33:01,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:01,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:01,891 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:01,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:02,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:02,092 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:02,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1254624032, now seen corresponding path program 161 times [2022-01-18 15:33:02,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:02,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312138936] [2022-01-18 15:33:02,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:02,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:02,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312138936] [2022-01-18 15:33:02,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312138936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046292695] [2022-01-18 15:33:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:02,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:02,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:02,189 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:02,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-01-18 15:33:02,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:02,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:02,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:02,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:02,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:02,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:02,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:02,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:02,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:02,441 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:02,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:02,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:02,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:02,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046292695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:02,475 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:02,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:02,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500025122] [2022-01-18 15:33:02,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:02,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:02,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:02,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:02,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:02,476 INFO L87 Difference]: Start difference. First operand 136 states and 332 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:02,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:02,816 INFO L93 Difference]: Finished difference Result 229 states and 476 transitions. [2022-01-18 15:33:02,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:02,816 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:02,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:02,817 INFO L225 Difference]: With dead ends: 229 [2022-01-18 15:33:02,817 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 15:33:02,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:33:02,817 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 100 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:02,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 127 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 303 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:33:02,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 15:33:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 126. [2022-01-18 15:33:02,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 2.424) internal successors, (303), 125 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 303 transitions. [2022-01-18 15:33:02,819 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 303 transitions. Word has length 17 [2022-01-18 15:33:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:02,819 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 303 transitions. [2022-01-18 15:33:02,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:02,819 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 303 transitions. [2022-01-18 15:33:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:02,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:02,820 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:02,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-01-18 15:33:03,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2022-01-18 15:33:03,020 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:03,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:03,020 INFO L85 PathProgramCache]: Analyzing trace with hash -335173398, now seen corresponding path program 162 times [2022-01-18 15:33:03,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:03,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385739095] [2022-01-18 15:33:03,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:03,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:03,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385739095] [2022-01-18 15:33:03,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385739095] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:03,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453903446] [2022-01-18 15:33:03,111 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:03,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:03,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:03,112 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:03,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-01-18 15:33:03,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:03,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:03,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:03,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:03,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:03,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:03,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:03,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:03,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:03,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:03,340 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:03,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:03,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:03,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453903446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:03,377 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:03,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:03,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866710047] [2022-01-18 15:33:03,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:03,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:03,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:03,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:03,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:03,378 INFO L87 Difference]: Start difference. First operand 126 states and 303 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:03,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:03,862 INFO L93 Difference]: Finished difference Result 244 states and 490 transitions. [2022-01-18 15:33:03,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:33:03,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:03,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:03,862 INFO L225 Difference]: With dead ends: 244 [2022-01-18 15:33:03,863 INFO L226 Difference]: Without dead ends: 238 [2022-01-18 15:33:03,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:33:03,863 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:03,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 147 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 448 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-01-18 15:33:03,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-01-18 15:33:03,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 131. [2022-01-18 15:33:03,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4153846153846152) internal successors, (314), 130 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:03,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 314 transitions. [2022-01-18 15:33:03,865 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 314 transitions. Word has length 17 [2022-01-18 15:33:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:03,865 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 314 transitions. [2022-01-18 15:33:03,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 314 transitions. [2022-01-18 15:33:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:03,865 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:03,865 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:03,881 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-01-18 15:33:04,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-01-18 15:33:04,065 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:04,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1841539634, now seen corresponding path program 163 times [2022-01-18 15:33:04,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:04,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545778848] [2022-01-18 15:33:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:04,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:04,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:04,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:04,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545778848] [2022-01-18 15:33:04,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545778848] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:04,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498664438] [2022-01-18 15:33:04,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:04,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:04,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:04,155 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:04,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-01-18 15:33:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:04,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:04,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:04,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:04,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:04,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:04,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:04,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:04,378 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:04,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:04,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:04,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498664438] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:04,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:04,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:04,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454682786] [2022-01-18 15:33:04,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:04,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:04,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:04,420 INFO L87 Difference]: Start difference. First operand 131 states and 314 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:04,826 INFO L93 Difference]: Finished difference Result 177 states and 400 transitions. [2022-01-18 15:33:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:33:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:04,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:04,827 INFO L225 Difference]: With dead ends: 177 [2022-01-18 15:33:04,827 INFO L226 Difference]: Without dead ends: 173 [2022-01-18 15:33:04,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:33:04,827 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:04,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 88 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 400 Invalid, 0 Unknown, 43 Unchecked, 0.1s Time] [2022-01-18 15:33:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-18 15:33:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 131. [2022-01-18 15:33:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.4) internal successors, (312), 130 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 312 transitions. [2022-01-18 15:33:04,829 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 312 transitions. Word has length 17 [2022-01-18 15:33:04,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:04,829 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 312 transitions. [2022-01-18 15:33:04,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:04,835 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 312 transitions. [2022-01-18 15:33:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:04,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:04,835 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:04,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:05,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-01-18 15:33:05,041 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:05,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:05,041 INFO L85 PathProgramCache]: Analyzing trace with hash 785551078, now seen corresponding path program 164 times [2022-01-18 15:33:05,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:05,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296245047] [2022-01-18 15:33:05,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:05,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:05,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:05,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:05,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296245047] [2022-01-18 15:33:05,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296245047] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:05,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669675666] [2022-01-18 15:33:05,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:05,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:05,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:05,134 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:05,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-01-18 15:33:05,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:05,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:05,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:05,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:05,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:05,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:05,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:05,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:05,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:05,353 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:05,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:05,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:05,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669675666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:05,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:05,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:05,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071879514] [2022-01-18 15:33:05,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:05,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:05,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:05,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:05,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:05,392 INFO L87 Difference]: Start difference. First operand 131 states and 312 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:05,654 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2022-01-18 15:33:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:05,654 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:05,655 INFO L225 Difference]: With dead ends: 155 [2022-01-18 15:33:05,655 INFO L226 Difference]: Without dead ends: 155 [2022-01-18 15:33:05,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:05,655 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:05,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 65 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 277 Invalid, 0 Unknown, 2 Unchecked, 0.1s Time] [2022-01-18 15:33:05,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-18 15:33:05,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 123. [2022-01-18 15:33:05,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 2.401639344262295) internal successors, (293), 122 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:05,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 293 transitions. [2022-01-18 15:33:05,657 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 293 transitions. Word has length 17 [2022-01-18 15:33:05,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:05,657 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 293 transitions. [2022-01-18 15:33:05,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:05,657 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 293 transitions. [2022-01-18 15:33:05,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:05,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:05,657 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:05,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-01-18 15:33:05,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:05,864 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:05,865 INFO L85 PathProgramCache]: Analyzing trace with hash 2027650732, now seen corresponding path program 165 times [2022-01-18 15:33:05,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:05,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79151375] [2022-01-18 15:33:05,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:05,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:05,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79151375] [2022-01-18 15:33:05,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79151375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:05,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949121923] [2022-01-18 15:33:05,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:05,956 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:05,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:05,957 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:05,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-01-18 15:33:05,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:05,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:06,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:06,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:06,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:06,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:06,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:06,178 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:06,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:06,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:06,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:06,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949121923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:06,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:06,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:06,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810890554] [2022-01-18 15:33:06,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:06,215 INFO L87 Difference]: Start difference. First operand 123 states and 293 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:06,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:06,474 INFO L93 Difference]: Finished difference Result 202 states and 435 transitions. [2022-01-18 15:33:06,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:06,474 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:06,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:06,475 INFO L225 Difference]: With dead ends: 202 [2022-01-18 15:33:06,475 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 15:33:06,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:33:06,475 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:06,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 115 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:06,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 15:33:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 125. [2022-01-18 15:33:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 124 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:06,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 300 transitions. [2022-01-18 15:33:06,477 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 300 transitions. Word has length 17 [2022-01-18 15:33:06,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:06,477 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 300 transitions. [2022-01-18 15:33:06,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 300 transitions. [2022-01-18 15:33:06,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:06,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:06,477 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:06,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:06,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:06,678 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:06,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:06,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1347865930, now seen corresponding path program 166 times [2022-01-18 15:33:06,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:06,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107407674] [2022-01-18 15:33:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:06,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:06,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:06,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:06,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107407674] [2022-01-18 15:33:06,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107407674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:06,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561039538] [2022-01-18 15:33:06,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:06,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:06,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:06,773 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:06,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-01-18 15:33:06,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:06,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:06,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:06,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:06,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:06,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:06,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:06,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:06,938 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:06,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:07,012 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:07,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:07,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:07,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:07,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561039538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:07,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:07,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:07,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855285124] [2022-01-18 15:33:07,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:07,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:07,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:07,045 INFO L87 Difference]: Start difference. First operand 125 states and 300 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:07,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:07,317 INFO L93 Difference]: Finished difference Result 195 states and 419 transitions. [2022-01-18 15:33:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:33:07,318 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:07,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:07,318 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:33:07,318 INFO L226 Difference]: Without dead ends: 189 [2022-01-18 15:33:07,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:07,318 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:07,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 107 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 395 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:33:07,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-18 15:33:07,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 129. [2022-01-18 15:33:07,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.40625) internal successors, (308), 128 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:07,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 308 transitions. [2022-01-18 15:33:07,320 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 308 transitions. Word has length 17 [2022-01-18 15:33:07,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:07,320 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 308 transitions. [2022-01-18 15:33:07,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:07,320 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 308 transitions. [2022-01-18 15:33:07,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:07,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:07,320 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:07,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:07,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:07,521 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:07,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:07,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1440735130, now seen corresponding path program 167 times [2022-01-18 15:33:07,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:07,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118146849] [2022-01-18 15:33:07,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:07,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:07,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118146849] [2022-01-18 15:33:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118146849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:07,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536149945] [2022-01-18 15:33:07,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:07,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:07,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:07,612 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:07,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-01-18 15:33:07,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:07,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:07,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:07,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:07,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:07,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:07,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:07,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:07,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:07,841 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:07,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:07,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:07,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536149945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:07,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:07,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:07,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456402196] [2022-01-18 15:33:07,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:07,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:07,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:07,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:07,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:07,878 INFO L87 Difference]: Start difference. First operand 129 states and 308 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:08,170 INFO L93 Difference]: Finished difference Result 194 states and 416 transitions. [2022-01-18 15:33:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:33:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:08,170 INFO L225 Difference]: With dead ends: 194 [2022-01-18 15:33:08,170 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 15:33:08,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:08,170 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:08,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 134 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 15:33:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 129. [2022-01-18 15:33:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.3984375) internal successors, (307), 128 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 307 transitions. [2022-01-18 15:33:08,172 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 307 transitions. Word has length 17 [2022-01-18 15:33:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:08,172 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 307 transitions. [2022-01-18 15:33:08,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 307 transitions. [2022-01-18 15:33:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:08,173 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:08,173 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:08,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-01-18 15:33:08,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:08,373 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash -227141454, now seen corresponding path program 168 times [2022-01-18 15:33:08,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:08,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682919610] [2022-01-18 15:33:08,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:08,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:08,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:08,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682919610] [2022-01-18 15:33:08,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682919610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:08,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299740349] [2022-01-18 15:33:08,466 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:08,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:08,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:08,466 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:08,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-01-18 15:33:08,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:08,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:08,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:08,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:08,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:08,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:08,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:08,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:08,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:08,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:08,692 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:08,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:08,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:08,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299740349] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:08,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:08,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:08,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156090297] [2022-01-18 15:33:08,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:08,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:08,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:08,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:08,725 INFO L87 Difference]: Start difference. First operand 129 states and 307 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:08,942 INFO L93 Difference]: Finished difference Result 195 states and 429 transitions. [2022-01-18 15:33:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:08,942 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:08,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:08,943 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:33:08,943 INFO L226 Difference]: Without dead ends: 195 [2022-01-18 15:33:08,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:33:08,943 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:08,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 179 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 351 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-18 15:33:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-18 15:33:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2022-01-18 15:33:08,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.4186046511627906) internal successors, (312), 129 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 312 transitions. [2022-01-18 15:33:08,945 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 312 transitions. Word has length 17 [2022-01-18 15:33:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:08,945 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 312 transitions. [2022-01-18 15:33:08,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 312 transitions. [2022-01-18 15:33:08,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:08,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:08,945 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:08,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-01-18 15:33:09,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-01-18 15:33:09,145 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:09,146 INFO L85 PathProgramCache]: Analyzing trace with hash 905505328, now seen corresponding path program 169 times [2022-01-18 15:33:09,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:09,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584919812] [2022-01-18 15:33:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:09,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:09,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584919812] [2022-01-18 15:33:09,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584919812] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900003111] [2022-01-18 15:33:09,252 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:09,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:09,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:09,253 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:09,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-01-18 15:33:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:09,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:09,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:09,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:09,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:09,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:09,500 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:09,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:09,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:09,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900003111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:09,537 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:09,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:09,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426884948] [2022-01-18 15:33:09,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:09,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:09,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:09,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:09,537 INFO L87 Difference]: Start difference. First operand 130 states and 312 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:09,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:09,707 INFO L93 Difference]: Finished difference Result 145 states and 332 transitions. [2022-01-18 15:33:09,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:09,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:09,707 INFO L225 Difference]: With dead ends: 145 [2022-01-18 15:33:09,707 INFO L226 Difference]: Without dead ends: 137 [2022-01-18 15:33:09,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:09,708 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:09,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 64 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-18 15:33:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 130. [2022-01-18 15:33:09,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.4031007751937983) internal successors, (310), 129 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 310 transitions. [2022-01-18 15:33:09,709 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 310 transitions. Word has length 17 [2022-01-18 15:33:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:09,709 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 310 transitions. [2022-01-18 15:33:09,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:09,710 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 310 transitions. [2022-01-18 15:33:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:09,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:09,710 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:09,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:09,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:09,910 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:09,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:09,910 INFO L85 PathProgramCache]: Analyzing trace with hash 848569702, now seen corresponding path program 170 times [2022-01-18 15:33:09,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:09,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48341941] [2022-01-18 15:33:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:09,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:10,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48341941] [2022-01-18 15:33:10,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48341941] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:10,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040542601] [2022-01-18 15:33:10,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:10,016 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:10,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:10,017 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:10,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-01-18 15:33:10,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:10,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:10,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:10,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:10,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:10,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:10,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:10,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:10,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:10,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:10,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:10,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040542601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:10,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:10,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:33:10,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565500668] [2022-01-18 15:33:10,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:10,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:10,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:10,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:10,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:10,293 INFO L87 Difference]: Start difference. First operand 130 states and 310 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:10,508 INFO L93 Difference]: Finished difference Result 162 states and 369 transitions. [2022-01-18 15:33:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:10,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:10,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:10,509 INFO L225 Difference]: With dead ends: 162 [2022-01-18 15:33:10,509 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 15:33:10,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:33:10,509 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:10,509 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 84 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 366 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:33:10,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 15:33:10,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 124. [2022-01-18 15:33:10,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.3983739837398375) internal successors, (295), 123 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:10,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 295 transitions. [2022-01-18 15:33:10,510 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 295 transitions. Word has length 17 [2022-01-18 15:33:10,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:10,511 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 295 transitions. [2022-01-18 15:33:10,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:10,511 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 295 transitions. [2022-01-18 15:33:10,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:10,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:10,511 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:10,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-01-18 15:33:10,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:10,719 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 822378202, now seen corresponding path program 171 times [2022-01-18 15:33:10,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232608472] [2022-01-18 15:33:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:10,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:10,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:10,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232608472] [2022-01-18 15:33:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232608472] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095889534] [2022-01-18 15:33:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:10,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:10,821 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:10,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-01-18 15:33:10,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:10,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:10,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:10,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:10,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:10,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:10,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:11,107 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:11,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:11,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:11,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:11,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095889534] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:11,141 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:11,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:11,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912900961] [2022-01-18 15:33:11,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:11,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:11,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:11,142 INFO L87 Difference]: Start difference. First operand 124 states and 295 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:11,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:11,312 INFO L93 Difference]: Finished difference Result 160 states and 367 transitions. [2022-01-18 15:33:11,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:11,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:11,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:11,313 INFO L225 Difference]: With dead ends: 160 [2022-01-18 15:33:11,313 INFO L226 Difference]: Without dead ends: 160 [2022-01-18 15:33:11,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:33:11,313 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:11,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 104 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 331 Invalid, 0 Unknown, 76 Unchecked, 0.1s Time] [2022-01-18 15:33:11,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-18 15:33:11,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2022-01-18 15:33:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.403225806451613) internal successors, (298), 124 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:11,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 298 transitions. [2022-01-18 15:33:11,315 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 298 transitions. Word has length 17 [2022-01-18 15:33:11,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:11,315 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 298 transitions. [2022-01-18 15:33:11,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:11,315 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 298 transitions. [2022-01-18 15:33:11,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:11,315 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:11,315 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:11,331 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-01-18 15:33:11,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2022-01-18 15:33:11,521 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:11,522 INFO L85 PathProgramCache]: Analyzing trace with hash -348825500, now seen corresponding path program 172 times [2022-01-18 15:33:11,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:11,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221417932] [2022-01-18 15:33:11,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:11,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:11,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221417932] [2022-01-18 15:33:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221417932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261833129] [2022-01-18 15:33:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:11,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:11,625 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:11,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-01-18 15:33:11,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:11,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:11,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:11,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:11,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:11,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:11,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:11,919 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:11,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:11,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:11,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261833129] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:11,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:11,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:11,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700320380] [2022-01-18 15:33:11,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:11,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:11,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:11,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:11,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:11,964 INFO L87 Difference]: Start difference. First operand 125 states and 298 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:12,068 INFO L93 Difference]: Finished difference Result 148 states and 333 transitions. [2022-01-18 15:33:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:12,069 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:12,069 INFO L225 Difference]: With dead ends: 148 [2022-01-18 15:33:12,069 INFO L226 Difference]: Without dead ends: 130 [2022-01-18 15:33:12,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:12,070 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 24 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:12,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 82 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 258 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:33:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-18 15:33:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-01-18 15:33:12,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.3951612903225805) internal successors, (297), 124 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 297 transitions. [2022-01-18 15:33:12,071 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 297 transitions. Word has length 17 [2022-01-18 15:33:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:12,071 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 297 transitions. [2022-01-18 15:33:12,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,071 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 297 transitions. [2022-01-18 15:33:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:12,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:12,072 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:12,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:12,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:12,290 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:12,290 INFO L85 PathProgramCache]: Analyzing trace with hash 192406058, now seen corresponding path program 173 times [2022-01-18 15:33:12,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:12,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354792903] [2022-01-18 15:33:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:12,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:12,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:12,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354792903] [2022-01-18 15:33:12,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354792903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900175529] [2022-01-18 15:33:12,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:12,390 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:12,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:12,396 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:12,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-01-18 15:33:12,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:12,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:12,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:12,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:12,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:12,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:12,689 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:12,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:12,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:12,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:12,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900175529] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:12,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:12,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:12,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248609229] [2022-01-18 15:33:12,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:12,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:12,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:12,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:12,722 INFO L87 Difference]: Start difference. First operand 125 states and 297 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:12,938 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2022-01-18 15:33:12,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:12,938 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:12,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:12,939 INFO L225 Difference]: With dead ends: 162 [2022-01-18 15:33:12,939 INFO L226 Difference]: Without dead ends: 162 [2022-01-18 15:33:12,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:12,939 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:12,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 95 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 251 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2022-01-18 15:33:12,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-01-18 15:33:12,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2022-01-18 15:33:12,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.409448818897638) internal successors, (306), 127 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 306 transitions. [2022-01-18 15:33:12,941 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 306 transitions. Word has length 17 [2022-01-18 15:33:12,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:12,941 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 306 transitions. [2022-01-18 15:33:12,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:12,941 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 306 transitions. [2022-01-18 15:33:12,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:12,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:12,941 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:12,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-01-18 15:33:13,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:13,142 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1369395360, now seen corresponding path program 174 times [2022-01-18 15:33:13,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:13,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641909173] [2022-01-18 15:33:13,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:13,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:13,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:13,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641909173] [2022-01-18 15:33:13,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641909173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:13,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355342337] [2022-01-18 15:33:13,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:13,246 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:13,247 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:13,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-01-18 15:33:13,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:33:13,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:13,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:13,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:13,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:13,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:13,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:13,563 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:13,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:13,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:13,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355342337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:13,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:13,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:13,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572796670] [2022-01-18 15:33:13,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:13,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:13,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:13,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:13,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:13,602 INFO L87 Difference]: Start difference. First operand 128 states and 306 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:13,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:13,772 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2022-01-18 15:33:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:13,772 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:13,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:13,773 INFO L225 Difference]: With dead ends: 144 [2022-01-18 15:33:13,773 INFO L226 Difference]: Without dead ends: 138 [2022-01-18 15:33:13,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:33:13,773 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:13,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 245 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-18 15:33:13,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-18 15:33:13,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 130. [2022-01-18 15:33:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.387596899224806) internal successors, (308), 129 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:13,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 308 transitions. [2022-01-18 15:33:13,774 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 308 transitions. Word has length 17 [2022-01-18 15:33:13,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:13,774 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 308 transitions. [2022-01-18 15:33:13,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:13,775 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 308 transitions. [2022-01-18 15:33:13,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:13,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:13,775 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:13,790 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-01-18 15:33:13,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:13,975 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:13,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:13,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1215934142, now seen corresponding path program 175 times [2022-01-18 15:33:13,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:13,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684856213] [2022-01-18 15:33:13,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:13,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:13,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:14,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:14,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:14,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684856213] [2022-01-18 15:33:14,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684856213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:14,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564351602] [2022-01-18 15:33:14,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:14,081 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:14,082 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:14,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-01-18 15:33:14,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:14,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:14,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:14,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:14,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:14,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:14,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:14,422 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:14,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:14,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:14,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564351602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:14,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:14,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:14,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596940657] [2022-01-18 15:33:14,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:14,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:14,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:14,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:14,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:14,459 INFO L87 Difference]: Start difference. First operand 130 states and 308 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:14,586 INFO L93 Difference]: Finished difference Result 142 states and 325 transitions. [2022-01-18 15:33:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:14,587 INFO L225 Difference]: With dead ends: 142 [2022-01-18 15:33:14,587 INFO L226 Difference]: Without dead ends: 134 [2022-01-18 15:33:14,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:14,587 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:14,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 71 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 235 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 15:33:14,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-18 15:33:14,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2022-01-18 15:33:14,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 2.4015748031496065) internal successors, (305), 127 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:14,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 305 transitions. [2022-01-18 15:33:14,589 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 305 transitions. Word has length 17 [2022-01-18 15:33:14,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:14,589 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 305 transitions. [2022-01-18 15:33:14,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:14,589 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 305 transitions. [2022-01-18 15:33:14,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:14,589 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:14,589 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:14,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-01-18 15:33:14,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:14,801 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:14,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1906125606, now seen corresponding path program 176 times [2022-01-18 15:33:14,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:14,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467425685] [2022-01-18 15:33:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:14,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:14,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:14,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467425685] [2022-01-18 15:33:14,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467425685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:14,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749895322] [2022-01-18 15:33:14,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:14,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:14,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:14,896 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:14,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-01-18 15:33:14,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:14,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:15,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:15,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:15,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:15,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:15,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:15,184 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:15,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:15,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:15,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:15,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749895322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:15,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:15,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:15,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094388739] [2022-01-18 15:33:15,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:15,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:15,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:15,216 INFO L87 Difference]: Start difference. First operand 128 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:15,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:15,526 INFO L93 Difference]: Finished difference Result 225 states and 484 transitions. [2022-01-18 15:33:15,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:15,527 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:15,527 INFO L225 Difference]: With dead ends: 225 [2022-01-18 15:33:15,527 INFO L226 Difference]: Without dead ends: 225 [2022-01-18 15:33:15,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:33:15,527 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:15,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 118 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 278 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-01-18 15:33:15,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-18 15:33:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 135. [2022-01-18 15:33:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.425373134328358) internal successors, (325), 134 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 325 transitions. [2022-01-18 15:33:15,529 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 325 transitions. Word has length 17 [2022-01-18 15:33:15,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:15,529 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 325 transitions. [2022-01-18 15:33:15,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:15,529 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 325 transitions. [2022-01-18 15:33:15,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:15,529 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:15,530 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:15,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Ended with exit code 0 [2022-01-18 15:33:15,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:15,730 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -986674972, now seen corresponding path program 177 times [2022-01-18 15:33:15,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:15,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975977348] [2022-01-18 15:33:15,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:15,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:15,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975977348] [2022-01-18 15:33:15,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975977348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:15,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895755285] [2022-01-18 15:33:15,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:15,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:15,826 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-01-18 15:33:15,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:15,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:15,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:15,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:15,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:15,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:15,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:15,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:16,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:16,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:16,131 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:16,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:16,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895755285] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:16,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:16,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626912944] [2022-01-18 15:33:16,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:16,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:16,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:16,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:16,167 INFO L87 Difference]: Start difference. First operand 135 states and 325 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:16,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:16,520 INFO L93 Difference]: Finished difference Result 183 states and 401 transitions. [2022-01-18 15:33:16,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:33:16,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:16,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:16,521 INFO L225 Difference]: With dead ends: 183 [2022-01-18 15:33:16,521 INFO L226 Difference]: Without dead ends: 177 [2022-01-18 15:33:16,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:33:16,521 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:16,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 121 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 15 Unchecked, 0.1s Time] [2022-01-18 15:33:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-18 15:33:16,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 139. [2022-01-18 15:33:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.4130434782608696) internal successors, (333), 138 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:16,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 333 transitions. [2022-01-18 15:33:16,523 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 333 transitions. Word has length 17 [2022-01-18 15:33:16,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:16,523 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 333 transitions. [2022-01-18 15:33:16,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:16,523 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 333 transitions. [2022-01-18 15:33:16,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:16,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:16,524 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:16,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-01-18 15:33:16,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:16,724 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:16,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:16,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1801926088, now seen corresponding path program 178 times [2022-01-18 15:33:16,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:16,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718235530] [2022-01-18 15:33:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:16,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:16,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718235530] [2022-01-18 15:33:16,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718235530] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:16,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410340801] [2022-01-18 15:33:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:16,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:16,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:16,826 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:16,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-01-18 15:33:16,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:16,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:16,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:16,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:16,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:16,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:16,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:16,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:17,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:17,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:17,136 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:17,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:17,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:17,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410340801] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:17,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:17,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:17,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938624883] [2022-01-18 15:33:17,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:17,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:17,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:17,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:17,171 INFO L87 Difference]: Start difference. First operand 139 states and 333 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:17,457 INFO L93 Difference]: Finished difference Result 147 states and 344 transitions. [2022-01-18 15:33:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:17,457 INFO L225 Difference]: With dead ends: 147 [2022-01-18 15:33:17,457 INFO L226 Difference]: Without dead ends: 143 [2022-01-18 15:33:17,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:17,458 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 19 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:17,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 69 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 245 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-01-18 15:33:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-18 15:33:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2022-01-18 15:33:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.4057971014492754) internal successors, (332), 138 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:17,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 332 transitions. [2022-01-18 15:33:17,459 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 332 transitions. Word has length 17 [2022-01-18 15:33:17,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:17,459 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 332 transitions. [2022-01-18 15:33:17,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:17,459 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 332 transitions. [2022-01-18 15:33:17,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:17,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:17,460 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:17,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-01-18 15:33:17,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2022-01-18 15:33:17,660 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 134049504, now seen corresponding path program 179 times [2022-01-18 15:33:17,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:17,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149587730] [2022-01-18 15:33:17,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:17,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:17,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:17,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:17,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149587730] [2022-01-18 15:33:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149587730] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:17,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976646997] [2022-01-18 15:33:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:17,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:17,764 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:17,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-01-18 15:33:17,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:17,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:17,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:17,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:17,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:17,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:17,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:17,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:17,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:17,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:18,051 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:18,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:18,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:18,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:18,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976646997] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:18,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:18,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:18,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694270431] [2022-01-18 15:33:18,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:18,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:18,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:18,088 INFO L87 Difference]: Start difference. First operand 139 states and 332 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:18,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:18,288 INFO L93 Difference]: Finished difference Result 149 states and 351 transitions. [2022-01-18 15:33:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:18,288 INFO L225 Difference]: With dead ends: 149 [2022-01-18 15:33:18,288 INFO L226 Difference]: Without dead ends: 149 [2022-01-18 15:33:18,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:33:18,288 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:18,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 290 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-01-18 15:33:18,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-18 15:33:18,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 134. [2022-01-18 15:33:18,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.4135338345864663) internal successors, (321), 133 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:18,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 321 transitions. [2022-01-18 15:33:18,290 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 321 transitions. Word has length 17 [2022-01-18 15:33:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 321 transitions. [2022-01-18 15:33:18,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 321 transitions. [2022-01-18 15:33:18,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:18,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:18,290 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:18,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-01-18 15:33:18,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:18,506 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash 623761578, now seen corresponding path program 180 times [2022-01-18 15:33:18,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:18,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030320212] [2022-01-18 15:33:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:18,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:18,603 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:18,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030320212] [2022-01-18 15:33:18,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030320212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:18,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493727562] [2022-01-18 15:33:18,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:18,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:18,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:18,605 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:18,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-01-18 15:33:18,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:33:18,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:18,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:18,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:18,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:18,853 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:18,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:18,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:18,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493727562] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:18,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:18,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:18,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077688587] [2022-01-18 15:33:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:18,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:18,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:18,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:18,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:18,889 INFO L87 Difference]: Start difference. First operand 134 states and 321 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:19,092 INFO L93 Difference]: Finished difference Result 222 states and 486 transitions. [2022-01-18 15:33:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:19,092 INFO L225 Difference]: With dead ends: 222 [2022-01-18 15:33:19,092 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 15:33:19,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:19,093 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:19,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 218 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 479 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-01-18 15:33:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 15:33:19,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 139. [2022-01-18 15:33:19,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.463768115942029) internal successors, (340), 138 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 340 transitions. [2022-01-18 15:33:19,094 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 340 transitions. Word has length 17 [2022-01-18 15:33:19,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:19,095 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 340 transitions. [2022-01-18 15:33:19,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,095 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 340 transitions. [2022-01-18 15:33:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:19,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:19,095 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:19,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-01-18 15:33:19,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-01-18 15:33:19,295 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:19,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:19,296 INFO L85 PathProgramCache]: Analyzing trace with hash -938039840, now seen corresponding path program 181 times [2022-01-18 15:33:19,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:19,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494090701] [2022-01-18 15:33:19,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:19,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:19,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:19,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494090701] [2022-01-18 15:33:19,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494090701] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:19,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141154948] [2022-01-18 15:33:19,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:19,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:19,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:19,396 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:19,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-01-18 15:33:19,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:19,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:19,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:19,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:19,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:19,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:19,650 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:19,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:19,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:19,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141154948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:19,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:19,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:19,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385048452] [2022-01-18 15:33:19,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:19,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:19,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:19,691 INFO L87 Difference]: Start difference. First operand 139 states and 340 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:19,919 INFO L93 Difference]: Finished difference Result 196 states and 424 transitions. [2022-01-18 15:33:19,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:19,919 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:19,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:19,919 INFO L225 Difference]: With dead ends: 196 [2022-01-18 15:33:19,919 INFO L226 Difference]: Without dead ends: 184 [2022-01-18 15:33:19,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:33:19,919 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:19,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 223 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 483 Invalid, 0 Unknown, 70 Unchecked, 0.2s Time] [2022-01-18 15:33:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-18 15:33:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 142. [2022-01-18 15:33:19,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.4326241134751774) internal successors, (343), 141 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2022-01-18 15:33:19,921 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 17 [2022-01-18 15:33:19,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:19,921 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2022-01-18 15:33:19,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:19,921 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2022-01-18 15:33:19,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:19,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:19,921 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:19,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-01-18 15:33:20,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-01-18 15:33:20,122 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:20,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:20,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1474770086, now seen corresponding path program 182 times [2022-01-18 15:33:20,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:20,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499247469] [2022-01-18 15:33:20,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:20,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:20,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:20,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:20,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499247469] [2022-01-18 15:33:20,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499247469] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:20,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022652004] [2022-01-18 15:33:20,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:20,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:20,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:20,216 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:20,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-01-18 15:33:20,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:20,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:20,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:20,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:20,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:20,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:20,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:20,460 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:20,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:20,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:20,496 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:20,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022652004] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:20,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:20,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:20,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258603035] [2022-01-18 15:33:20,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:20,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:20,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:20,497 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:20,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:20,692 INFO L93 Difference]: Finished difference Result 247 states and 527 transitions. [2022-01-18 15:33:20,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:20,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:20,692 INFO L225 Difference]: With dead ends: 247 [2022-01-18 15:33:20,692 INFO L226 Difference]: Without dead ends: 247 [2022-01-18 15:33:20,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:33:20,693 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:20,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 184 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 363 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-01-18 15:33:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-18 15:33:20,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 143. [2022-01-18 15:33:20,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.443661971830986) internal successors, (347), 142 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:20,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 347 transitions. [2022-01-18 15:33:20,695 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 347 transitions. Word has length 17 [2022-01-18 15:33:20,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:20,695 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 347 transitions. [2022-01-18 15:33:20,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:20,695 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 347 transitions. [2022-01-18 15:33:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:20,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:20,695 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:20,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-01-18 15:33:20,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-01-18 15:33:20,896 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash -555319452, now seen corresponding path program 183 times [2022-01-18 15:33:20,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:20,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585851974] [2022-01-18 15:33:20,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:20,896 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:20,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:20,997 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585851974] [2022-01-18 15:33:20,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585851974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:20,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060833321] [2022-01-18 15:33:20,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:20,997 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:20,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:20,998 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:20,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-01-18 15:33:21,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:21,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:21,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:21,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:21,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:21,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:21,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:21,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:21,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:21,242 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:21,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:21,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:21,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:21,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060833321] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:21,287 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:21,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:21,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573699744] [2022-01-18 15:33:21,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:21,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:21,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:21,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:21,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:21,288 INFO L87 Difference]: Start difference. First operand 143 states and 347 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:21,657 INFO L93 Difference]: Finished difference Result 233 states and 486 transitions. [2022-01-18 15:33:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:33:21,657 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:21,657 INFO L225 Difference]: With dead ends: 233 [2022-01-18 15:33:21,657 INFO L226 Difference]: Without dead ends: 227 [2022-01-18 15:33:21,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:33:21,658 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 85 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:21,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 171 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 438 Invalid, 0 Unknown, 30 Unchecked, 0.2s Time] [2022-01-18 15:33:21,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-18 15:33:21,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 144. [2022-01-18 15:33:21,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4475524475524475) internal successors, (350), 143 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:21,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 350 transitions. [2022-01-18 15:33:21,659 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 350 transitions. Word has length 17 [2022-01-18 15:33:21,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:21,659 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 350 transitions. [2022-01-18 15:33:21,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:21,660 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 350 transitions. [2022-01-18 15:33:21,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:21,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:21,660 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:21,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:21,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:21,860 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:21,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:21,860 INFO L85 PathProgramCache]: Analyzing trace with hash -2061685688, now seen corresponding path program 184 times [2022-01-18 15:33:21,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:21,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609665065] [2022-01-18 15:33:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:21,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:21,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:21,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609665065] [2022-01-18 15:33:21,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609665065] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:21,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272192645] [2022-01-18 15:33:21,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:21,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:21,949 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:21,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-01-18 15:33:21,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:21,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:21,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:21,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:22,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:22,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:22,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:22,102 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:22,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:22,174 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:22,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:22,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272192645] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:22,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264008438] [2022-01-18 15:33:22,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:22,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:22,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:22,210 INFO L87 Difference]: Start difference. First operand 144 states and 350 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:22,531 INFO L93 Difference]: Finished difference Result 250 states and 525 transitions. [2022-01-18 15:33:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:33:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:22,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:22,532 INFO L225 Difference]: With dead ends: 250 [2022-01-18 15:33:22,532 INFO L226 Difference]: Without dead ends: 246 [2022-01-18 15:33:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:22,532 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:22,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 214 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-18 15:33:22,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-18 15:33:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2022-01-18 15:33:22,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4405594405594404) internal successors, (349), 143 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:22,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 349 transitions. [2022-01-18 15:33:22,534 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 349 transitions. Word has length 17 [2022-01-18 15:33:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:22,534 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 349 transitions. [2022-01-18 15:33:22,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 349 transitions. [2022-01-18 15:33:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:22,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:22,534 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:22,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-01-18 15:33:22,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-01-18 15:33:22,735 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:22,735 INFO L85 PathProgramCache]: Analyzing trace with hash 565405024, now seen corresponding path program 185 times [2022-01-18 15:33:22,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:22,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784580148] [2022-01-18 15:33:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:22,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:22,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784580148] [2022-01-18 15:33:22,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784580148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:22,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299694617] [2022-01-18 15:33:22,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:22,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:22,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:22,822 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:22,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-01-18 15:33:22,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:33:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:22,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:22,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:22,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:22,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:22,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:22,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:23,032 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:23,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:23,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:23,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299694617] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:23,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:23,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:23,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080458343] [2022-01-18 15:33:23,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:23,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:23,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:23,073 INFO L87 Difference]: Start difference. First operand 144 states and 349 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:23,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:23,298 INFO L93 Difference]: Finished difference Result 188 states and 421 transitions. [2022-01-18 15:33:23,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:23,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:23,299 INFO L225 Difference]: With dead ends: 188 [2022-01-18 15:33:23,299 INFO L226 Difference]: Without dead ends: 188 [2022-01-18 15:33:23,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:23,299 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:23,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 155 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 436 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:33:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-18 15:33:23,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 141. [2022-01-18 15:33:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.4357142857142855) internal successors, (341), 140 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 341 transitions. [2022-01-18 15:33:23,310 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 341 transitions. Word has length 17 [2022-01-18 15:33:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:23,310 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 341 transitions. [2022-01-18 15:33:23,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:23,310 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 341 transitions. [2022-01-18 15:33:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:23,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:23,311 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:23,327 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-01-18 15:33:23,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2022-01-18 15:33:23,511 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:23,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:23,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1792043882, now seen corresponding path program 186 times [2022-01-18 15:33:23,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:23,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871684697] [2022-01-18 15:33:23,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:23,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:23,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:23,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871684697] [2022-01-18 15:33:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871684697] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607274242] [2022-01-18 15:33:23,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:23,615 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:23,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:23,616 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:23,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-01-18 15:33:23,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:23,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:23,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:23,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:23,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:23,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:23,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:23,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:23,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:23,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:23,838 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:23,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:23,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:23,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607274242] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:23,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:23,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:23,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146652960] [2022-01-18 15:33:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:23,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:23,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:23,879 INFO L87 Difference]: Start difference. First operand 141 states and 341 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:24,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:24,173 INFO L93 Difference]: Finished difference Result 206 states and 440 transitions. [2022-01-18 15:33:24,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:24,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:24,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:24,174 INFO L225 Difference]: With dead ends: 206 [2022-01-18 15:33:24,174 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 15:33:24,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:24,174 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:24,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 113 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:24,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 15:33:24,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 133. [2022-01-18 15:33:24,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.4015151515151514) internal successors, (317), 132 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:24,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 317 transitions. [2022-01-18 15:33:24,176 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 317 transitions. Word has length 17 [2022-01-18 15:33:24,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:24,176 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 317 transitions. [2022-01-18 15:33:24,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:24,176 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 317 transitions. [2022-01-18 15:33:24,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:24,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:24,176 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:24,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:24,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-01-18 15:33:24,390 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:24,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:24,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1568011984, now seen corresponding path program 187 times [2022-01-18 15:33:24,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:24,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78012635] [2022-01-18 15:33:24,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:24,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:24,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78012635] [2022-01-18 15:33:24,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78012635] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:24,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262557203] [2022-01-18 15:33:24,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:24,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:24,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:24,502 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:24,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-01-18 15:33:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:24,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:24,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:24,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:24,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:24,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:24,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:24,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:24,720 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:24,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:24,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:24,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:24,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262557203] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:24,756 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:24,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:24,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660656274] [2022-01-18 15:33:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:24,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:24,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:24,756 INFO L87 Difference]: Start difference. First operand 133 states and 317 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:25,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:25,384 INFO L93 Difference]: Finished difference Result 299 states and 594 transitions. [2022-01-18 15:33:25,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:33:25,384 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:25,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:25,385 INFO L225 Difference]: With dead ends: 299 [2022-01-18 15:33:25,385 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 15:33:25,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=1447, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:33:25,385 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:25,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 150 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:33:25,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 15:33:25,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 142. [2022-01-18 15:33:25,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.4326241134751774) internal successors, (343), 141 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 343 transitions. [2022-01-18 15:33:25,387 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 343 transitions. Word has length 17 [2022-01-18 15:33:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:25,387 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 343 transitions. [2022-01-18 15:33:25,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 343 transitions. [2022-01-18 15:33:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:25,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:25,388 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:25,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:25,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:25,588 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:25,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:25,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1220589076, now seen corresponding path program 188 times [2022-01-18 15:33:25,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:25,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548913870] [2022-01-18 15:33:25,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:25,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:25,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:25,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548913870] [2022-01-18 15:33:25,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548913870] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:25,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981436068] [2022-01-18 15:33:25,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:25,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:25,680 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:25,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-01-18 15:33:25,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:25,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:25,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:25,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:25,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:25,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:25,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:25,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:25,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:25,896 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:25,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:25,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:25,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981436068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:25,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:25,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:25,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950402877] [2022-01-18 15:33:25,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:25,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:25,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:25,937 INFO L87 Difference]: Start difference. First operand 142 states and 343 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:26,285 INFO L93 Difference]: Finished difference Result 191 states and 420 transitions. [2022-01-18 15:33:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:26,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:26,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:26,285 INFO L225 Difference]: With dead ends: 191 [2022-01-18 15:33:26,285 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 15:33:26,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:33:26,286 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 73 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:26,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 112 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:26,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 15:33:26,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 142. [2022-01-18 15:33:26,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.425531914893617) internal successors, (342), 141 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 342 transitions. [2022-01-18 15:33:26,287 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 342 transitions. Word has length 17 [2022-01-18 15:33:26,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:26,287 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 342 transitions. [2022-01-18 15:33:26,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:26,288 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 342 transitions. [2022-01-18 15:33:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:26,288 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:26,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:26,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-01-18 15:33:26,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:26,492 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:26,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:26,493 INFO L85 PathProgramCache]: Analyzing trace with hash -447287508, now seen corresponding path program 189 times [2022-01-18 15:33:26,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:26,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327509218] [2022-01-18 15:33:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:26,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:26,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:26,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327509218] [2022-01-18 15:33:26,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327509218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:26,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654474067] [2022-01-18 15:33:26,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:26,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:26,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:26,586 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:26,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-01-18 15:33:26,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:33:26,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:26,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:26,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:26,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:26,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:26,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:26,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:26,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:26,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:26,798 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:26,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:26,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:26,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654474067] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:26,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:26,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:26,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737495963] [2022-01-18 15:33:26,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:26,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:26,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:26,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:26,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:26,834 INFO L87 Difference]: Start difference. First operand 142 states and 342 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:27,149 INFO L93 Difference]: Finished difference Result 203 states and 452 transitions. [2022-01-18 15:33:27,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:33:27,149 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:27,150 INFO L225 Difference]: With dead ends: 203 [2022-01-18 15:33:27,150 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 15:33:27,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:27,150 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:27,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 124 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 316 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-01-18 15:33:27,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 15:33:27,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2022-01-18 15:33:27,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.4265734265734267) internal successors, (347), 143 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 347 transitions. [2022-01-18 15:33:27,152 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 347 transitions. Word has length 17 [2022-01-18 15:33:27,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:27,152 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 347 transitions. [2022-01-18 15:33:27,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,152 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 347 transitions. [2022-01-18 15:33:27,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:27,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:27,152 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:27,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-01-18 15:33:27,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:27,353 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:27,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash 628423648, now seen corresponding path program 190 times [2022-01-18 15:33:27,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:27,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764277535] [2022-01-18 15:33:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:27,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:27,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:27,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764277535] [2022-01-18 15:33:27,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764277535] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:27,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503634199] [2022-01-18 15:33:27,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:27,458 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:27,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:27,459 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:27,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-01-18 15:33:27,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:27,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:27,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:27,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:27,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:33:27,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:33:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:27,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:27,689 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:27,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:27,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:27,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503634199] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:27,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:27,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:27,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834315985] [2022-01-18 15:33:27,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:27,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:27,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:27,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:27,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:27,725 INFO L87 Difference]: Start difference. First operand 144 states and 347 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:27,918 INFO L93 Difference]: Finished difference Result 176 states and 398 transitions. [2022-01-18 15:33:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:27,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:27,918 INFO L225 Difference]: With dead ends: 176 [2022-01-18 15:33:27,918 INFO L226 Difference]: Without dead ends: 176 [2022-01-18 15:33:27,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:33:27,919 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:27,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 94 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 270 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-01-18 15:33:27,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-18 15:33:27,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 133. [2022-01-18 15:33:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.378787878787879) internal successors, (314), 132 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 314 transitions. [2022-01-18 15:33:27,920 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 314 transitions. Word has length 17 [2022-01-18 15:33:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:27,920 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 314 transitions. [2022-01-18 15:33:27,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 314 transitions. [2022-01-18 15:33:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:27,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:27,921 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:27,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-01-18 15:33:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-01-18 15:33:28,121 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:28,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash 478807258, now seen corresponding path program 191 times [2022-01-18 15:33:28,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:28,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439226373] [2022-01-18 15:33:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:28,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:28,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:28,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:28,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439226373] [2022-01-18 15:33:28,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439226373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:28,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037132368] [2022-01-18 15:33:28,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:28,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:28,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:28,217 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:28,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-01-18 15:33:28,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:33:28,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:28,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:28,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:28,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:28,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:28,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:28,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:28,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:28,521 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:28,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:28,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:28,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037132368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:28,557 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:28,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:28,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428582711] [2022-01-18 15:33:28,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:28,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:28,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:28,558 INFO L87 Difference]: Start difference. First operand 133 states and 314 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:28,837 INFO L93 Difference]: Finished difference Result 203 states and 438 transitions. [2022-01-18 15:33:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:28,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:28,838 INFO L225 Difference]: With dead ends: 203 [2022-01-18 15:33:28,838 INFO L226 Difference]: Without dead ends: 203 [2022-01-18 15:33:28,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:28,838 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 88 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:28,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 122 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 264 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-18 15:33:28,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-18 15:33:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 136. [2022-01-18 15:33:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.4) internal successors, (324), 135 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:28,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 324 transitions. [2022-01-18 15:33:28,840 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 324 transitions. Word has length 17 [2022-01-18 15:33:28,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:28,840 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 324 transitions. [2022-01-18 15:33:28,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:28,840 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 324 transitions. [2022-01-18 15:33:28,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:28,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:28,840 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:28,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-01-18 15:33:29,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-01-18 15:33:29,041 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1398257892, now seen corresponding path program 192 times [2022-01-18 15:33:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:29,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028851076] [2022-01-18 15:33:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:29,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:29,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028851076] [2022-01-18 15:33:29,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028851076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:29,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161572011] [2022-01-18 15:33:29,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:29,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:29,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:29,133 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:29,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-01-18 15:33:29,159 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:33:29,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:29,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:29,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:29,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:29,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:29,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:29,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:29,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:29,429 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:29,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:29,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:29,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161572011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:29,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:29,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:29,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938585863] [2022-01-18 15:33:29,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:29,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:29,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:29,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:29,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:29,460 INFO L87 Difference]: Start difference. First operand 136 states and 324 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:29,843 INFO L93 Difference]: Finished difference Result 192 states and 413 transitions. [2022-01-18 15:33:29,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:33:29,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:29,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:29,844 INFO L225 Difference]: With dead ends: 192 [2022-01-18 15:33:29,844 INFO L226 Difference]: Without dead ends: 186 [2022-01-18 15:33:29,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:33:29,844 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:29,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 130 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 360 Invalid, 0 Unknown, 16 Unchecked, 0.1s Time] [2022-01-18 15:33:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-18 15:33:29,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 145. [2022-01-18 15:33:29,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.4097222222222223) internal successors, (347), 144 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 347 transitions. [2022-01-18 15:33:29,846 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 347 transitions. Word has length 17 [2022-01-18 15:33:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:29,846 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 347 transitions. [2022-01-18 15:33:29,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 347 transitions. [2022-01-18 15:33:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:29,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:29,847 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:29,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-01-18 15:33:30,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-01-18 15:33:30,058 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:30,059 INFO L85 PathProgramCache]: Analyzing trace with hash -108108344, now seen corresponding path program 193 times [2022-01-18 15:33:30,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:30,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512816128] [2022-01-18 15:33:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:30,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:30,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:30,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512816128] [2022-01-18 15:33:30,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512816128] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:30,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991632177] [2022-01-18 15:33:30,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:30,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:30,154 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-01-18 15:33:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:30,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:30,295 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:30,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:30,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:30,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:30,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:30,446 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:30,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:30,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:30,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991632177] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:30,482 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:30,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:30,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969527322] [2022-01-18 15:33:30,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:30,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:30,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:30,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:30,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:30,483 INFO L87 Difference]: Start difference. First operand 145 states and 347 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:30,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:30,784 INFO L93 Difference]: Finished difference Result 186 states and 413 transitions. [2022-01-18 15:33:30,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:33:30,784 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:30,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:30,784 INFO L225 Difference]: With dead ends: 186 [2022-01-18 15:33:30,785 INFO L226 Difference]: Without dead ends: 182 [2022-01-18 15:33:30,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:33:30,785 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:30,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 116 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 264 Invalid, 0 Unknown, 8 Unchecked, 0.1s Time] [2022-01-18 15:33:30,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-01-18 15:33:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 145. [2022-01-18 15:33:30,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.3958333333333335) internal successors, (345), 144 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 345 transitions. [2022-01-18 15:33:30,787 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 345 transitions. Word has length 17 [2022-01-18 15:33:30,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:30,787 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 345 transitions. [2022-01-18 15:33:30,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 345 transitions. [2022-01-18 15:33:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:30,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:30,787 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:30,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:31,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-01-18 15:33:31,002 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:31,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:31,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1775984928, now seen corresponding path program 194 times [2022-01-18 15:33:31,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:31,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871077818] [2022-01-18 15:33:31,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:31,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:31,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871077818] [2022-01-18 15:33:31,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871077818] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188216940] [2022-01-18 15:33:31,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:31,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:31,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:31,097 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:31,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-01-18 15:33:31,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:31,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:31,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:31,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:31,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:31,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:31,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:31,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:31,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:31,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:31,362 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:31,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:31,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:31,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188216940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:31,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:31,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:31,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750123408] [2022-01-18 15:33:31,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:31,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:31,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:31,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:31,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:31,398 INFO L87 Difference]: Start difference. First operand 145 states and 345 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:31,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:31,514 INFO L93 Difference]: Finished difference Result 160 states and 372 transitions. [2022-01-18 15:33:31,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:31,515 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:31,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:31,515 INFO L225 Difference]: With dead ends: 160 [2022-01-18 15:33:31,515 INFO L226 Difference]: Without dead ends: 160 [2022-01-18 15:33:31,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:33:31,515 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 14 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:31,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 107 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-01-18 15:33:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-18 15:33:31,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 143. [2022-01-18 15:33:31,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.4014084507042255) internal successors, (341), 142 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:31,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 341 transitions. [2022-01-18 15:33:31,517 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 341 transitions. Word has length 17 [2022-01-18 15:33:31,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:31,517 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 341 transitions. [2022-01-18 15:33:31,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:31,517 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 341 transitions. [2022-01-18 15:33:31,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:31,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:31,517 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:31,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-01-18 15:33:31,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2022-01-18 15:33:31,718 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash -643338146, now seen corresponding path program 195 times [2022-01-18 15:33:31,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:31,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259535982] [2022-01-18 15:33:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:31,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:31,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:31,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259535982] [2022-01-18 15:33:31,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259535982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:31,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503672760] [2022-01-18 15:33:31,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:31,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:31,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:31,826 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:31,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-01-18 15:33:31,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:33:31,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:31,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:31,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:32,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:32,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:32,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:32,176 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:32,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:32,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:32,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503672760] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:32,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:32,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:32,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125194751] [2022-01-18 15:33:32,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:32,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:32,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:32,212 INFO L87 Difference]: Start difference. First operand 143 states and 341 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:32,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:32,424 INFO L93 Difference]: Finished difference Result 160 states and 362 transitions. [2022-01-18 15:33:32,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:33:32,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:32,425 INFO L225 Difference]: With dead ends: 160 [2022-01-18 15:33:32,425 INFO L226 Difference]: Without dead ends: 148 [2022-01-18 15:33:32,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:33:32,425 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:32,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 76 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 41 Unchecked, 0.1s Time] [2022-01-18 15:33:32,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-18 15:33:32,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 141. [2022-01-18 15:33:32,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3857142857142857) internal successors, (334), 140 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:32,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 334 transitions. [2022-01-18 15:33:32,427 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 334 transitions. Word has length 17 [2022-01-18 15:33:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:32,427 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 334 transitions. [2022-01-18 15:33:32,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 334 transitions. [2022-01-18 15:33:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:32,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:32,427 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:32,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-01-18 15:33:32,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:32,628 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:32,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:32,628 INFO L85 PathProgramCache]: Analyzing trace with hash -700273772, now seen corresponding path program 196 times [2022-01-18 15:33:32,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:32,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806665100] [2022-01-18 15:33:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:32,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:32,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:32,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806665100] [2022-01-18 15:33:32,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806665100] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:32,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772563937] [2022-01-18 15:33:32,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:32,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:32,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:32,731 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:32,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-01-18 15:33:32,752 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:32,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:32,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:32,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:32,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:32,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:32,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:33,017 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:33,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:33,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:33,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772563937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:33,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:33,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:33,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742603593] [2022-01-18 15:33:33,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:33,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:33,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:33,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:33,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:33,049 INFO L87 Difference]: Start difference. First operand 141 states and 334 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:33,289 INFO L93 Difference]: Finished difference Result 165 states and 382 transitions. [2022-01-18 15:33:33,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:33:33,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:33,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:33,290 INFO L225 Difference]: With dead ends: 165 [2022-01-18 15:33:33,290 INFO L226 Difference]: Without dead ends: 165 [2022-01-18 15:33:33,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:33,290 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:33,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 94 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 271 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:33:33,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-18 15:33:33,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 145. [2022-01-18 15:33:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.4027777777777777) internal successors, (346), 144 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 346 transitions. [2022-01-18 15:33:33,291 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 346 transitions. Word has length 17 [2022-01-18 15:33:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:33,292 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 346 transitions. [2022-01-18 15:33:33,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 346 transitions. [2022-01-18 15:33:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:33,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:33,292 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:33,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-01-18 15:33:33,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2022-01-18 15:33:33,492 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:33,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:33,492 INFO L85 PathProgramCache]: Analyzing trace with hash -55592824, now seen corresponding path program 197 times [2022-01-18 15:33:33,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:33,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631519717] [2022-01-18 15:33:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:33,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:33,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631519717] [2022-01-18 15:33:33,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631519717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014870758] [2022-01-18 15:33:33,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:33,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:33,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:33,618 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:33,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-01-18 15:33:33,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:33,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:33,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:33,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:33,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:33:33,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:33,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:33:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:33,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:33,949 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:33,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:33,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:33,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:33,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014870758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:33,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:33,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:33:33,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637198122] [2022-01-18 15:33:33,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:33,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:33:33,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:33,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:33:33,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:33:33,984 INFO L87 Difference]: Start difference. First operand 145 states and 346 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:34,117 INFO L93 Difference]: Finished difference Result 162 states and 369 transitions. [2022-01-18 15:33:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:34,118 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:34,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:34,118 INFO L225 Difference]: With dead ends: 162 [2022-01-18 15:33:34,118 INFO L226 Difference]: Without dead ends: 150 [2022-01-18 15:33:34,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:34,118 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:34,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 82 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:33:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-18 15:33:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-01-18 15:33:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.388888888888889) internal successors, (344), 144 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 344 transitions. [2022-01-18 15:33:34,120 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 344 transitions. Word has length 17 [2022-01-18 15:33:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:34,120 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 344 transitions. [2022-01-18 15:33:34,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 344 transitions. [2022-01-18 15:33:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:34,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:34,120 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:34,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:34,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-01-18 15:33:34,320 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1712966304, now seen corresponding path program 198 times [2022-01-18 15:33:34,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:34,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875953832] [2022-01-18 15:33:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:34,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:34,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875953832] [2022-01-18 15:33:34,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875953832] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:34,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376256405] [2022-01-18 15:33:34,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:34,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:34,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:34,420 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:34,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-01-18 15:33:34,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:34,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:34,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:34,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:34,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:34,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:34,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:34,650 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:34,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:34,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:34,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376256405] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:34,679 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:34,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:34,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084900045] [2022-01-18 15:33:34,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:34,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:34,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:34,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:34,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:34,680 INFO L87 Difference]: Start difference. First operand 145 states and 344 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:34,811 INFO L93 Difference]: Finished difference Result 164 states and 380 transitions. [2022-01-18 15:33:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:34,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:34,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:34,812 INFO L225 Difference]: With dead ends: 164 [2022-01-18 15:33:34,812 INFO L226 Difference]: Without dead ends: 164 [2022-01-18 15:33:34,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:33:34,812 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:34,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 77 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:34,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-18 15:33:34,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2022-01-18 15:33:34,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3846153846153846) internal successors, (341), 143 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 341 transitions. [2022-01-18 15:33:34,814 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 341 transitions. Word has length 17 [2022-01-18 15:33:34,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:34,814 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 341 transitions. [2022-01-18 15:33:34,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 341 transitions. [2022-01-18 15:33:34,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:34,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:34,814 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:34,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-01-18 15:33:35,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:35,014 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:35,015 INFO L85 PathProgramCache]: Analyzing trace with hash -444199572, now seen corresponding path program 199 times [2022-01-18 15:33:35,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:35,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421166229] [2022-01-18 15:33:35,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:35,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:35,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:35,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421166229] [2022-01-18 15:33:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421166229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4124388] [2022-01-18 15:33:35,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:35,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:35,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:35,110 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:35,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-01-18 15:33:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:35,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:35,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:35,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:35,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:35,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:35,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:35,388 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:35,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:35,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:35,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4124388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:35,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:35,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:35,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539362664] [2022-01-18 15:33:35,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:35,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:35,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:35,415 INFO L87 Difference]: Start difference. First operand 144 states and 341 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:35,623 INFO L93 Difference]: Finished difference Result 234 states and 499 transitions. [2022-01-18 15:33:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:35,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:35,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:35,624 INFO L225 Difference]: With dead ends: 234 [2022-01-18 15:33:35,624 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 15:33:35,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:33:35,624 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:35,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 243 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 452 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:33:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 15:33:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 147. [2022-01-18 15:33:35,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.410958904109589) internal successors, (352), 146 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:35,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 352 transitions. [2022-01-18 15:33:35,626 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 352 transitions. Word has length 17 [2022-01-18 15:33:35,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:35,626 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 352 transitions. [2022-01-18 15:33:35,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:35,626 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 352 transitions. [2022-01-18 15:33:35,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:35,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:35,626 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:35,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:35,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:35,827 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:35,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:35,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1615403274, now seen corresponding path program 200 times [2022-01-18 15:33:35,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:35,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585193864] [2022-01-18 15:33:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:35,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:35,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:35,939 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:35,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585193864] [2022-01-18 15:33:35,939 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585193864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:35,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518002145] [2022-01-18 15:33:35,939 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:35,939 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:35,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:35,940 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:35,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-01-18 15:33:35,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:35,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:35,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:35,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:36,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:36,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:36,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:36,233 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:36,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:36,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518002145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:36,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:36,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927253647] [2022-01-18 15:33:36,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:36,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:36,265 INFO L87 Difference]: Start difference. First operand 147 states and 352 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:36,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:36,432 INFO L93 Difference]: Finished difference Result 207 states and 450 transitions. [2022-01-18 15:33:36,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:36,432 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:36,433 INFO L225 Difference]: With dead ends: 207 [2022-01-18 15:33:36,433 INFO L226 Difference]: Without dead ends: 198 [2022-01-18 15:33:36,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:33:36,433 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 39 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:36,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 239 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 318 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-01-18 15:33:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-18 15:33:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 153. [2022-01-18 15:33:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.3947368421052633) internal successors, (364), 152 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 364 transitions. [2022-01-18 15:33:36,435 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 364 transitions. Word has length 17 [2022-01-18 15:33:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:36,435 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 364 transitions. [2022-01-18 15:33:36,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:36,435 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 364 transitions. [2022-01-18 15:33:36,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:36,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:36,435 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:36,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:36,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable220 [2022-01-18 15:33:36,636 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:36,636 INFO L85 PathProgramCache]: Analyzing trace with hash -2033396862, now seen corresponding path program 201 times [2022-01-18 15:33:36,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:36,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758551954] [2022-01-18 15:33:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:36,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:36,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758551954] [2022-01-18 15:33:36,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758551954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:36,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817690703] [2022-01-18 15:33:36,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:36,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:36,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:36,738 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:36,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-01-18 15:33:36,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:36,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:36,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:36,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:36,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:36,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:36,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:36,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:37,039 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:37,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:37,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:37,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817690703] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:37,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:37,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:33:37,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061329575] [2022-01-18 15:33:37,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:37,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:33:37,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:33:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:33:37,082 INFO L87 Difference]: Start difference. First operand 153 states and 364 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:37,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:37,341 INFO L93 Difference]: Finished difference Result 218 states and 455 transitions. [2022-01-18 15:33:37,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:33:37,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:37,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:37,342 INFO L225 Difference]: With dead ends: 218 [2022-01-18 15:33:37,342 INFO L226 Difference]: Without dead ends: 212 [2022-01-18 15:33:37,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:33:37,342 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 47 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:37,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 285 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 503 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-01-18 15:33:37,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-18 15:33:37,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 153. [2022-01-18 15:33:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.3947368421052633) internal successors, (364), 152 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:37,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 364 transitions. [2022-01-18 15:33:37,344 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 364 transitions. Word has length 17 [2022-01-18 15:33:37,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:37,344 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 364 transitions. [2022-01-18 15:33:37,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:37,344 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 364 transitions. [2022-01-18 15:33:37,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:37,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:37,345 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:37,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-01-18 15:33:37,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-01-18 15:33:37,545 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:37,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1074171716, now seen corresponding path program 202 times [2022-01-18 15:33:37,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:37,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995196802] [2022-01-18 15:33:37,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:37,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:37,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995196802] [2022-01-18 15:33:37,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995196802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:37,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481500021] [2022-01-18 15:33:37,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:37,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:37,668 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-01-18 15:33:37,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:37,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:37,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:37,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:37,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:37,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:37,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:37,972 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:37,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:37,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:38,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481500021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:38,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:38,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:38,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20881798] [2022-01-18 15:33:38,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:38,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:38,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:38,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:38,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:38,001 INFO L87 Difference]: Start difference. First operand 153 states and 364 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:38,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:38,299 INFO L93 Difference]: Finished difference Result 234 states and 506 transitions. [2022-01-18 15:33:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:38,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:38,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:38,300 INFO L225 Difference]: With dead ends: 234 [2022-01-18 15:33:38,300 INFO L226 Difference]: Without dead ends: 228 [2022-01-18 15:33:38,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:38,300 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:38,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 240 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 392 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-18 15:33:38,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-18 15:33:38,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 150. [2022-01-18 15:33:38,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.442953020134228) internal successors, (364), 149 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 364 transitions. [2022-01-18 15:33:38,302 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 364 transitions. Word has length 17 [2022-01-18 15:33:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:38,302 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 364 transitions. [2022-01-18 15:33:38,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 364 transitions. [2022-01-18 15:33:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:38,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:38,302 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:38,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:38,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:38,503 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash 46552760, now seen corresponding path program 203 times [2022-01-18 15:33:38,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:38,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632443086] [2022-01-18 15:33:38,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:38,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:38,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:38,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632443086] [2022-01-18 15:33:38,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632443086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:38,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900670511] [2022-01-18 15:33:38,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:38,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:38,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:38,601 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:38,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-01-18 15:33:38,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:38,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:38,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:38,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:38,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:38,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:38,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:38,880 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:38,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:38,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:38,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900670511] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:38,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:38,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:38,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144301067] [2022-01-18 15:33:38,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:38,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:38,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:38,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:38,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:38,910 INFO L87 Difference]: Start difference. First operand 150 states and 364 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:39,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:39,223 INFO L93 Difference]: Finished difference Result 234 states and 505 transitions. [2022-01-18 15:33:39,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:39,223 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:39,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:39,223 INFO L225 Difference]: With dead ends: 234 [2022-01-18 15:33:39,223 INFO L226 Difference]: Without dead ends: 234 [2022-01-18 15:33:39,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:39,224 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:39,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 224 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 421 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-01-18 15:33:39,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-01-18 15:33:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 149. [2022-01-18 15:33:39,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.439189189189189) internal successors, (361), 148 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:39,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 361 transitions. [2022-01-18 15:33:39,226 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 361 transitions. Word has length 17 [2022-01-18 15:33:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:39,226 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 361 transitions. [2022-01-18 15:33:39,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:39,226 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 361 transitions. [2022-01-18 15:33:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:39,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:39,226 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:39,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-01-18 15:33:39,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-01-18 15:33:39,427 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:39,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1658994162, now seen corresponding path program 204 times [2022-01-18 15:33:39,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:39,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499860383] [2022-01-18 15:33:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:39,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:39,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499860383] [2022-01-18 15:33:39,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499860383] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:39,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531345957] [2022-01-18 15:33:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:39,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:39,534 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:39,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-01-18 15:33:39,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:33:39,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:39,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:39,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:39,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:39,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:39,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:39,846 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:39,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:39,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:39,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:39,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531345957] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:39,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:39,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:39,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166042508] [2022-01-18 15:33:39,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:39,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:39,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:39,879 INFO L87 Difference]: Start difference. First operand 149 states and 361 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:40,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:40,239 INFO L93 Difference]: Finished difference Result 202 states and 439 transitions. [2022-01-18 15:33:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:33:40,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:40,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:40,239 INFO L225 Difference]: With dead ends: 202 [2022-01-18 15:33:40,239 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 15:33:40,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:40,239 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:40,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 256 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 493 Invalid, 0 Unknown, 152 Unchecked, 0.2s Time] [2022-01-18 15:33:40,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 15:33:40,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 151. [2022-01-18 15:33:40,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.4133333333333336) internal successors, (362), 150 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:40,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 362 transitions. [2022-01-18 15:33:40,241 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 362 transitions. Word has length 17 [2022-01-18 15:33:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:40,241 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 362 transitions. [2022-01-18 15:33:40,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:40,241 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 362 transitions. [2022-01-18 15:33:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:40,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:40,242 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:40,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:40,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-01-18 15:33:40,442 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:40,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1812455380, now seen corresponding path program 205 times [2022-01-18 15:33:40,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:40,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066313356] [2022-01-18 15:33:40,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:40,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:40,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:40,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066313356] [2022-01-18 15:33:40,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066313356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:40,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078109427] [2022-01-18 15:33:40,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:40,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:40,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:40,561 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:40,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-01-18 15:33:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:40,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:40,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:40,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:40,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:40,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:40,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:40,914 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:40,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:40,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:40,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078109427] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:40,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:40,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:40,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349974857] [2022-01-18 15:33:40,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:40,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:40,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:40,948 INFO L87 Difference]: Start difference. First operand 151 states and 362 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:41,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:41,282 INFO L93 Difference]: Finished difference Result 194 states and 422 transitions. [2022-01-18 15:33:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:33:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:41,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:41,283 INFO L225 Difference]: With dead ends: 194 [2022-01-18 15:33:41,283 INFO L226 Difference]: Without dead ends: 186 [2022-01-18 15:33:41,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:41,283 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 57 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:41,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 193 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 464 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-01-18 15:33:41,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-18 15:33:41,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-01-18 15:33:41,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.418918918918919) internal successors, (358), 148 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:41,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 358 transitions. [2022-01-18 15:33:41,285 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 358 transitions. Word has length 17 [2022-01-18 15:33:41,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:41,285 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 358 transitions. [2022-01-18 15:33:41,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:41,285 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 358 transitions. [2022-01-18 15:33:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:41,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:41,285 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:41,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-01-18 15:33:41,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-01-18 15:33:41,486 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:41,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:41,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1122263916, now seen corresponding path program 206 times [2022-01-18 15:33:41,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:41,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017846781] [2022-01-18 15:33:41,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:41,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:41,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:41,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:41,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017846781] [2022-01-18 15:33:41,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017846781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628942824] [2022-01-18 15:33:41,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:41,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:41,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:41,575 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:41,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-01-18 15:33:41,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:41,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:41,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:41,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:41,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:41,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:41,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:41,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:41,843 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:41,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:41,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:41,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:41,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628942824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:41,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:41,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:41,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574512965] [2022-01-18 15:33:41,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:41,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:41,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:41,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:41,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:41,872 INFO L87 Difference]: Start difference. First operand 149 states and 358 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:42,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:42,227 INFO L93 Difference]: Finished difference Result 246 states and 504 transitions. [2022-01-18 15:33:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:33:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:42,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:42,228 INFO L225 Difference]: With dead ends: 246 [2022-01-18 15:33:42,228 INFO L226 Difference]: Without dead ends: 240 [2022-01-18 15:33:42,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:33:42,228 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:42,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 201 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 466 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-01-18 15:33:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-18 15:33:42,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 140. [2022-01-18 15:33:42,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.3597122302158273) internal successors, (328), 139 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 328 transitions. [2022-01-18 15:33:42,230 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 328 transitions. Word has length 17 [2022-01-18 15:33:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:42,230 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 328 transitions. [2022-01-18 15:33:42,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:42,230 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 328 transitions. [2022-01-18 15:33:42,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:42,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:42,230 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:42,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-01-18 15:33:42,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:42,431 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:42,431 INFO L85 PathProgramCache]: Analyzing trace with hash 2041714550, now seen corresponding path program 207 times [2022-01-18 15:33:42,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:42,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468396470] [2022-01-18 15:33:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:42,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:42,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:42,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:42,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468396470] [2022-01-18 15:33:42,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468396470] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:42,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737122347] [2022-01-18 15:33:42,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:42,526 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:42,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:42,526 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:42,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-01-18 15:33:42,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:42,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:42,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:42,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:42,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:42,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:42,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:42,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:42,826 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:42,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:42,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:42,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737122347] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:42,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:42,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:42,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833205244] [2022-01-18 15:33:42,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:42,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:42,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:42,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:42,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:42,859 INFO L87 Difference]: Start difference. First operand 140 states and 328 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:43,279 INFO L93 Difference]: Finished difference Result 224 states and 460 transitions. [2022-01-18 15:33:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:33:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:43,280 INFO L225 Difference]: With dead ends: 224 [2022-01-18 15:33:43,280 INFO L226 Difference]: Without dead ends: 215 [2022-01-18 15:33:43,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=889, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:33:43,280 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 114 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:43,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 135 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 348 Invalid, 0 Unknown, 40 Unchecked, 0.1s Time] [2022-01-18 15:33:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-18 15:33:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 141. [2022-01-18 15:33:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.357142857142857) internal successors, (330), 140 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 330 transitions. [2022-01-18 15:33:43,282 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 330 transitions. Word has length 17 [2022-01-18 15:33:43,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:43,282 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 330 transitions. [2022-01-18 15:33:43,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:43,282 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 330 transitions. [2022-01-18 15:33:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:43,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:43,283 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:43,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-01-18 15:33:43,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-01-18 15:33:43,483 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:43,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:43,483 INFO L85 PathProgramCache]: Analyzing trace with hash 535348314, now seen corresponding path program 208 times [2022-01-18 15:33:43,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:43,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119571881] [2022-01-18 15:33:43,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:43,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:43,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:43,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:43,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119571881] [2022-01-18 15:33:43,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119571881] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:43,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519392525] [2022-01-18 15:33:43,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:43,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:43,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:43,580 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:43,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-01-18 15:33:43,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:43,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:43,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:43,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:43,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:43,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:43,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:43,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:43,859 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:43,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:43,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:43,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519392525] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:43,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:43,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:43,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903889947] [2022-01-18 15:33:43,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:43,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:43,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:43,887 INFO L87 Difference]: Start difference. First operand 141 states and 330 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:44,230 INFO L93 Difference]: Finished difference Result 164 states and 368 transitions. [2022-01-18 15:33:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:44,231 INFO L225 Difference]: With dead ends: 164 [2022-01-18 15:33:44,231 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 15:33:44,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:33:44,231 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:44,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 93 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 339 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-01-18 15:33:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 15:33:44,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 141. [2022-01-18 15:33:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.342857142857143) internal successors, (328), 140 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 328 transitions. [2022-01-18 15:33:44,233 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 328 transitions. Word has length 17 [2022-01-18 15:33:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:44,233 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 328 transitions. [2022-01-18 15:33:44,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:44,233 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 328 transitions. [2022-01-18 15:33:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:44,233 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:44,233 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:44,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-01-18 15:33:44,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:44,433 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:44,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:44,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1132528270, now seen corresponding path program 209 times [2022-01-18 15:33:44,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:44,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222962846] [2022-01-18 15:33:44,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:44,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:44,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222962846] [2022-01-18 15:33:44,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222962846] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:44,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253090680] [2022-01-18 15:33:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:44,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:44,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:44,538 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:44,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-01-18 15:33:44,560 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:33:44,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:44,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:44,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:44,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:44,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:44,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:44,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:44,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:44,810 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:44,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:44,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253090680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:44,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:44,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:44,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469434695] [2022-01-18 15:33:44,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:44,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:44,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:44,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:44,843 INFO L87 Difference]: Start difference. First operand 141 states and 328 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:45,085 INFO L93 Difference]: Finished difference Result 163 states and 370 transitions. [2022-01-18 15:33:45,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:33:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:45,085 INFO L225 Difference]: With dead ends: 163 [2022-01-18 15:33:45,085 INFO L226 Difference]: Without dead ends: 163 [2022-01-18 15:33:45,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:33:45,086 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:45,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 56 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 204 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-18 15:33:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-18 15:33:45,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2022-01-18 15:33:45,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.338235294117647) internal successors, (318), 136 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 318 transitions. [2022-01-18 15:33:45,087 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 318 transitions. Word has length 17 [2022-01-18 15:33:45,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:45,087 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 318 transitions. [2022-01-18 15:33:45,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,087 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 318 transitions. [2022-01-18 15:33:45,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:45,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:45,088 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:45,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:45,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:45,303 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:45,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1219126036, now seen corresponding path program 210 times [2022-01-18 15:33:45,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428182513] [2022-01-18 15:33:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:45,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:45,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428182513] [2022-01-18 15:33:45,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428182513] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:45,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806385876] [2022-01-18 15:33:45,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:45,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:45,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:45,396 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:45,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-01-18 15:33:45,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:45,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:45,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:45,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:45,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:45,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:45,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:45,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:45,612 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:45,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:45,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:45,650 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:45,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806385876] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:45,650 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:45,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:45,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860456519] [2022-01-18 15:33:45,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:45,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:45,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:45,651 INFO L87 Difference]: Start difference. First operand 137 states and 318 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:45,794 INFO L93 Difference]: Finished difference Result 195 states and 419 transitions. [2022-01-18 15:33:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:45,795 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:33:45,795 INFO L226 Difference]: Without dead ends: 195 [2022-01-18 15:33:45,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:45,795 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:45,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 94 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-18 15:33:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 140. [2022-01-18 15:33:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.3597122302158273) internal successors, (328), 139 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 328 transitions. [2022-01-18 15:33:45,797 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 328 transitions. Word has length 17 [2022-01-18 15:33:45,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:45,797 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 328 transitions. [2022-01-18 15:33:45,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:45,797 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 328 transitions. [2022-01-18 15:33:45,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:45,797 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:45,797 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:45,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:45,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable230 [2022-01-18 15:33:45,998 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:45,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:45,998 INFO L85 PathProgramCache]: Analyzing trace with hash -299675402, now seen corresponding path program 211 times [2022-01-18 15:33:45,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:45,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560648856] [2022-01-18 15:33:45,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:45,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:46,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560648856] [2022-01-18 15:33:46,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560648856] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743406956] [2022-01-18 15:33:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:46,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:46,097 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:46,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-01-18 15:33:46,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:46,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:46,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:46,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:46,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:46,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:46,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:46,312 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:46,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:46,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:46,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:46,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743406956] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:46,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:46,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:46,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816510349] [2022-01-18 15:33:46,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:46,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:46,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:46,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:46,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:46,345 INFO L87 Difference]: Start difference. First operand 140 states and 328 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:46,580 INFO L93 Difference]: Finished difference Result 206 states and 441 transitions. [2022-01-18 15:33:46,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:46,580 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:46,580 INFO L225 Difference]: With dead ends: 206 [2022-01-18 15:33:46,580 INFO L226 Difference]: Without dead ends: 200 [2022-01-18 15:33:46,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:33:46,580 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:46,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 104 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:46,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-18 15:33:46,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2022-01-18 15:33:46,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 141 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 333 transitions. [2022-01-18 15:33:46,582 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 333 transitions. Word has length 17 [2022-01-18 15:33:46,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:46,582 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 333 transitions. [2022-01-18 15:33:46,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:46,582 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 333 transitions. [2022-01-18 15:33:46,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:46,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:46,583 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:46,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-01-18 15:33:46,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:46,783 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:46,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:46,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1806041638, now seen corresponding path program 212 times [2022-01-18 15:33:46,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:46,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425920435] [2022-01-18 15:33:46,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:46,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:46,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:46,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:46,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425920435] [2022-01-18 15:33:46,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425920435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:46,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181106602] [2022-01-18 15:33:46,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:46,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:46,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:46,882 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:46,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-01-18 15:33:46,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:46,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:46,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:46,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:46,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:46,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:46,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:46,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:47,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:47,119 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:47,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:47,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:47,160 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:47,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181106602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:47,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:47,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:47,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399360806] [2022-01-18 15:33:47,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:47,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:47,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:47,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:47,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:47,161 INFO L87 Difference]: Start difference. First operand 142 states and 333 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:47,436 INFO L93 Difference]: Finished difference Result 178 states and 390 transitions. [2022-01-18 15:33:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:33:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:47,437 INFO L225 Difference]: With dead ends: 178 [2022-01-18 15:33:47,437 INFO L226 Difference]: Without dead ends: 174 [2022-01-18 15:33:47,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:33:47,437 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:47,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 116 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:33:47,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-18 15:33:47,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 142. [2022-01-18 15:33:47,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.347517730496454) internal successors, (331), 141 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:47,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 331 transitions. [2022-01-18 15:33:47,439 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 331 transitions. Word has length 17 [2022-01-18 15:33:47,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:47,439 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 331 transitions. [2022-01-18 15:33:47,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:47,439 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 331 transitions. [2022-01-18 15:33:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:47,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:47,439 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:47,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:47,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:47,655 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 821049074, now seen corresponding path program 213 times [2022-01-18 15:33:47,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:47,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792530960] [2022-01-18 15:33:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:47,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:47,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792530960] [2022-01-18 15:33:47,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792530960] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:47,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528125974] [2022-01-18 15:33:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:47,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:47,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:47,757 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:47,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-01-18 15:33:47,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:47,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:47,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:47,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:47,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:47,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:47,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:47,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:47,976 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:47,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:47,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:48,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:48,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528125974] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:48,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:48,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:48,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613441137] [2022-01-18 15:33:48,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:48,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:48,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:48,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:48,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:48,010 INFO L87 Difference]: Start difference. First operand 142 states and 331 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:48,156 INFO L93 Difference]: Finished difference Result 190 states and 418 transitions. [2022-01-18 15:33:48,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:48,156 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:48,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:48,157 INFO L225 Difference]: With dead ends: 190 [2022-01-18 15:33:48,157 INFO L226 Difference]: Without dead ends: 190 [2022-01-18 15:33:48,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:33:48,157 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:48,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 92 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 243 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2022-01-18 15:33:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-01-18 15:33:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2022-01-18 15:33:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.359154929577465) internal successors, (335), 142 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 335 transitions. [2022-01-18 15:33:48,159 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 335 transitions. Word has length 17 [2022-01-18 15:33:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:48,159 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 335 transitions. [2022-01-18 15:33:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 335 transitions. [2022-01-18 15:33:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:48,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:48,159 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:48,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:48,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-01-18 15:33:48,360 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1896760230, now seen corresponding path program 214 times [2022-01-18 15:33:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208109477] [2022-01-18 15:33:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:48,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:48,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:48,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208109477] [2022-01-18 15:33:48,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208109477] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:48,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464605155] [2022-01-18 15:33:48,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:48,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:48,465 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:48,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-01-18 15:33:48,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:48,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:48,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:48,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:48,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:48,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:48,703 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:48,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:48,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:48,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:48,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464605155] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:48,737 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:48,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:48,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425701951] [2022-01-18 15:33:48,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:48,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:48,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:48,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:48,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:48,738 INFO L87 Difference]: Start difference. First operand 143 states and 335 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:48,906 INFO L93 Difference]: Finished difference Result 171 states and 386 transitions. [2022-01-18 15:33:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:48,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:48,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:48,907 INFO L225 Difference]: With dead ends: 171 [2022-01-18 15:33:48,907 INFO L226 Difference]: Without dead ends: 171 [2022-01-18 15:33:48,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:48,907 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:48,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 102 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 376 Invalid, 0 Unknown, 24 Unchecked, 0.1s Time] [2022-01-18 15:33:48,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-18 15:33:48,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 140. [2022-01-18 15:33:48,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.338129496402878) internal successors, (325), 139 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 325 transitions. [2022-01-18 15:33:48,909 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 325 transitions. Word has length 17 [2022-01-18 15:33:48,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:48,909 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 325 transitions. [2022-01-18 15:33:48,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:48,909 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 325 transitions. [2022-01-18 15:33:48,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:48,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:48,909 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:48,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-01-18 15:33:49,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-01-18 15:33:49,110 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:49,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -642816196, now seen corresponding path program 215 times [2022-01-18 15:33:49,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:49,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55646391] [2022-01-18 15:33:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:49,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:49,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:49,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:49,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:49,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55646391] [2022-01-18 15:33:49,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55646391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:49,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911995589] [2022-01-18 15:33:49,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:49,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:49,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:49,213 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:49,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-01-18 15:33:49,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:33:49,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:49,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:49,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:49,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:33:49,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:33:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:49,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:49,470 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:49,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:49,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:49,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:49,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911995589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:49,505 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:49,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:49,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095449496] [2022-01-18 15:33:49,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:49,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:49,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:49,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:49,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:49,506 INFO L87 Difference]: Start difference. First operand 140 states and 325 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:49,728 INFO L93 Difference]: Finished difference Result 205 states and 448 transitions. [2022-01-18 15:33:49,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:33:49,728 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:49,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:49,729 INFO L225 Difference]: With dead ends: 205 [2022-01-18 15:33:49,729 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 15:33:49,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:33:49,729 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 50 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:49,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 184 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 453 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-01-18 15:33:49,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 15:33:49,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 143. [2022-01-18 15:33:49,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.3661971830985915) internal successors, (336), 142 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:49,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 336 transitions. [2022-01-18 15:33:49,731 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 336 transitions. Word has length 17 [2022-01-18 15:33:49,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:49,731 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 336 transitions. [2022-01-18 15:33:49,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:49,731 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 336 transitions. [2022-01-18 15:33:49,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:49,731 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:49,731 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:49,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:49,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-01-18 15:33:49,932 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:49,932 INFO L85 PathProgramCache]: Analyzing trace with hash 2090349682, now seen corresponding path program 216 times [2022-01-18 15:33:49,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:49,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230980010] [2022-01-18 15:33:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:49,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:49,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:50,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:50,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230980010] [2022-01-18 15:33:50,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230980010] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:50,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688216431] [2022-01-18 15:33:50,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:50,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:50,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:50,033 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:50,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-01-18 15:33:50,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:50,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:50,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:50,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:50,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:33:50,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:33:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:50,305 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:50,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:50,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688216431] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:50,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:50,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:50,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980037483] [2022-01-18 15:33:50,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:50,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:50,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:50,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:50,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:50,349 INFO L87 Difference]: Start difference. First operand 143 states and 336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:50,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:50,517 INFO L93 Difference]: Finished difference Result 192 states and 412 transitions. [2022-01-18 15:33:50,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:50,518 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:50,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:50,518 INFO L225 Difference]: With dead ends: 192 [2022-01-18 15:33:50,518 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 15:33:50,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:50,518 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:50,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 201 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 341 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-01-18 15:33:50,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 15:33:50,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 143. [2022-01-18 15:33:50,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.359154929577465) internal successors, (335), 142 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:50,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 335 transitions. [2022-01-18 15:33:50,520 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 335 transitions. Word has length 17 [2022-01-18 15:33:50,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:50,520 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 335 transitions. [2022-01-18 15:33:50,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:50,520 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 335 transitions. [2022-01-18 15:33:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:50,520 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:50,520 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:50,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:50,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:50,721 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:50,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:50,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1553619436, now seen corresponding path program 217 times [2022-01-18 15:33:50,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:50,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132376543] [2022-01-18 15:33:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:50,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132376543] [2022-01-18 15:33:50,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132376543] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:50,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190216269] [2022-01-18 15:33:50,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:50,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:50,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:50,831 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:50,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-01-18 15:33:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:50,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:50,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:50,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:50,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:50,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:50,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:51,053 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:51,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:51,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:51,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190216269] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:51,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:51,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:51,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522845405] [2022-01-18 15:33:51,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:51,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:51,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:51,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:51,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:51,088 INFO L87 Difference]: Start difference. First operand 143 states and 335 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:51,297 INFO L93 Difference]: Finished difference Result 251 states and 524 transitions. [2022-01-18 15:33:51,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:51,298 INFO L225 Difference]: With dead ends: 251 [2022-01-18 15:33:51,298 INFO L226 Difference]: Without dead ends: 251 [2022-01-18 15:33:51,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:33:51,298 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:51,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 238 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 474 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-01-18 15:33:51,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-18 15:33:51,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 144. [2022-01-18 15:33:51,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.370629370629371) internal successors, (339), 143 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:51,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 339 transitions. [2022-01-18 15:33:51,300 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 339 transitions. Word has length 17 [2022-01-18 15:33:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:51,300 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 339 transitions. [2022-01-18 15:33:51,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:51,300 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 339 transitions. [2022-01-18 15:33:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:51,300 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:51,300 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:51,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-01-18 15:33:51,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-01-18 15:33:51,501 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:51,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:51,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1821897226, now seen corresponding path program 218 times [2022-01-18 15:33:51,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:51,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369730396] [2022-01-18 15:33:51,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:51,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:51,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369730396] [2022-01-18 15:33:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369730396] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262697722] [2022-01-18 15:33:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:51,588 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:51,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:51,589 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:51,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-01-18 15:33:51,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:51,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:51,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:51,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:51,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:51,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:51,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:51,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:51,817 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:51,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:51,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:51,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262697722] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:51,855 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:51,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:51,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575676529] [2022-01-18 15:33:51,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:51,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:51,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:51,856 INFO L87 Difference]: Start difference. First operand 144 states and 339 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:52,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:52,246 INFO L93 Difference]: Finished difference Result 245 states and 498 transitions. [2022-01-18 15:33:52,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:33:52,247 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:52,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:52,247 INFO L225 Difference]: With dead ends: 245 [2022-01-18 15:33:52,247 INFO L226 Difference]: Without dead ends: 239 [2022-01-18 15:33:52,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:33:52,247 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 78 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:52,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 215 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 475 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-01-18 15:33:52,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-18 15:33:52,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 144. [2022-01-18 15:33:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3636363636363638) internal successors, (338), 143 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:52,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 338 transitions. [2022-01-18 15:33:52,249 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 338 transitions. Word has length 17 [2022-01-18 15:33:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:52,249 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 338 transitions. [2022-01-18 15:33:52,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:52,249 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 338 transitions. [2022-01-18 15:33:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:52,250 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:52,250 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:52,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:52,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:52,450 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 966703834, now seen corresponding path program 219 times [2022-01-18 15:33:52,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:52,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701809970] [2022-01-18 15:33:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:52,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:52,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701809970] [2022-01-18 15:33:52,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701809970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:52,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918744194] [2022-01-18 15:33:52,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:52,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:52,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:52,537 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:52,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-01-18 15:33:52,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:33:52,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:52,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:52,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:52,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:52,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:52,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:52,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:52,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:52,775 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:52,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:52,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:52,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918744194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:52,810 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:52,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:52,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735306412] [2022-01-18 15:33:52,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:52,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:52,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:52,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:52,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:52,811 INFO L87 Difference]: Start difference. First operand 144 states and 338 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:53,107 INFO L93 Difference]: Finished difference Result 250 states and 513 transitions. [2022-01-18 15:33:53,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:33:53,107 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:53,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:53,107 INFO L225 Difference]: With dead ends: 250 [2022-01-18 15:33:53,107 INFO L226 Difference]: Without dead ends: 246 [2022-01-18 15:33:53,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:33:53,108 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:53,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 177 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 445 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-01-18 15:33:53,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-01-18 15:33:53,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 144. [2022-01-18 15:33:53,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3566433566433567) internal successors, (337), 143 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 337 transitions. [2022-01-18 15:33:53,110 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 337 transitions. Word has length 17 [2022-01-18 15:33:53,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:53,110 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 337 transitions. [2022-01-18 15:33:53,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,110 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 337 transitions. [2022-01-18 15:33:53,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:53,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:53,110 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:53,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-01-18 15:33:53,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-01-18 15:33:53,310 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:53,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:53,311 INFO L85 PathProgramCache]: Analyzing trace with hash -701172750, now seen corresponding path program 220 times [2022-01-18 15:33:53,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:53,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752873963] [2022-01-18 15:33:53,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:53,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:53,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:53,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752873963] [2022-01-18 15:33:53,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752873963] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:53,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632966366] [2022-01-18 15:33:53,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:53,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:53,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:53,405 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:53,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-01-18 15:33:53,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:53,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:53,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:53,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:53,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:53,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:53,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:53,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:53,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:53,616 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:53,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:53,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:53,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:53,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632966366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:53,654 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:53,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:53,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963320054] [2022-01-18 15:33:53,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:53,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:53,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:53,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:53,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:53,655 INFO L87 Difference]: Start difference. First operand 144 states and 337 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:53,876 INFO L93 Difference]: Finished difference Result 200 states and 433 transitions. [2022-01-18 15:33:53,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:53,876 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:53,876 INFO L225 Difference]: With dead ends: 200 [2022-01-18 15:33:53,876 INFO L226 Difference]: Without dead ends: 200 [2022-01-18 15:33:53,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:33:53,877 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:53,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 137 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 327 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-01-18 15:33:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-18 15:33:53,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 142. [2022-01-18 15:33:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 141 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 333 transitions. [2022-01-18 15:33:53,878 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 333 transitions. Word has length 17 [2022-01-18 15:33:53,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:53,878 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 333 transitions. [2022-01-18 15:33:53,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:53,878 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 333 transitions. [2022-01-18 15:33:53,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:53,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:53,879 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:53,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:54,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:54,080 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:54,080 INFO L85 PathProgramCache]: Analyzing trace with hash 540926904, now seen corresponding path program 221 times [2022-01-18 15:33:54,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:54,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338717749] [2022-01-18 15:33:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:54,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:54,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:54,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338717749] [2022-01-18 15:33:54,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338717749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:54,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013788393] [2022-01-18 15:33:54,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:54,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:54,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:54,189 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:54,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-01-18 15:33:54,211 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:33:54,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:54,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:54,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:54,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:54,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:54,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:54,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:54,409 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:54,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:54,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:54,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:54,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013788393] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:54,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:54,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:54,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366888114] [2022-01-18 15:33:54,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:54,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:54,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:54,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:54,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:54,449 INFO L87 Difference]: Start difference. First operand 142 states and 333 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:54,699 INFO L93 Difference]: Finished difference Result 214 states and 443 transitions. [2022-01-18 15:33:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:33:54,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:54,700 INFO L225 Difference]: With dead ends: 214 [2022-01-18 15:33:54,700 INFO L226 Difference]: Without dead ends: 208 [2022-01-18 15:33:54,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:33:54,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:54,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 131 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:54,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-18 15:33:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 140. [2022-01-18 15:33:54,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.338129496402878) internal successors, (325), 139 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 325 transitions. [2022-01-18 15:33:54,702 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 325 transitions. Word has length 17 [2022-01-18 15:33:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:54,702 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 325 transitions. [2022-01-18 15:33:54,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:54,702 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 325 transitions. [2022-01-18 15:33:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:54,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:54,702 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:54,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Forceful destruction successful, exit code 0 [2022-01-18 15:33:54,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:54,903 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:54,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1460377538, now seen corresponding path program 222 times [2022-01-18 15:33:54,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:54,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355045422] [2022-01-18 15:33:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:54,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:55,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355045422] [2022-01-18 15:33:55,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355045422] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:55,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895524026] [2022-01-18 15:33:55,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:33:55,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:55,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:55,004 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:55,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-01-18 15:33:55,026 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:33:55,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:55,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:55,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:55,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:55,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:55,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:55,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:55,159 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:55,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:55,236 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:55,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:55,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:55,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895524026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:55,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:55,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:55,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463171112] [2022-01-18 15:33:55,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:55,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:55,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:55,271 INFO L87 Difference]: Start difference. First operand 140 states and 325 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:55,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:55,867 INFO L93 Difference]: Finished difference Result 299 states and 577 transitions. [2022-01-18 15:33:55,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 15:33:55,868 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:55,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:55,868 INFO L225 Difference]: With dead ends: 299 [2022-01-18 15:33:55,868 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 15:33:55,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:33:55,868 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 172 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:55,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 148 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:33:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 15:33:55,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 142. [2022-01-18 15:33:55,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:55,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2022-01-18 15:33:55,870 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 17 [2022-01-18 15:33:55,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:55,870 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2022-01-18 15:33:55,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:55,870 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2022-01-18 15:33:55,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:55,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:55,870 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:55,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-01-18 15:33:56,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:56,071 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:56,071 INFO L85 PathProgramCache]: Analyzing trace with hash -45988698, now seen corresponding path program 223 times [2022-01-18 15:33:56,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:56,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525408710] [2022-01-18 15:33:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:56,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:56,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:56,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525408710] [2022-01-18 15:33:56,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525408710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:56,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419863182] [2022-01-18 15:33:56,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:33:56,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:56,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:56,169 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:56,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-01-18 15:33:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:56,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:56,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:56,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:56,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:56,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:56,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:56,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:56,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:56,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:56,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:33:56,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:56,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419863182] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:56,431 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:56,432 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:56,432 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754693008] [2022-01-18 15:33:56,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:56,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:56,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:56,432 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:56,757 INFO L93 Difference]: Finished difference Result 190 states and 403 transitions. [2022-01-18 15:33:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:33:56,757 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:56,758 INFO L225 Difference]: With dead ends: 190 [2022-01-18 15:33:56,758 INFO L226 Difference]: Without dead ends: 186 [2022-01-18 15:33:56,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:33:56,758 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:56,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 121 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:33:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-18 15:33:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 142. [2022-01-18 15:33:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.326241134751773) internal successors, (328), 141 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 328 transitions. [2022-01-18 15:33:56,760 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 328 transitions. Word has length 17 [2022-01-18 15:33:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:56,760 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 328 transitions. [2022-01-18 15:33:56,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 328 transitions. [2022-01-18 15:33:56,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:56,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:56,760 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:56,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-01-18 15:33:56,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-01-18 15:33:56,960 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:56,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1713865282, now seen corresponding path program 224 times [2022-01-18 15:33:56,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:56,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41690382] [2022-01-18 15:33:56,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:56,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:56,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:57,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:57,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41690382] [2022-01-18 15:33:57,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41690382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:57,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229527092] [2022-01-18 15:33:57,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:33:57,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:57,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:57,063 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:57,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-01-18 15:33:57,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:33:57,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:57,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:57,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:57,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:57,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:57,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:57,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:57,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:57,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:57,286 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:57,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:57,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:57,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229527092] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:57,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:57,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:57,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396250958] [2022-01-18 15:33:57,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:57,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:57,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:57,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:57,321 INFO L87 Difference]: Start difference. First operand 142 states and 328 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:57,639 INFO L93 Difference]: Finished difference Result 198 states and 424 transitions. [2022-01-18 15:33:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:33:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:57,640 INFO L225 Difference]: With dead ends: 198 [2022-01-18 15:33:57,640 INFO L226 Difference]: Without dead ends: 198 [2022-01-18 15:33:57,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:33:57,640 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:57,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 301 Invalid, 0 Unknown, 14 Unchecked, 0.1s Time] [2022-01-18 15:33:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-01-18 15:33:57,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 137. [2022-01-18 15:33:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2941176470588234) internal successors, (312), 136 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 312 transitions. [2022-01-18 15:33:57,642 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 312 transitions. Word has length 17 [2022-01-18 15:33:57,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:57,642 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 312 transitions. [2022-01-18 15:33:57,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:57,642 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 312 transitions. [2022-01-18 15:33:57,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:57,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:57,642 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:57,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-01-18 15:33:57,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-01-18 15:33:57,843 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:57,843 INFO L85 PathProgramCache]: Analyzing trace with hash -638154126, now seen corresponding path program 225 times [2022-01-18 15:33:57,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:57,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137629829] [2022-01-18 15:33:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:57,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:57,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:57,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137629829] [2022-01-18 15:33:57,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137629829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:57,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518036020] [2022-01-18 15:33:57,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:33:57,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:57,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:57,955 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:57,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-01-18 15:33:57,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:33:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:57,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:57,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:58,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:33:58,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:33:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:58,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:58,185 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:33:58,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:33:58,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:33:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:33:58,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518036020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:58,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:58,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2022-01-18 15:33:58,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138283393] [2022-01-18 15:33:58,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:58,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:33:58,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:33:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:33:58,220 INFO L87 Difference]: Start difference. First operand 137 states and 312 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:58,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:58,414 INFO L93 Difference]: Finished difference Result 179 states and 389 transitions. [2022-01-18 15:33:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:33:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:58,415 INFO L225 Difference]: With dead ends: 179 [2022-01-18 15:33:58,415 INFO L226 Difference]: Without dead ends: 179 [2022-01-18 15:33:58,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:33:58,415 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:58,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 110 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 337 Invalid, 0 Unknown, 3 Unchecked, 0.1s Time] [2022-01-18 15:33:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-18 15:33:58,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 131. [2022-01-18 15:33:58,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.269230769230769) internal successors, (295), 130 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 295 transitions. [2022-01-18 15:33:58,417 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 295 transitions. Word has length 17 [2022-01-18 15:33:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:58,417 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 295 transitions. [2022-01-18 15:33:58,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:58,417 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 295 transitions. [2022-01-18 15:33:58,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:58,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:58,417 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:58,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-01-18 15:33:58,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-01-18 15:33:58,623 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:58,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash -787770516, now seen corresponding path program 226 times [2022-01-18 15:33:58,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:58,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211296081] [2022-01-18 15:33:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:58,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:58,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:58,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:58,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211296081] [2022-01-18 15:33:58,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211296081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:58,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351003813] [2022-01-18 15:33:58,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:33:58,720 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:58,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:58,721 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:58,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-01-18 15:33:58,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:33:58,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:58,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:58,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:33:58,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:58,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:33:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:58,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:59,012 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:59,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:33:59,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:33:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:59,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351003813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:59,045 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:59,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:59,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869805702] [2022-01-18 15:33:59,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:59,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:59,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:59,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:59,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:59,046 INFO L87 Difference]: Start difference. First operand 131 states and 295 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:59,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:33:59,239 INFO L93 Difference]: Finished difference Result 199 states and 415 transitions. [2022-01-18 15:33:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:33:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:33:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:33:59,239 INFO L225 Difference]: With dead ends: 199 [2022-01-18 15:33:59,239 INFO L226 Difference]: Without dead ends: 199 [2022-01-18 15:33:59,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:33:59,240 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 84 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:33:59,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 128 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 263 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-01-18 15:33:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-18 15:33:59,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2022-01-18 15:33:59,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.293233082706767) internal successors, (305), 133 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:59,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 305 transitions. [2022-01-18 15:33:59,241 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 305 transitions. Word has length 17 [2022-01-18 15:33:59,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:33:59,241 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 305 transitions. [2022-01-18 15:33:59,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:33:59,241 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 305 transitions. [2022-01-18 15:33:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:33:59,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:33:59,242 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:33:59,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-01-18 15:33:59,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable246,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:59,442 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:33:59,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:33:59,442 INFO L85 PathProgramCache]: Analyzing trace with hash 131680118, now seen corresponding path program 227 times [2022-01-18 15:33:59,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:33:59,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561180808] [2022-01-18 15:33:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:33:59,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:33:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:33:59,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:59,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:33:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561180808] [2022-01-18 15:33:59,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561180808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:33:59,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132045097] [2022-01-18 15:33:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:33:59,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:33:59,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:33:59,534 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:33:59,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-01-18 15:33:59,556 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:33:59,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:33:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:33:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:33:59,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:59,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:33:59,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:33:59,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:33:59,718 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:59,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:33:59,810 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:33:59,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:33:59,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:33:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:33:59,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132045097] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:33:59,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:33:59,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:33:59,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673829532] [2022-01-18 15:33:59,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:33:59,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:33:59,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:33:59,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:33:59,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:33:59,840 INFO L87 Difference]: Start difference. First operand 134 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:00,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:00,159 INFO L93 Difference]: Finished difference Result 173 states and 365 transitions. [2022-01-18 15:34:00,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:34:00,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:00,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:00,159 INFO L225 Difference]: With dead ends: 173 [2022-01-18 15:34:00,160 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 15:34:00,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:34:00,160 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:00,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 135 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 253 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-01-18 15:34:00,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 15:34:00,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 134. [2022-01-18 15:34:00,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2857142857142856) internal successors, (304), 133 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 304 transitions. [2022-01-18 15:34:00,161 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 304 transitions. Word has length 17 [2022-01-18 15:34:00,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:00,161 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 304 transitions. [2022-01-18 15:34:00,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 304 transitions. [2022-01-18 15:34:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:00,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:00,162 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:00,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:00,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-01-18 15:34:00,377 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:00,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:00,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1374686118, now seen corresponding path program 228 times [2022-01-18 15:34:00,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:00,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047145090] [2022-01-18 15:34:00,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:00,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:00,469 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:00,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047145090] [2022-01-18 15:34:00,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047145090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:00,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704689026] [2022-01-18 15:34:00,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:00,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:00,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:00,470 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:00,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-01-18 15:34:00,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:00,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:00,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:00,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:00,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:00,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:00,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:00,769 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:00,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:00,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:00,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:00,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704689026] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:00,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:00,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:34:00,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613298843] [2022-01-18 15:34:00,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:00,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:34:00,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:00,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:34:00,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:00,804 INFO L87 Difference]: Start difference. First operand 134 states and 304 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:01,125 INFO L93 Difference]: Finished difference Result 197 states and 405 transitions. [2022-01-18 15:34:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:34:01,125 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:01,126 INFO L225 Difference]: With dead ends: 197 [2022-01-18 15:34:01,126 INFO L226 Difference]: Without dead ends: 193 [2022-01-18 15:34:01,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:01,126 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:01,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 181 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 412 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-01-18 15:34:01,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-18 15:34:01,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 134. [2022-01-18 15:34:01,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2781954887218046) internal successors, (303), 133 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 303 transitions. [2022-01-18 15:34:01,128 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 303 transitions. Word has length 17 [2022-01-18 15:34:01,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:01,128 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 303 transitions. [2022-01-18 15:34:01,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 303 transitions. [2022-01-18 15:34:01,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:01,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:01,128 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:01,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-01-18 15:34:01,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2022-01-18 15:34:01,329 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:01,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:01,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1252404594, now seen corresponding path program 229 times [2022-01-18 15:34:01,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:01,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106655384] [2022-01-18 15:34:01,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:01,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:01,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106655384] [2022-01-18 15:34:01,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106655384] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:01,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710738794] [2022-01-18 15:34:01,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:01,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:01,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:01,420 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:01,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-01-18 15:34:01,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:01,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:01,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:01,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:01,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:01,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:01,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:01,671 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:01,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:01,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:01,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710738794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:01,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:01,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:34:01,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958313586] [2022-01-18 15:34:01,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:01,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:34:01,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:01,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:34:01,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:01,703 INFO L87 Difference]: Start difference. First operand 134 states and 303 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:02,001 INFO L93 Difference]: Finished difference Result 158 states and 354 transitions. [2022-01-18 15:34:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:34:02,002 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:02,002 INFO L225 Difference]: With dead ends: 158 [2022-01-18 15:34:02,002 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 15:34:02,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:02,002 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:02,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 235 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-01-18 15:34:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 15:34:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 137. [2022-01-18 15:34:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2941176470588234) internal successors, (312), 136 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 312 transitions. [2022-01-18 15:34:02,004 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 312 transitions. Word has length 17 [2022-01-18 15:34:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:02,004 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 312 transitions. [2022-01-18 15:34:02,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 312 transitions. [2022-01-18 15:34:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:02,004 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:02,004 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:02,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-01-18 15:34:02,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-01-18 15:34:02,205 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:02,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1909915920, now seen corresponding path program 230 times [2022-01-18 15:34:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:02,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207479735] [2022-01-18 15:34:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:02,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:02,319 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:02,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:02,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207479735] [2022-01-18 15:34:02,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207479735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:02,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916314812] [2022-01-18 15:34:02,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:02,320 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:02,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:02,321 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:02,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-01-18 15:34:02,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:02,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:02,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:02,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:02,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:02,693 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:02,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:02,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:02,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916314812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:02,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:02,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:34:02,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163563720] [2022-01-18 15:34:02,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:34:02,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:02,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:34:02,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:02,731 INFO L87 Difference]: Start difference. First operand 137 states and 312 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:02,942 INFO L93 Difference]: Finished difference Result 162 states and 346 transitions. [2022-01-18 15:34:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:34:02,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:02,942 INFO L225 Difference]: With dead ends: 162 [2022-01-18 15:34:02,942 INFO L226 Difference]: Without dead ends: 150 [2022-01-18 15:34:02,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:02,942 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:02,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 105 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 234 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-01-18 15:34:02,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-01-18 15:34:02,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 135. [2022-01-18 15:34:02,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.2761194029850746) internal successors, (305), 134 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 305 transitions. [2022-01-18 15:34:02,944 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 305 transitions. Word has length 17 [2022-01-18 15:34:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:02,944 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 305 transitions. [2022-01-18 15:34:02,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 305 transitions. [2022-01-18 15:34:02,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:02,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:02,944 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:02,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-01-18 15:34:03,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:03,151 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:03,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:03,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1966851546, now seen corresponding path program 231 times [2022-01-18 15:34:03,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:03,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179951153] [2022-01-18 15:34:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:03,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:03,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:03,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179951153] [2022-01-18 15:34:03,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179951153] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:03,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378478499] [2022-01-18 15:34:03,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:03,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:03,257 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:03,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-01-18 15:34:03,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:03,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:03,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:03,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:03,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:03,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:03,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:03,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:03,536 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:03,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:03,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:03,564 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:03,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378478499] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:03,564 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:03,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:34:03,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376064272] [2022-01-18 15:34:03,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:03,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:34:03,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:03,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:34:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:03,565 INFO L87 Difference]: Start difference. First operand 135 states and 305 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:03,718 INFO L93 Difference]: Finished difference Result 152 states and 342 transitions. [2022-01-18 15:34:03,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:34:03,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:03,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:03,719 INFO L225 Difference]: With dead ends: 152 [2022-01-18 15:34:03,719 INFO L226 Difference]: Without dead ends: 152 [2022-01-18 15:34:03,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:03,719 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:03,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 190 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-01-18 15:34:03,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-18 15:34:03,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 136. [2022-01-18 15:34:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.2814814814814817) internal successors, (308), 135 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 308 transitions. [2022-01-18 15:34:03,721 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 308 transitions. Word has length 17 [2022-01-18 15:34:03,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:03,721 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 308 transitions. [2022-01-18 15:34:03,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:03,721 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 308 transitions. [2022-01-18 15:34:03,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:03,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:03,721 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:03,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-01-18 15:34:03,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:03,935 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:03,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1741200148, now seen corresponding path program 232 times [2022-01-18 15:34:03,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:03,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785487994] [2022-01-18 15:34:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:03,936 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:04,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:04,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785487994] [2022-01-18 15:34:04,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785487994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:04,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868948794] [2022-01-18 15:34:04,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:04,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:04,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:04,038 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:04,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-01-18 15:34:04,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:04,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:04,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:04,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:04,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:04,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:04,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:04,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:04,327 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:04,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:04,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:04,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868948794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:04,366 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:04,366 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-01-18 15:34:04,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560620746] [2022-01-18 15:34:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:04,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:34:04,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:34:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:04,366 INFO L87 Difference]: Start difference. First operand 136 states and 308 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:04,597 INFO L93 Difference]: Finished difference Result 168 states and 366 transitions. [2022-01-18 15:34:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:34:04,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:04,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:04,597 INFO L225 Difference]: With dead ends: 168 [2022-01-18 15:34:04,597 INFO L226 Difference]: Without dead ends: 168 [2022-01-18 15:34:04,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:04,598 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:04,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 130 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 280 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-01-18 15:34:04,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-18 15:34:04,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 136. [2022-01-18 15:34:04,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.2814814814814817) internal successors, (308), 135 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:04,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 308 transitions. [2022-01-18 15:34:04,599 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 308 transitions. Word has length 17 [2022-01-18 15:34:04,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:04,599 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 308 transitions. [2022-01-18 15:34:04,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:04,599 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 308 transitions. [2022-01-18 15:34:04,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:04,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:04,600 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:04,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:04,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:04,800 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:04,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:04,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1322170598, now seen corresponding path program 233 times [2022-01-18 15:34:04,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:04,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563669663] [2022-01-18 15:34:04,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:04,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:04,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:04,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563669663] [2022-01-18 15:34:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563669663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:04,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868574342] [2022-01-18 15:34:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:04,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:04,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:04,917 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:04,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-01-18 15:34:04,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:04,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:05,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:05,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:34:05,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:05,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:34:05,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:05,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:05,269 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:05,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:05,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:05,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868574342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:05,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:05,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2022-01-18 15:34:05,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940573057] [2022-01-18 15:34:05,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:05,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:34:05,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:34:05,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:34:05,307 INFO L87 Difference]: Start difference. First operand 136 states and 308 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:05,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:05,418 INFO L93 Difference]: Finished difference Result 153 states and 332 transitions. [2022-01-18 15:34:05,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:34:05,418 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:05,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:05,418 INFO L225 Difference]: With dead ends: 153 [2022-01-18 15:34:05,419 INFO L226 Difference]: Without dead ends: 141 [2022-01-18 15:34:05,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:05,419 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:05,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 87 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 160 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-01-18 15:34:05,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-18 15:34:05,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-01-18 15:34:05,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.2666666666666666) internal successors, (306), 135 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:05,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 306 transitions. [2022-01-18 15:34:05,420 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 306 transitions. Word has length 17 [2022-01-18 15:34:05,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:05,420 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 306 transitions. [2022-01-18 15:34:05,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:05,420 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 306 transitions. [2022-01-18 15:34:05,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:05,421 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:05,421 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:05,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:05,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:05,622 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:05,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:05,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1315423218, now seen corresponding path program 234 times [2022-01-18 15:34:05,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:05,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410223026] [2022-01-18 15:34:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:05,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:05,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410223026] [2022-01-18 15:34:05,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410223026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:05,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712391754] [2022-01-18 15:34:05,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:05,727 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:05,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:05,728 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:05,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-01-18 15:34:05,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:05,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:05,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:05,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:05,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:05,963 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:05,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:05,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:05,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712391754] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:05,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:05,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:05,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37771107] [2022-01-18 15:34:05,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:05,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:05,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:05,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:05,993 INFO L87 Difference]: Start difference. First operand 136 states and 306 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:06,145 INFO L93 Difference]: Finished difference Result 159 states and 352 transitions. [2022-01-18 15:34:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:34:06,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:06,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:06,146 INFO L225 Difference]: With dead ends: 159 [2022-01-18 15:34:06,146 INFO L226 Difference]: Without dead ends: 159 [2022-01-18 15:34:06,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:34:06,146 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:06,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 86 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:34:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-18 15:34:06,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 136. [2022-01-18 15:34:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.2666666666666666) internal successors, (306), 135 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 306 transitions. [2022-01-18 15:34:06,147 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 306 transitions. Word has length 17 [2022-01-18 15:34:06,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:06,147 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 306 transitions. [2022-01-18 15:34:06,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 306 transitions. [2022-01-18 15:34:06,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:06,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:06,148 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:06,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-01-18 15:34:06,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-01-18 15:34:06,358 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1954906156, now seen corresponding path program 235 times [2022-01-18 15:34:06,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337840749] [2022-01-18 15:34:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:06,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:06,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:06,461 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337840749] [2022-01-18 15:34:06,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337840749] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:06,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437248909] [2022-01-18 15:34:06,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:06,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:06,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:06,462 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:06,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-01-18 15:34:06,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:06,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:06,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:06,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:06,701 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:06,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:06,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:06,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437248909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:06,727 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:06,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:06,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632361719] [2022-01-18 15:34:06,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:06,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:06,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:06,728 INFO L87 Difference]: Start difference. First operand 136 states and 306 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:06,945 INFO L93 Difference]: Finished difference Result 242 states and 502 transitions. [2022-01-18 15:34:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:34:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:06,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:06,947 INFO L225 Difference]: With dead ends: 242 [2022-01-18 15:34:06,947 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 15:34:06,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:06,947 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:06,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 210 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 475 Invalid, 0 Unknown, 19 Unchecked, 0.2s Time] [2022-01-18 15:34:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 15:34:06,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 138. [2022-01-18 15:34:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2846715328467155) internal successors, (313), 137 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 313 transitions. [2022-01-18 15:34:06,949 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 313 transitions. Word has length 17 [2022-01-18 15:34:06,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:06,950 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 313 transitions. [2022-01-18 15:34:06,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:06,950 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 313 transitions. [2022-01-18 15:34:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:06,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:06,951 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:06,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-01-18 15:34:07,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable255,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:07,155 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:07,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:07,155 INFO L85 PathProgramCache]: Analyzing trace with hash 393104738, now seen corresponding path program 236 times [2022-01-18 15:34:07,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:07,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975772147] [2022-01-18 15:34:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:07,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:07,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975772147] [2022-01-18 15:34:07,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975772147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:07,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066715462] [2022-01-18 15:34:07,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:07,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:07,253 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:07,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-01-18 15:34:07,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:07,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:07,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:07,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:07,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:34:07,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:34:07,425 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:07,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:07,496 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:07,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:07,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:07,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066715462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:07,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:07,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:07,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405139885] [2022-01-18 15:34:07,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:07,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:07,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:07,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:07,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:07,529 INFO L87 Difference]: Start difference. First operand 138 states and 313 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:07,788 INFO L93 Difference]: Finished difference Result 212 states and 434 transitions. [2022-01-18 15:34:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:34:07,788 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:07,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:07,788 INFO L225 Difference]: With dead ends: 212 [2022-01-18 15:34:07,788 INFO L226 Difference]: Without dead ends: 206 [2022-01-18 15:34:07,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:07,789 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 47 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:07,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 253 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-18 15:34:07,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-18 15:34:07,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 142. [2022-01-18 15:34:07,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.2624113475177303) internal successors, (319), 141 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:07,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 319 transitions. [2022-01-18 15:34:07,790 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 319 transitions. Word has length 17 [2022-01-18 15:34:07,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:07,790 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 319 transitions. [2022-01-18 15:34:07,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:07,790 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 319 transitions. [2022-01-18 15:34:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:07,791 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:07,791 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:07,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Ended with exit code 0 [2022-01-18 15:34:07,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-01-18 15:34:07,991 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash 546565956, now seen corresponding path program 237 times [2022-01-18 15:34:07,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:07,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556594333] [2022-01-18 15:34:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:07,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:08,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:08,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556594333] [2022-01-18 15:34:08,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556594333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:08,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121304409] [2022-01-18 15:34:08,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:08,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:08,088 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:08,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-01-18 15:34:08,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:08,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:08,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:34:08,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:34:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:08,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:08,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:08,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:08,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:08,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121304409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:08,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:08,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:08,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340245534] [2022-01-18 15:34:08,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:08,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:08,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:08,394 INFO L87 Difference]: Start difference. First operand 142 states and 319 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:08,610 INFO L93 Difference]: Finished difference Result 201 states and 419 transitions. [2022-01-18 15:34:08,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:34:08,610 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:08,611 INFO L225 Difference]: With dead ends: 201 [2022-01-18 15:34:08,611 INFO L226 Difference]: Without dead ends: 196 [2022-01-18 15:34:08,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:34:08,611 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 39 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:08,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 399 Invalid, 0 Unknown, 4 Unchecked, 0.1s Time] [2022-01-18 15:34:08,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-18 15:34:08,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 138. [2022-01-18 15:34:08,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.2773722627737225) internal successors, (312), 137 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:08,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 312 transitions. [2022-01-18 15:34:08,613 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 312 transitions. Word has length 17 [2022-01-18 15:34:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:08,613 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 312 transitions. [2022-01-18 15:34:08,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:08,613 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 312 transitions. [2022-01-18 15:34:08,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:08,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:08,613 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:08,628 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-01-18 15:34:08,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-01-18 15:34:08,813 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:08,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:08,814 INFO L85 PathProgramCache]: Analyzing trace with hash -143625508, now seen corresponding path program 238 times [2022-01-18 15:34:08,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:08,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856414734] [2022-01-18 15:34:08,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:08,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:08,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:08,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:08,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856414734] [2022-01-18 15:34:08,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856414734] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:08,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824393817] [2022-01-18 15:34:08,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:08,901 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:08,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:08,901 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:08,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-01-18 15:34:08,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:08,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:08,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:08,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:08,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:08,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:09,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:09,126 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:09,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:09,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:09,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824393817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:09,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:09,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:09,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717520589] [2022-01-18 15:34:09,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:09,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:09,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:09,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:09,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:09,155 INFO L87 Difference]: Start difference. First operand 138 states and 312 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:09,423 INFO L93 Difference]: Finished difference Result 293 states and 589 transitions. [2022-01-18 15:34:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:34:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:09,424 INFO L225 Difference]: With dead ends: 293 [2022-01-18 15:34:09,424 INFO L226 Difference]: Without dead ends: 293 [2022-01-18 15:34:09,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:34:09,424 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 73 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:09,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 244 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 525 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-01-18 15:34:09,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-18 15:34:09,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 139. [2022-01-18 15:34:09,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.289855072463768) internal successors, (316), 138 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:09,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 316 transitions. [2022-01-18 15:34:09,426 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 316 transitions. Word has length 17 [2022-01-18 15:34:09,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:09,426 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 316 transitions. [2022-01-18 15:34:09,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:09,426 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 316 transitions. [2022-01-18 15:34:09,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:09,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:09,426 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:09,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-01-18 15:34:09,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:09,626 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:09,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:09,627 INFO L85 PathProgramCache]: Analyzing trace with hash 775825126, now seen corresponding path program 239 times [2022-01-18 15:34:09,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:09,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668016070] [2022-01-18 15:34:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:09,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668016070] [2022-01-18 15:34:09,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668016070] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:09,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86324087] [2022-01-18 15:34:09,709 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:09,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:09,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:09,710 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:09,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-01-18 15:34:09,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:09,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:09,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:09,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:09,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:09,932 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:09,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:09,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:09,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86324087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:09,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:09,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:09,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81777965] [2022-01-18 15:34:09,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:09,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:09,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:09,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:09,963 INFO L87 Difference]: Start difference. First operand 139 states and 316 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:10,317 INFO L93 Difference]: Finished difference Result 259 states and 521 transitions. [2022-01-18 15:34:10,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:34:10,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:10,317 INFO L225 Difference]: With dead ends: 259 [2022-01-18 15:34:10,317 INFO L226 Difference]: Without dead ends: 253 [2022-01-18 15:34:10,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:34:10,318 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 83 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:10,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 172 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 374 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-01-18 15:34:10,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-18 15:34:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 139. [2022-01-18 15:34:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.282608695652174) internal successors, (315), 138 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 315 transitions. [2022-01-18 15:34:10,320 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 315 transitions. Word has length 17 [2022-01-18 15:34:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 315 transitions. [2022-01-18 15:34:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 315 transitions. [2022-01-18 15:34:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:10,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:10,320 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:10,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-01-18 15:34:10,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:10,520 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:10,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:10,520 INFO L85 PathProgramCache]: Analyzing trace with hash -730541110, now seen corresponding path program 240 times [2022-01-18 15:34:10,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474935555] [2022-01-18 15:34:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:10,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:10,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:10,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:10,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:10,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474935555] [2022-01-18 15:34:10,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474935555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:10,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111247587] [2022-01-18 15:34:10,605 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:10,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:10,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:10,606 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:10,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-01-18 15:34:10,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:10,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:10,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:10,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:10,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:10,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:10,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:10,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:10,826 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:10,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:10,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:10,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:10,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111247587] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:10,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:10,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:10,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404584586] [2022-01-18 15:34:10,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:10,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:10,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:10,854 INFO L87 Difference]: Start difference. First operand 139 states and 315 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:11,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:11,220 INFO L93 Difference]: Finished difference Result 270 states and 538 transitions. [2022-01-18 15:34:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:34:11,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:11,221 INFO L225 Difference]: With dead ends: 270 [2022-01-18 15:34:11,221 INFO L226 Difference]: Without dead ends: 266 [2022-01-18 15:34:11,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:34:11,221 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:11,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 187 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 500 Invalid, 0 Unknown, 2 Unchecked, 0.2s Time] [2022-01-18 15:34:11,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-18 15:34:11,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 139. [2022-01-18 15:34:11,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.2753623188405796) internal successors, (314), 138 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:11,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 314 transitions. [2022-01-18 15:34:11,223 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 314 transitions. Word has length 17 [2022-01-18 15:34:11,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:11,223 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 314 transitions. [2022-01-18 15:34:11,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:11,223 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 314 transitions. [2022-01-18 15:34:11,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:11,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:11,223 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:11,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:11,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:11,424 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1896549602, now seen corresponding path program 241 times [2022-01-18 15:34:11,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:11,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401189235] [2022-01-18 15:34:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:11,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:11,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401189235] [2022-01-18 15:34:11,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401189235] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:11,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787478297] [2022-01-18 15:34:11,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:11,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:11,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:11,509 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:11,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-01-18 15:34:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:11,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:11,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:11,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:11,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:11,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:11,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:11,711 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:11,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:11,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:11,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787478297] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:11,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:11,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:11,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002420031] [2022-01-18 15:34:11,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:11,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:11,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:11,743 INFO L87 Difference]: Start difference. First operand 139 states and 314 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:11,999 INFO L93 Difference]: Finished difference Result 227 states and 474 transitions. [2022-01-18 15:34:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:34:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:11,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:11,999 INFO L225 Difference]: With dead ends: 227 [2022-01-18 15:34:11,999 INFO L226 Difference]: Without dead ends: 227 [2022-01-18 15:34:11,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:12,000 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:12,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 136 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 359 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-01-18 15:34:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-18 15:34:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 137. [2022-01-18 15:34:12,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.2794117647058822) internal successors, (310), 136 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:12,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 310 transitions. [2022-01-18 15:34:12,001 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 310 transitions. Word has length 17 [2022-01-18 15:34:12,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:12,001 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 310 transitions. [2022-01-18 15:34:12,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:12,001 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 310 transitions. [2022-01-18 15:34:12,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:12,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:12,002 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:12,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-01-18 15:34:12,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:12,203 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:12,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:12,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1156318040, now seen corresponding path program 242 times [2022-01-18 15:34:12,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:12,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167774058] [2022-01-18 15:34:12,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:12,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:12,294 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:12,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167774058] [2022-01-18 15:34:12,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167774058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:12,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438490968] [2022-01-18 15:34:12,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:12,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:12,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:12,295 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:12,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-01-18 15:34:12,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:12,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:12,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:12,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:12,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:12,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:12,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:12,535 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:12,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:12,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:12,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438490968] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:12,577 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:12,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:12,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197963162] [2022-01-18 15:34:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:12,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:12,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:12,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:12,578 INFO L87 Difference]: Start difference. First operand 137 states and 310 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:12,848 INFO L93 Difference]: Finished difference Result 228 states and 466 transitions. [2022-01-18 15:34:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:34:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:12,848 INFO L225 Difference]: With dead ends: 228 [2022-01-18 15:34:12,848 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 15:34:12,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:12,848 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 98 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:12,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 115 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 340 Invalid, 0 Unknown, 12 Unchecked, 0.1s Time] [2022-01-18 15:34:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 15:34:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 134. [2022-01-18 15:34:12,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2481203007518795) internal successors, (299), 133 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:12,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 299 transitions. [2022-01-18 15:34:12,850 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 299 transitions. Word has length 17 [2022-01-18 15:34:12,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:12,850 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 299 transitions. [2022-01-18 15:34:12,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:12,850 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 299 transitions. [2022-01-18 15:34:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:12,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:12,850 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:12,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-01-18 15:34:13,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:13,063 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:13,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash -236867406, now seen corresponding path program 243 times [2022-01-18 15:34:13,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:13,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568445304] [2022-01-18 15:34:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:13,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:13,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:13,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568445304] [2022-01-18 15:34:13,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568445304] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855677683] [2022-01-18 15:34:13,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:13,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:13,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:13,151 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:13,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-01-18 15:34:13,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:13,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:13,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:13,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:13,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:13,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:13,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:13,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:13,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:13,358 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:13,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:13,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:13,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855677683] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:13,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:13,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:13,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859527111] [2022-01-18 15:34:13,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:13,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:13,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:13,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:13,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:13,386 INFO L87 Difference]: Start difference. First operand 134 states and 299 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:14,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:14,055 INFO L93 Difference]: Finished difference Result 330 states and 624 transitions. [2022-01-18 15:34:14,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-18 15:34:14,056 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:14,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:14,056 INFO L225 Difference]: With dead ends: 330 [2022-01-18 15:34:14,056 INFO L226 Difference]: Without dead ends: 324 [2022-01-18 15:34:14,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:34:14,057 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 170 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:14,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 157 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:34:14,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-18 15:34:14,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 136. [2022-01-18 15:34:14,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.259259259259259) internal successors, (305), 135 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:14,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 305 transitions. [2022-01-18 15:34:14,058 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 305 transitions. Word has length 17 [2022-01-18 15:34:14,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:14,059 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 305 transitions. [2022-01-18 15:34:14,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 305 transitions. [2022-01-18 15:34:14,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:14,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:14,059 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:14,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Ended with exit code 0 [2022-01-18 15:34:14,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:14,259 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:14,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1743233642, now seen corresponding path program 244 times [2022-01-18 15:34:14,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:14,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602055982] [2022-01-18 15:34:14,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:14,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:14,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:14,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602055982] [2022-01-18 15:34:14,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602055982] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:14,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080331584] [2022-01-18 15:34:14,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:14,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:14,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:14,353 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:14,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-01-18 15:34:14,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:14,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:14,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:14,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:14,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:14,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:14,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:14,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:14,582 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:14,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:14,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:14,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080331584] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:14,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:14,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:14,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164573576] [2022-01-18 15:34:14,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:14,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:14,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:14,618 INFO L87 Difference]: Start difference. First operand 136 states and 305 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:15,083 INFO L93 Difference]: Finished difference Result 241 states and 484 transitions. [2022-01-18 15:34:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:34:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:15,083 INFO L225 Difference]: With dead ends: 241 [2022-01-18 15:34:15,083 INFO L226 Difference]: Without dead ends: 237 [2022-01-18 15:34:15,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:34:15,084 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:15,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 135 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 331 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-01-18 15:34:15,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-18 15:34:15,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 136. [2022-01-18 15:34:15,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.251851851851852) internal successors, (304), 135 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:15,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 304 transitions. [2022-01-18 15:34:15,085 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 304 transitions. Word has length 17 [2022-01-18 15:34:15,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:15,085 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 304 transitions. [2022-01-18 15:34:15,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:15,085 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 304 transitions. [2022-01-18 15:34:15,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:15,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:15,086 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:15,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:15,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:15,286 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:15,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:15,286 INFO L85 PathProgramCache]: Analyzing trace with hash 883857070, now seen corresponding path program 245 times [2022-01-18 15:34:15,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:15,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589304117] [2022-01-18 15:34:15,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:15,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:15,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:15,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589304117] [2022-01-18 15:34:15,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589304117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:15,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664795108] [2022-01-18 15:34:15,379 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:15,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:15,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:15,380 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:15,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-01-18 15:34:15,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:34:15,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:15,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:15,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:15,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:15,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:15,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:15,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:15,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:15,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:15,596 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:15,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:15,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:15,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:15,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664795108] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:15,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:15,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:15,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428258120] [2022-01-18 15:34:15,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:15,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:15,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:15,626 INFO L87 Difference]: Start difference. First operand 136 states and 304 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:16,011 INFO L93 Difference]: Finished difference Result 223 states and 465 transitions. [2022-01-18 15:34:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:34:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:16,012 INFO L225 Difference]: With dead ends: 223 [2022-01-18 15:34:16,012 INFO L226 Difference]: Without dead ends: 223 [2022-01-18 15:34:16,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:34:16,012 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:16,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 316 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-01-18 15:34:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-18 15:34:16,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 137. [2022-01-18 15:34:16,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.25) internal successors, (306), 136 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 306 transitions. [2022-01-18 15:34:16,013 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 306 transitions. Word has length 17 [2022-01-18 15:34:16,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:16,013 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 306 transitions. [2022-01-18 15:34:16,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,014 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 306 transitions. [2022-01-18 15:34:16,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:16,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:16,014 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:16,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:16,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-01-18 15:34:16,214 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2016503852, now seen corresponding path program 246 times [2022-01-18 15:34:16,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:16,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789463994] [2022-01-18 15:34:16,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:16,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:16,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789463994] [2022-01-18 15:34:16,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789463994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:16,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857063139] [2022-01-18 15:34:16,318 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:16,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:16,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:16,319 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:16,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-01-18 15:34:16,340 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:34:16,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:16,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:16,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:16,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:16,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 51 [2022-01-18 15:34:16,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:16,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 45 [2022-01-18 15:34:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:16,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:16,603 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:16,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-01-18 15:34:16,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:16,639 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:16,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857063139] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:16,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:16,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:16,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725652397] [2022-01-18 15:34:16,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:16,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:16,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:16,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:16,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:16,640 INFO L87 Difference]: Start difference. First operand 137 states and 306 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:16,843 INFO L93 Difference]: Finished difference Result 173 states and 370 transitions. [2022-01-18 15:34:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:34:16,843 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:16,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:16,843 INFO L225 Difference]: With dead ends: 173 [2022-01-18 15:34:16,843 INFO L226 Difference]: Without dead ends: 165 [2022-01-18 15:34:16,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:16,844 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:16,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 84 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 257 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-01-18 15:34:16,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-18 15:34:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 137. [2022-01-18 15:34:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.235294117647059) internal successors, (304), 136 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 304 transitions. [2022-01-18 15:34:16,845 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 304 transitions. Word has length 17 [2022-01-18 15:34:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:16,845 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 304 transitions. [2022-01-18 15:34:16,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 304 transitions. [2022-01-18 15:34:16,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:16,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:16,846 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:16,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:17,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-01-18 15:34:17,046 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:17,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1959568226, now seen corresponding path program 247 times [2022-01-18 15:34:17,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:17,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231275408] [2022-01-18 15:34:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:17,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:17,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:17,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:17,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231275408] [2022-01-18 15:34:17,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231275408] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:17,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294921758] [2022-01-18 15:34:17,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:17,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:17,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:17,153 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:17,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-01-18 15:34:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:17,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:17,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:17,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:17,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:17,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:17,395 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:17,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-01-18 15:34:17,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-01-18 15:34:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:17,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294921758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:17,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:17,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:17,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795871475] [2022-01-18 15:34:17,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:17,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:17,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:17,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:17,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:17,428 INFO L87 Difference]: Start difference. First operand 137 states and 304 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:17,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:17,564 INFO L93 Difference]: Finished difference Result 195 states and 417 transitions. [2022-01-18 15:34:17,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:34:17,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:17,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:17,564 INFO L225 Difference]: With dead ends: 195 [2022-01-18 15:34:17,564 INFO L226 Difference]: Without dead ends: 195 [2022-01-18 15:34:17,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:34:17,564 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:17,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 271 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-01-18 15:34:17,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-18 15:34:17,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 133. [2022-01-18 15:34:17,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.212121212121212) internal successors, (292), 132 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:17,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 292 transitions. [2022-01-18 15:34:17,566 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 292 transitions. Word has length 17 [2022-01-18 15:34:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 292 transitions. [2022-01-18 15:34:17,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 292 transitions. [2022-01-18 15:34:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:17,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:17,566 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:17,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-01-18 15:34:17,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-01-18 15:34:17,767 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:17,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1809951836, now seen corresponding path program 248 times [2022-01-18 15:34:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:17,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382762504] [2022-01-18 15:34:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:17,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:17,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:17,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:17,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382762504] [2022-01-18 15:34:17,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382762504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:17,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101113235] [2022-01-18 15:34:17,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:17,862 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:17,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:17,863 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:17,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-01-18 15:34:17,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:17,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:17,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:17,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:17,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:17,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:18,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:18,152 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:18,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:18,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:18,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101113235] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:18,183 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:18,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:18,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620142767] [2022-01-18 15:34:18,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:18,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:18,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:18,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:18,184 INFO L87 Difference]: Start difference. First operand 133 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:18,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:18,285 INFO L93 Difference]: Finished difference Result 187 states and 393 transitions. [2022-01-18 15:34:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:18,285 INFO L225 Difference]: With dead ends: 187 [2022-01-18 15:34:18,285 INFO L226 Difference]: Without dead ends: 187 [2022-01-18 15:34:18,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:18,286 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:18,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 248 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-01-18 15:34:18,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-18 15:34:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 136. [2022-01-18 15:34:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.237037037037037) internal successors, (302), 135 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 302 transitions. [2022-01-18 15:34:18,287 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 302 transitions. Word has length 17 [2022-01-18 15:34:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:18,287 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 302 transitions. [2022-01-18 15:34:18,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 302 transitions. [2022-01-18 15:34:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:18,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:18,288 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:18,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:18,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-01-18 15:34:18,488 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:18,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:18,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1565564826, now seen corresponding path program 249 times [2022-01-18 15:34:18,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:18,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266807331] [2022-01-18 15:34:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:18,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:18,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266807331] [2022-01-18 15:34:18,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266807331] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:18,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315277021] [2022-01-18 15:34:18,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:18,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:18,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:18,577 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:18,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-01-18 15:34:18,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:34:18,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:18,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:18,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:18,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:18,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:18,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:18,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:18,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:18,854 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:18,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:18,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:18,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315277021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:18,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:18,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:18,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750600568] [2022-01-18 15:34:18,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:18,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:18,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:18,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:18,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:18,878 INFO L87 Difference]: Start difference. First operand 136 states and 302 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:19,082 INFO L93 Difference]: Finished difference Result 212 states and 430 transitions. [2022-01-18 15:34:19,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:34:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:19,082 INFO L225 Difference]: With dead ends: 212 [2022-01-18 15:34:19,082 INFO L226 Difference]: Without dead ends: 209 [2022-01-18 15:34:19,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:19,083 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:19,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 108 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 302 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-01-18 15:34:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-18 15:34:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 136. [2022-01-18 15:34:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.22962962962963) internal successors, (301), 135 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 301 transitions. [2022-01-18 15:34:19,084 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 301 transitions. Word has length 17 [2022-01-18 15:34:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:19,084 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 301 transitions. [2022-01-18 15:34:19,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 301 transitions. [2022-01-18 15:34:19,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:19,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:19,084 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:19,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:19,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:19,285 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1223036234, now seen corresponding path program 250 times [2022-01-18 15:34:19,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:19,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588760968] [2022-01-18 15:34:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:19,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:19,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588760968] [2022-01-18 15:34:19,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588760968] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:19,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108938117] [2022-01-18 15:34:19,383 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:19,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:19,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:19,384 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:19,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-01-18 15:34:19,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:19,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:19,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:19,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:19,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:19,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:19,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:19,665 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:19,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:19,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:19,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108938117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:19,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:19,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:19,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877728096] [2022-01-18 15:34:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:19,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:19,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:19,693 INFO L87 Difference]: Start difference. First operand 136 states and 301 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:19,883 INFO L93 Difference]: Finished difference Result 169 states and 364 transitions. [2022-01-18 15:34:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:34:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:19,883 INFO L225 Difference]: With dead ends: 169 [2022-01-18 15:34:19,883 INFO L226 Difference]: Without dead ends: 167 [2022-01-18 15:34:19,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:34:19,884 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 84 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 316 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-01-18 15:34:19,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-18 15:34:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2022-01-18 15:34:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.2222222222222223) internal successors, (300), 135 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 300 transitions. [2022-01-18 15:34:19,885 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 300 transitions. Word has length 17 [2022-01-18 15:34:19,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:19,885 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 300 transitions. [2022-01-18 15:34:19,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:19,885 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 300 transitions. [2022-01-18 15:34:19,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:19,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:19,885 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:19,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Ended with exit code 0 [2022-01-18 15:34:20,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-01-18 15:34:20,086 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:20,086 INFO L85 PathProgramCache]: Analyzing trace with hash -444840350, now seen corresponding path program 251 times [2022-01-18 15:34:20,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:20,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623178017] [2022-01-18 15:34:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:20,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:20,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:20,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623178017] [2022-01-18 15:34:20,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623178017] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:20,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512532497] [2022-01-18 15:34:20,179 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:20,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:20,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:20,180 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:20,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-01-18 15:34:20,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:34:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:20,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:20,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:20,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:20,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:20,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:20,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:20,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:20,455 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:20,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:20,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:20,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512532497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:20,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:20,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:20,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772633540] [2022-01-18 15:34:20,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:20,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:20,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:20,479 INFO L87 Difference]: Start difference. First operand 136 states and 300 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:20,652 INFO L93 Difference]: Finished difference Result 176 states and 378 transitions. [2022-01-18 15:34:20,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:20,652 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:20,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:20,653 INFO L225 Difference]: With dead ends: 176 [2022-01-18 15:34:20,653 INFO L226 Difference]: Without dead ends: 176 [2022-01-18 15:34:20,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:34:20,653 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 26 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:20,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 216 Invalid, 0 Unknown, 57 Unchecked, 0.1s Time] [2022-01-18 15:34:20,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-18 15:34:20,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 135. [2022-01-18 15:34:20,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.2238805970149254) internal successors, (298), 134 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:20,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 298 transitions. [2022-01-18 15:34:20,654 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 298 transitions. Word has length 17 [2022-01-18 15:34:20,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:20,655 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 298 transitions. [2022-01-18 15:34:20,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:20,655 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 298 transitions. [2022-01-18 15:34:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:20,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:20,655 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:20,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-01-18 15:34:20,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:20,855 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:20,856 INFO L85 PathProgramCache]: Analyzing trace with hash 687806432, now seen corresponding path program 252 times [2022-01-18 15:34:20,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:20,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111614139] [2022-01-18 15:34:20,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:20,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:20,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111614139] [2022-01-18 15:34:20,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111614139] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:20,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513758551] [2022-01-18 15:34:20,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:20,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:20,967 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:20,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-01-18 15:34:20,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 15:34:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:20,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:20,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:21,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:21,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:21,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:21,306 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:21,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:21,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513758551] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:21,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:21,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:21,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354831960] [2022-01-18 15:34:21,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:21,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:21,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:21,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:21,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:21,337 INFO L87 Difference]: Start difference. First operand 135 states and 298 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:21,466 INFO L93 Difference]: Finished difference Result 170 states and 362 transitions. [2022-01-18 15:34:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:21,466 INFO L225 Difference]: With dead ends: 170 [2022-01-18 15:34:21,466 INFO L226 Difference]: Without dead ends: 166 [2022-01-18 15:34:21,466 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:34:21,466 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 26 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:21,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 267 Invalid, 0 Unknown, 61 Unchecked, 0.1s Time] [2022-01-18 15:34:21,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-01-18 15:34:21,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 135. [2022-01-18 15:34:21,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.216417910447761) internal successors, (297), 134 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:21,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 297 transitions. [2022-01-18 15:34:21,468 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 297 transitions. Word has length 17 [2022-01-18 15:34:21,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:21,468 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 297 transitions. [2022-01-18 15:34:21,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:21,468 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 297 transitions. [2022-01-18 15:34:21,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:21,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:21,468 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:21,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-01-18 15:34:21,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:21,669 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash 630870806, now seen corresponding path program 253 times [2022-01-18 15:34:21,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:21,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267191879] [2022-01-18 15:34:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:21,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:21,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:21,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:21,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267191879] [2022-01-18 15:34:21,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267191879] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:21,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183000656] [2022-01-18 15:34:21,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:21,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:21,770 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:21,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-01-18 15:34:21,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:21,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:21,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:21,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:21,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:22,058 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:22,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:22,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:22,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183000656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:22,081 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:22,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:22,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488925360] [2022-01-18 15:34:22,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:22,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:22,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:22,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:22,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:22,082 INFO L87 Difference]: Start difference. First operand 135 states and 297 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:22,205 INFO L93 Difference]: Finished difference Result 172 states and 369 transitions. [2022-01-18 15:34:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 15:34:22,206 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:22,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:22,206 INFO L225 Difference]: With dead ends: 172 [2022-01-18 15:34:22,206 INFO L226 Difference]: Without dead ends: 172 [2022-01-18 15:34:22,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:34:22,206 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:22,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 109 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 287 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-01-18 15:34:22,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-18 15:34:22,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2022-01-18 15:34:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.218045112781955) internal successors, (295), 133 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 295 transitions. [2022-01-18 15:34:22,208 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 295 transitions. Word has length 17 [2022-01-18 15:34:22,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:22,208 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 295 transitions. [2022-01-18 15:34:22,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,208 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 295 transitions. [2022-01-18 15:34:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:22,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:22,208 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:22,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:22,411 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1275551754, now seen corresponding path program 254 times [2022-01-18 15:34:22,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909581808] [2022-01-18 15:34:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:22,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:22,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:22,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909581808] [2022-01-18 15:34:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909581808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:22,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647323377] [2022-01-18 15:34:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:22,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:22,516 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:22,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-01-18 15:34:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:22,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:22,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:22,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:22,817 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:22,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 31 [2022-01-18 15:34:22,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:22,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:22,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647323377] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:22,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:22,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:22,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617056182] [2022-01-18 15:34:22,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:22,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:22,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:22,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:22,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:22,852 INFO L87 Difference]: Start difference. First operand 134 states and 295 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:22,981 INFO L93 Difference]: Finished difference Result 167 states and 356 transitions. [2022-01-18 15:34:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:22,981 INFO L225 Difference]: With dead ends: 167 [2022-01-18 15:34:22,981 INFO L226 Difference]: Without dead ends: 161 [2022-01-18 15:34:22,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:34:22,981 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:22,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 92 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 39 Unchecked, 0.1s Time] [2022-01-18 15:34:22,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-18 15:34:22,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 134. [2022-01-18 15:34:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.210526315789474) internal successors, (294), 133 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 294 transitions. [2022-01-18 15:34:22,983 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 294 transitions. Word has length 17 [2022-01-18 15:34:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:22,983 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 294 transitions. [2022-01-18 15:34:22,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 294 transitions. [2022-01-18 15:34:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:22,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:22,983 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:22,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:23,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:23,184 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:23,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:23,184 INFO L85 PathProgramCache]: Analyzing trace with hash -381821726, now seen corresponding path program 255 times [2022-01-18 15:34:23,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:23,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262118085] [2022-01-18 15:34:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:23,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:23,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:23,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:23,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:23,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262118085] [2022-01-18 15:34:23,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262118085] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:23,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301838437] [2022-01-18 15:34:23,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:23,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:23,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:23,297 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:23,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-01-18 15:34:23,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:23,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:23,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:23,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:23,562 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:23,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:34:23,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:34:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:23,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301838437] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:23,586 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:23,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:23,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610611613] [2022-01-18 15:34:23,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:23,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:23,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:23,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:23,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:23,586 INFO L87 Difference]: Start difference. First operand 134 states and 294 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:23,655 INFO L93 Difference]: Finished difference Result 170 states and 366 transitions. [2022-01-18 15:34:23,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:23,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:23,656 INFO L225 Difference]: With dead ends: 170 [2022-01-18 15:34:23,656 INFO L226 Difference]: Without dead ends: 170 [2022-01-18 15:34:23,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:23,656 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:23,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 76 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 190 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 15:34:23,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-18 15:34:23,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 134. [2022-01-18 15:34:23,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.210526315789474) internal successors, (294), 133 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:23,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 294 transitions. [2022-01-18 15:34:23,658 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 294 transitions. Word has length 17 [2022-01-18 15:34:23,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:23,658 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 294 transitions. [2022-01-18 15:34:23,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:23,658 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 294 transitions. [2022-01-18 15:34:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:23,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:23,658 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:23,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:23,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable275 [2022-01-18 15:34:23,858 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:23,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:23,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1569933972, now seen corresponding path program 256 times [2022-01-18 15:34:23,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:23,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607911666] [2022-01-18 15:34:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:23,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:23,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:23,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:23,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607911666] [2022-01-18 15:34:23,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607911666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441022308] [2022-01-18 15:34:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:23,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:23,946 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:23,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-01-18 15:34:23,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:23,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:23,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:23,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:24,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:24,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:24,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:24,215 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:24,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:34:24,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:24,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:24,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441022308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:24,231 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:24,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:24,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561131539] [2022-01-18 15:34:24,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:24,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:24,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:24,232 INFO L87 Difference]: Start difference. First operand 134 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:24,600 INFO L93 Difference]: Finished difference Result 243 states and 501 transitions. [2022-01-18 15:34:24,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:34:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:24,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:24,601 INFO L225 Difference]: With dead ends: 243 [2022-01-18 15:34:24,601 INFO L226 Difference]: Without dead ends: 243 [2022-01-18 15:34:24,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:24,601 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 99 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:24,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 149 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:34:24,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-18 15:34:24,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 134. [2022-01-18 15:34:24,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.210526315789474) internal successors, (294), 133 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 294 transitions. [2022-01-18 15:34:24,603 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 294 transitions. Word has length 17 [2022-01-18 15:34:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:24,603 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 294 transitions. [2022-01-18 15:34:24,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 294 transitions. [2022-01-18 15:34:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:24,603 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:24,603 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:24,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-01-18 15:34:24,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-01-18 15:34:24,804 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:24,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:24,804 INFO L85 PathProgramCache]: Analyzing trace with hash -650483338, now seen corresponding path program 257 times [2022-01-18 15:34:24,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:24,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61688719] [2022-01-18 15:34:24,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:24,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:24,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:24,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61688719] [2022-01-18 15:34:24,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61688719] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560370986] [2022-01-18 15:34:24,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:24,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:24,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:24,893 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:24,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-01-18 15:34:24,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:34:24,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:24,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:25,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:25,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:25,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:25,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:25,111 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:25,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:25,210 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:25,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:25,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:25,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:25,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560370986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:25,223 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:25,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:25,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185490260] [2022-01-18 15:34:25,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:25,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:25,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:25,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:25,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:25,224 INFO L87 Difference]: Start difference. First operand 134 states and 294 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:25,339 INFO L93 Difference]: Finished difference Result 186 states and 398 transitions. [2022-01-18 15:34:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:25,339 INFO L225 Difference]: With dead ends: 186 [2022-01-18 15:34:25,339 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 15:34:25,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:25,340 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:25,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 82 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 220 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 15:34:25,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 15:34:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 134. [2022-01-18 15:34:25,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.2030075187969924) internal successors, (293), 133 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:25,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 293 transitions. [2022-01-18 15:34:25,341 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 293 transitions. Word has length 17 [2022-01-18 15:34:25,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:25,341 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 293 transitions. [2022-01-18 15:34:25,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:25,341 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 293 transitions. [2022-01-18 15:34:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:25,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:25,342 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:25,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-01-18 15:34:25,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-01-18 15:34:25,542 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:25,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:25,542 INFO L85 PathProgramCache]: Analyzing trace with hash 2138117722, now seen corresponding path program 258 times [2022-01-18 15:34:25,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:25,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033415736] [2022-01-18 15:34:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:25,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:25,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:25,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033415736] [2022-01-18 15:34:25,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033415736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:25,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576877325] [2022-01-18 15:34:25,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:25,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:25,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:25,632 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-01-18 15:34:25,654 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:25,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:25,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:25,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:25,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:25,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:25,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:25,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:25,891 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:25,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:34:25,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:25,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576877325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:25,907 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:25,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:25,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821402102] [2022-01-18 15:34:25,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:25,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:25,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:25,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:25,907 INFO L87 Difference]: Start difference. First operand 134 states and 293 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:26,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:26,561 INFO L93 Difference]: Finished difference Result 242 states and 496 transitions. [2022-01-18 15:34:26,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:34:26,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:26,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:26,561 INFO L225 Difference]: With dead ends: 242 [2022-01-18 15:34:26,561 INFO L226 Difference]: Without dead ends: 240 [2022-01-18 15:34:26,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:34:26,561 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:26,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 169 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:34:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-18 15:34:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 134. [2022-01-18 15:34:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:26,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2022-01-18 15:34:26,563 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 17 [2022-01-18 15:34:26,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:26,563 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2022-01-18 15:34:26,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2022-01-18 15:34:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:26,563 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:26,563 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:26,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-01-18 15:34:26,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable278,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:26,764 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:26,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:26,764 INFO L85 PathProgramCache]: Analyzing trace with hash 470241138, now seen corresponding path program 259 times [2022-01-18 15:34:26,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:26,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042564602] [2022-01-18 15:34:26,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:26,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:26,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042564602] [2022-01-18 15:34:26,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042564602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:26,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716091388] [2022-01-18 15:34:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:26,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:26,852 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:26,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-01-18 15:34:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:26,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:26,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:26,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:26,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:26,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:27,031 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:27,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:27,127 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:27,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:27,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:27,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:27,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716091388] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:27,142 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:27,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:27,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686529188] [2022-01-18 15:34:27,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:27,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:27,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:27,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:27,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:27,143 INFO L87 Difference]: Start difference. First operand 134 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:27,273 INFO L93 Difference]: Finished difference Result 185 states and 400 transitions. [2022-01-18 15:34:27,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:34:27,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:27,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:27,273 INFO L225 Difference]: With dead ends: 185 [2022-01-18 15:34:27,273 INFO L226 Difference]: Without dead ends: 185 [2022-01-18 15:34:27,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:27,273 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:27,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 74 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-01-18 15:34:27,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-18 15:34:27,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 133. [2022-01-18 15:34:27,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.196969696969697) internal successors, (290), 132 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 290 transitions. [2022-01-18 15:34:27,275 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 290 transitions. Word has length 17 [2022-01-18 15:34:27,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:27,275 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 290 transitions. [2022-01-18 15:34:27,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,275 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 290 transitions. [2022-01-18 15:34:27,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:27,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:27,275 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:27,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:27,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-01-18 15:34:27,476 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash 454780342, now seen corresponding path program 260 times [2022-01-18 15:34:27,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356814650] [2022-01-18 15:34:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:27,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:27,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356814650] [2022-01-18 15:34:27,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356814650] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:27,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899273750] [2022-01-18 15:34:27,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:27,563 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:27,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:27,564 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:27,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-01-18 15:34:27,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:27,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:27,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:27,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:27,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:27,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:34:27,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:27,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:34:27,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:27,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:27,843 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:27,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:27,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:27,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899273750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:27,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:27,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153658278] [2022-01-18 15:34:27,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:27,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:27,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:27,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:27,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:27,858 INFO L87 Difference]: Start difference. First operand 133 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:27,987 INFO L93 Difference]: Finished difference Result 205 states and 441 transitions. [2022-01-18 15:34:27,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:34:27,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:27,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:27,988 INFO L225 Difference]: With dead ends: 205 [2022-01-18 15:34:27,988 INFO L226 Difference]: Without dead ends: 205 [2022-01-18 15:34:27,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:34:27,988 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:27,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 175 Invalid, 0 Unknown, 126 Unchecked, 0.1s Time] [2022-01-18 15:34:27,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-18 15:34:27,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 133. [2022-01-18 15:34:27,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.196969696969697) internal successors, (290), 132 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 290 transitions. [2022-01-18 15:34:27,989 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 290 transitions. Word has length 17 [2022-01-18 15:34:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:27,990 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 290 transitions. [2022-01-18 15:34:27,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:27,990 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 290 transitions. [2022-01-18 15:34:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:27,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:27,990 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:28,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:28,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-01-18 15:34:28,190 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:28,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:28,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1602887920, now seen corresponding path program 261 times [2022-01-18 15:34:28,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:28,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882542985] [2022-01-18 15:34:28,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:28,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:28,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882542985] [2022-01-18 15:34:28,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882542985] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:28,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953937818] [2022-01-18 15:34:28,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:28,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:28,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:28,292 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:28,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-01-18 15:34:28,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 15:34:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:28,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:28,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:28,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:28,503 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:28,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:28,607 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:28,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:34:28,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:28,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953937818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:28,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:28,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:28,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971706206] [2022-01-18 15:34:28,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:28,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:28,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:28,625 INFO L87 Difference]: Start difference. First operand 133 states and 290 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:28,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:28,940 INFO L93 Difference]: Finished difference Result 219 states and 455 transitions. [2022-01-18 15:34:28,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:34:28,941 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:28,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:28,941 INFO L225 Difference]: With dead ends: 219 [2022-01-18 15:34:28,941 INFO L226 Difference]: Without dead ends: 215 [2022-01-18 15:34:28,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:28,941 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:28,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 110 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:34:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-18 15:34:28,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 133. [2022-01-18 15:34:28,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 132 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 289 transitions. [2022-01-18 15:34:28,943 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 289 transitions. Word has length 17 [2022-01-18 15:34:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:28,943 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 289 transitions. [2022-01-18 15:34:28,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 289 transitions. [2022-01-18 15:34:28,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:28,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:28,943 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:28,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-01-18 15:34:29,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:29,144 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1545952294, now seen corresponding path program 262 times [2022-01-18 15:34:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48723854] [2022-01-18 15:34:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:29,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48723854] [2022-01-18 15:34:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48723854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062540986] [2022-01-18 15:34:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:29,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:29,250 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-01-18 15:34:29,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:29,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:29,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:29,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:29,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:29,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:29,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:29,545 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:29,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:29,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:29,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062540986] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:29,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:29,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:29,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342777829] [2022-01-18 15:34:29,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:29,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:29,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:29,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:29,560 INFO L87 Difference]: Start difference. First operand 133 states and 289 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:29,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:29,631 INFO L93 Difference]: Finished difference Result 184 states and 397 transitions. [2022-01-18 15:34:29,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:29,631 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:29,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:29,632 INFO L225 Difference]: With dead ends: 184 [2022-01-18 15:34:29,632 INFO L226 Difference]: Without dead ends: 184 [2022-01-18 15:34:29,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:29,632 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:29,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 74 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-01-18 15:34:29,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-18 15:34:29,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 134. [2022-01-18 15:34:29,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:29,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2022-01-18 15:34:29,633 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 17 [2022-01-18 15:34:29,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:29,633 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2022-01-18 15:34:29,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:29,633 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2022-01-18 15:34:29,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:29,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:29,634 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:29,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-01-18 15:34:29,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-01-18 15:34:29,834 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:29,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1530491498, now seen corresponding path program 263 times [2022-01-18 15:34:29,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341968775] [2022-01-18 15:34:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:29,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:29,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341968775] [2022-01-18 15:34:29,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341968775] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100134588] [2022-01-18 15:34:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:29,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:29,933 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:29,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-01-18 15:34:29,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:29,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:29,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:29,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:30,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:30,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:30,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:30,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:30,258 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:30,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:30,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:30,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100134588] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:30,275 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:30,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:30,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297533722] [2022-01-18 15:34:30,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:30,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:30,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:30,276 INFO L87 Difference]: Start difference. First operand 134 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:30,359 INFO L93 Difference]: Finished difference Result 202 states and 435 transitions. [2022-01-18 15:34:30,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:30,360 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:30,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:30,360 INFO L225 Difference]: With dead ends: 202 [2022-01-18 15:34:30,360 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 15:34:30,360 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:30,360 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:30,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 77 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-01-18 15:34:30,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 15:34:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2022-01-18 15:34:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2022-01-18 15:34:30,362 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 17 [2022-01-18 15:34:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:30,362 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2022-01-18 15:34:30,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2022-01-18 15:34:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:30,362 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:30,362 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:30,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-01-18 15:34:30,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:30,563 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:30,563 INFO L85 PathProgramCache]: Analyzing trace with hash 959036692, now seen corresponding path program 264 times [2022-01-18 15:34:30,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:30,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410564161] [2022-01-18 15:34:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:30,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:30,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:30,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410564161] [2022-01-18 15:34:30,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410564161] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:30,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761928730] [2022-01-18 15:34:30,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:30,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:30,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:30,671 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:30,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-01-18 15:34:30,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:30,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:30,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:30,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:30,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:30,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:31,041 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:31,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:31,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:31,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761928730] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:31,059 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:31,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-01-18 15:34:31,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392097389] [2022-01-18 15:34:31,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:34:31,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:34:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:31,060 INFO L87 Difference]: Start difference. First operand 134 states and 292 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:31,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:31,141 INFO L93 Difference]: Finished difference Result 204 states and 438 transitions. [2022-01-18 15:34:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:31,141 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:31,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:31,142 INFO L225 Difference]: With dead ends: 204 [2022-01-18 15:34:31,142 INFO L226 Difference]: Without dead ends: 204 [2022-01-18 15:34:31,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:34:31,142 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:31,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 84 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 184 Invalid, 0 Unknown, 74 Unchecked, 0.1s Time] [2022-01-18 15:34:31,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-18 15:34:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 132. [2022-01-18 15:34:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2022-01-18 15:34:31,144 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 17 [2022-01-18 15:34:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:31,144 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2022-01-18 15:34:31,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2022-01-18 15:34:31,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:31,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:31,145 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:31,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-01-18 15:34:31,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:31,345 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:31,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:31,346 INFO L85 PathProgramCache]: Analyzing trace with hash -2104334054, now seen corresponding path program 265 times [2022-01-18 15:34:31,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892750515] [2022-01-18 15:34:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:31,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:31,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892750515] [2022-01-18 15:34:31,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892750515] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:31,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894623673] [2022-01-18 15:34:31,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:31,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:31,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:31,481 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:31,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-01-18 15:34:31,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:31,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:31,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:31,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:34:31,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:34:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:31,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:31,910 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:31,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:34:31,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894623673] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:31,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:31,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:31,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563869562] [2022-01-18 15:34:31,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:31,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:31,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:31,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:31,935 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:32,149 INFO L93 Difference]: Finished difference Result 220 states and 458 transitions. [2022-01-18 15:34:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:34:32,150 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:32,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:32,150 INFO L225 Difference]: With dead ends: 220 [2022-01-18 15:34:32,150 INFO L226 Difference]: Without dead ends: 214 [2022-01-18 15:34:32,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:32,150 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:32,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 125 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 244 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-01-18 15:34:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-01-18 15:34:32,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 132. [2022-01-18 15:34:32,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.183206106870229) internal successors, (286), 131 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 286 transitions. [2022-01-18 15:34:32,153 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 286 transitions. Word has length 17 [2022-01-18 15:34:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:32,153 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 286 transitions. [2022-01-18 15:34:32,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 286 transitions. [2022-01-18 15:34:32,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:32,153 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:32,153 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:32,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:32,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable285 [2022-01-18 15:34:32,354 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:32,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:32,354 INFO L85 PathProgramCache]: Analyzing trace with hash 533259762, now seen corresponding path program 266 times [2022-01-18 15:34:32,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:32,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377863996] [2022-01-18 15:34:32,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:32,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:32,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:32,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:32,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:32,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377863996] [2022-01-18 15:34:32,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377863996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:32,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557936113] [2022-01-18 15:34:32,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:32,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:32,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:32,472 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:32,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-01-18 15:34:32,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:32,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:32,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:32,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:32,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:32,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:32,825 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:32,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:32,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:32,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557936113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:32,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:32,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:32,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568701777] [2022-01-18 15:34:32,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:32,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:32,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:32,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:32,845 INFO L87 Difference]: Start difference. First operand 132 states and 286 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:32,948 INFO L93 Difference]: Finished difference Result 184 states and 397 transitions. [2022-01-18 15:34:32,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:32,949 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:32,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:32,949 INFO L225 Difference]: With dead ends: 184 [2022-01-18 15:34:32,949 INFO L226 Difference]: Without dead ends: 184 [2022-01-18 15:34:32,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:32,950 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:32,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-01-18 15:34:32,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-18 15:34:32,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 134. [2022-01-18 15:34:32,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.1954887218045114) internal successors, (292), 133 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 292 transitions. [2022-01-18 15:34:32,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 292 transitions. Word has length 17 [2022-01-18 15:34:32,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:32,952 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 292 transitions. [2022-01-18 15:34:32,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:32,952 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 292 transitions. [2022-01-18 15:34:32,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:32,952 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:32,952 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:32,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-01-18 15:34:33,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable286 [2022-01-18 15:34:33,153 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:33,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:33,153 INFO L85 PathProgramCache]: Analyzing trace with hash 517798966, now seen corresponding path program 267 times [2022-01-18 15:34:33,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:33,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149345683] [2022-01-18 15:34:33,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:33,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:33,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149345683] [2022-01-18 15:34:33,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149345683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:33,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963778106] [2022-01-18 15:34:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:33,270 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:33,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:33,271 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:33,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-01-18 15:34:33,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:33,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:33,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:33,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:33,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:33,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:33,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:33,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:33,570 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:33,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:33,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:33,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963778106] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:33,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:33,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:33,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132615644] [2022-01-18 15:34:33,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:33,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:33,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:33,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:33,584 INFO L87 Difference]: Start difference. First operand 134 states and 292 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:33,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:33,746 INFO L93 Difference]: Finished difference Result 176 states and 376 transitions. [2022-01-18 15:34:33,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-18 15:34:33,747 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:33,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:33,747 INFO L225 Difference]: With dead ends: 176 [2022-01-18 15:34:33,747 INFO L226 Difference]: Without dead ends: 176 [2022-01-18 15:34:33,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:34:33,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:33,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:34:33,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-18 15:34:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 132. [2022-01-18 15:34:33,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 131 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 287 transitions. [2022-01-18 15:34:33,749 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 287 transitions. Word has length 17 [2022-01-18 15:34:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:33,749 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 287 transitions. [2022-01-18 15:34:33,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:33,749 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 287 transitions. [2022-01-18 15:34:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:33,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:33,749 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:33,769 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-01-18 15:34:33,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable287,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:33,950 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:33,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1506997396, now seen corresponding path program 268 times [2022-01-18 15:34:33,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:33,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153608324] [2022-01-18 15:34:33,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:33,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:33,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:34,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:34,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153608324] [2022-01-18 15:34:34,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153608324] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:34,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57084680] [2022-01-18 15:34:34,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:34,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:34,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:34,058 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:34,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-01-18 15:34:34,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:34,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:34,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:34,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:34,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-01-18 15:34:34,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-01-18 15:34:34,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:34,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:34,355 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:34,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:34:34,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:34:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:34,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57084680] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:34,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:34,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-01-18 15:34:34,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144763738] [2022-01-18 15:34:34,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:34,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 15:34:34,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:34,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 15:34:34,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-01-18 15:34:34,375 INFO L87 Difference]: Start difference. First operand 132 states and 287 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:34,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:34,539 INFO L93 Difference]: Finished difference Result 226 states and 451 transitions. [2022-01-18 15:34:34,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:34:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:34,539 INFO L225 Difference]: With dead ends: 226 [2022-01-18 15:34:34,540 INFO L226 Difference]: Without dead ends: 218 [2022-01-18 15:34:34,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:34:34,540 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:34,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 201 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 285 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-01-18 15:34:34,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-18 15:34:34,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 130. [2022-01-18 15:34:34,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 2.193798449612403) internal successors, (283), 129 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:34,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 283 transitions. [2022-01-18 15:34:34,541 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 283 transitions. Word has length 17 [2022-01-18 15:34:34,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:34,541 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 283 transitions. [2022-01-18 15:34:34,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:34,541 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 283 transitions. [2022-01-18 15:34:34,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-18 15:34:34,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:34,542 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:34,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-01-18 15:34:34,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-01-18 15:34:34,742 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:34,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1238336798, now seen corresponding path program 269 times [2022-01-18 15:34:34,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:34,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230613120] [2022-01-18 15:34:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:34,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:34,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:34,835 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:34,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230613120] [2022-01-18 15:34:34,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230613120] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:34,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752379620] [2022-01-18 15:34:34,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:34,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:34,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:34,836 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:34,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-01-18 15:34:34,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:34,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:34,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-18 15:34:34,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:34,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:34:34,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:34:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:34,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:35,094 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:35,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:34:35,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:34:35,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:35,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752379620] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:35,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:35,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 13 [2022-01-18 15:34:35,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364567843] [2022-01-18 15:34:35,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:35,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 15:34:35,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 15:34:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-01-18 15:34:35,110 INFO L87 Difference]: Start difference. First operand 130 states and 283 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:35,346 INFO L93 Difference]: Finished difference Result 242 states and 514 transitions. [2022-01-18 15:34:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:34:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-01-18 15:34:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:35,347 INFO L225 Difference]: With dead ends: 242 [2022-01-18 15:34:35,347 INFO L226 Difference]: Without dead ends: 242 [2022-01-18 15:34:35,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:34:35,347 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:35,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 93 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 259 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-01-18 15:34:35,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-01-18 15:34:35,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 129. [2022-01-18 15:34:35,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.1875) internal successors, (280), 128 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:35,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 280 transitions. [2022-01-18 15:34:35,349 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 280 transitions. Word has length 17 [2022-01-18 15:34:35,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:35,349 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 280 transitions. [2022-01-18 15:34:35,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:35,349 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 280 transitions. [2022-01-18 15:34:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:35,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:35,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:35,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-01-18 15:34:35,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-01-18 15:34:35,550 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:35,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1015034815, now seen corresponding path program 270 times [2022-01-18 15:34:35,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:35,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139210767] [2022-01-18 15:34:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:35,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:35,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:35,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:35,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139210767] [2022-01-18 15:34:35,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139210767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:35,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066899419] [2022-01-18 15:34:35,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:35,890 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:35,891 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-01-18 15:34:35,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:35,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:35,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:35,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:36,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:36,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:36,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:36,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:36,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:37,306 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:37,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 15:34:37,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 15:34:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:37,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066899419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:37,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:37,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:34:37,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110518685] [2022-01-18 15:34:37,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:37,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:34:37,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:37,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:34:37,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:37,320 INFO L87 Difference]: Start difference. First operand 129 states and 280 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:38,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:38,143 INFO L93 Difference]: Finished difference Result 302 states and 629 transitions. [2022-01-18 15:34:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:38,143 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:38,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:38,144 INFO L225 Difference]: With dead ends: 302 [2022-01-18 15:34:38,144 INFO L226 Difference]: Without dead ends: 278 [2022-01-18 15:34:38,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:34:38,144 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 103 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:38,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 172 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 494 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-01-18 15:34:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-01-18 15:34:38,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 131. [2022-01-18 15:34:38,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 2.1846153846153844) internal successors, (284), 130 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:38,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 284 transitions. [2022-01-18 15:34:38,146 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 284 transitions. Word has length 18 [2022-01-18 15:34:38,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:38,146 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 284 transitions. [2022-01-18 15:34:38,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 25 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:38,146 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 284 transitions. [2022-01-18 15:34:38,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:38,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:38,146 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:38,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Ended with exit code 0 [2022-01-18 15:34:38,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:38,347 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1330514305, now seen corresponding path program 271 times [2022-01-18 15:34:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:38,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034320559] [2022-01-18 15:34:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:38,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:38,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:38,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034320559] [2022-01-18 15:34:38,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034320559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:38,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610311695] [2022-01-18 15:34:38,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:38,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:38,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:38,552 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:38,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-01-18 15:34:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:38,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:38,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:38,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:34:38,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:34:38,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:38,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:39,647 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:39,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:34:39,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:34:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610311695] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:39,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:34:39,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376255529] [2022-01-18 15:34:39,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:39,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:39,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:39,661 INFO L87 Difference]: Start difference. First operand 131 states and 284 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:40,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:40,146 INFO L93 Difference]: Finished difference Result 298 states and 625 transitions. [2022-01-18 15:34:40,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:40,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:40,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:40,146 INFO L225 Difference]: With dead ends: 298 [2022-01-18 15:34:40,146 INFO L226 Difference]: Without dead ends: 291 [2022-01-18 15:34:40,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:34:40,147 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:40,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 177 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:34:40,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-18 15:34:40,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 135. [2022-01-18 15:34:40,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 2.1791044776119404) internal successors, (292), 134 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 292 transitions. [2022-01-18 15:34:40,148 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 292 transitions. Word has length 18 [2022-01-18 15:34:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:40,149 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 292 transitions. [2022-01-18 15:34:40,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 292 transitions. [2022-01-18 15:34:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:40,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:40,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:40,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-01-18 15:34:40,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:40,349 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:40,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1943883131, now seen corresponding path program 272 times [2022-01-18 15:34:40,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:40,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39284073] [2022-01-18 15:34:40,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:40,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:40,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39284073] [2022-01-18 15:34:40,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39284073] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:40,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142929586] [2022-01-18 15:34:40,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:40,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:40,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:40,600 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:40,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-01-18 15:34:40,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:40,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:40,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:40,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:40,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 108 [2022-01-18 15:34:40,992 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 86 [2022-01-18 15:34:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:41,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:41,711 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:41,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:34:41,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:34:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:41,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142929586] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:41,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:41,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:34:41,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103911113] [2022-01-18 15:34:41,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:41,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:41,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:41,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:41,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:41,724 INFO L87 Difference]: Start difference. First operand 135 states and 292 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:42,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:42,254 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2022-01-18 15:34:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:42,255 INFO L225 Difference]: With dead ends: 302 [2022-01-18 15:34:42,255 INFO L226 Difference]: Without dead ends: 295 [2022-01-18 15:34:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:34:42,255 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 48 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 774 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:42,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 245 Invalid, 774 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:34:42,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-18 15:34:42,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 136. [2022-01-18 15:34:42,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.185185185185185) internal successors, (295), 135 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:42,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 295 transitions. [2022-01-18 15:34:42,257 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 295 transitions. Word has length 18 [2022-01-18 15:34:42,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:42,257 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 295 transitions. [2022-01-18 15:34:42,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:42,257 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 295 transitions. [2022-01-18 15:34:42,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:42,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:42,257 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:42,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:42,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-01-18 15:34:42,470 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:42,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:42,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1968363777, now seen corresponding path program 273 times [2022-01-18 15:34:42,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:42,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884787025] [2022-01-18 15:34:42,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:42,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:42,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884787025] [2022-01-18 15:34:42,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884787025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:42,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561791907] [2022-01-18 15:34:42,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:42,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:42,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:42,775 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:42,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-01-18 15:34:42,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:42,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:42,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:42,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:43,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:43,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:34:43,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:43,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:34:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:44,311 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:44,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 15:34:44,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 15:34:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:44,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561791907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:44,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:44,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:34:44,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896363164] [2022-01-18 15:34:44,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:44,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:34:44,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:44,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:34:44,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:44,326 INFO L87 Difference]: Start difference. First operand 136 states and 295 transitions. Second operand has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:44,747 INFO L93 Difference]: Finished difference Result 250 states and 530 transitions. [2022-01-18 15:34:44,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:44,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:44,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:44,748 INFO L225 Difference]: With dead ends: 250 [2022-01-18 15:34:44,748 INFO L226 Difference]: Without dead ends: 243 [2022-01-18 15:34:44,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:34:44,748 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 44 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:44,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 162 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 467 Invalid, 0 Unknown, 17 Unchecked, 0.2s Time] [2022-01-18 15:34:44,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-18 15:34:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 137. [2022-01-18 15:34:44,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1911764705882355) internal successors, (298), 136 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:44,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 298 transitions. [2022-01-18 15:34:44,750 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 298 transitions. Word has length 18 [2022-01-18 15:34:44,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:44,750 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 298 transitions. [2022-01-18 15:34:44,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 26 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:44,750 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 298 transitions. [2022-01-18 15:34:44,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:44,750 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:44,750 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:44,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-01-18 15:34:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:44,951 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash -847639301, now seen corresponding path program 274 times [2022-01-18 15:34:44,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716906166] [2022-01-18 15:34:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:44,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:44,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:45,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:45,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716906166] [2022-01-18 15:34:45,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716906166] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:45,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931380094] [2022-01-18 15:34:45,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:45,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:45,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:45,159 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:45,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-01-18 15:34:45,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:45,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:34:45,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:34:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:45,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:46,213 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:46,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 104 [2022-01-18 15:34:46,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 79 [2022-01-18 15:34:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:46,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931380094] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:46,229 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:46,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:34:46,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121876324] [2022-01-18 15:34:46,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:46,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:34:46,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:46,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:34:46,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:34:46,230 INFO L87 Difference]: Start difference. First operand 137 states and 298 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:46,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:46,687 INFO L93 Difference]: Finished difference Result 315 states and 655 transitions. [2022-01-18 15:34:46,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:46,687 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:46,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:46,688 INFO L225 Difference]: With dead ends: 315 [2022-01-18 15:34:46,688 INFO L226 Difference]: Without dead ends: 308 [2022-01-18 15:34:46,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:46,688 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:46,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 216 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:34:46,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-18 15:34:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 138. [2022-01-18 15:34:46,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:46,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2022-01-18 15:34:46,690 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2022-01-18 15:34:46,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:46,690 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2022-01-18 15:34:46,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:46,690 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2022-01-18 15:34:46,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:46,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:46,690 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:46,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:46,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:46,891 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:46,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:46,891 INFO L85 PathProgramCache]: Analyzing trace with hash -863100097, now seen corresponding path program 275 times [2022-01-18 15:34:46,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:46,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840930510] [2022-01-18 15:34:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:46,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:47,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:47,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840930510] [2022-01-18 15:34:47,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840930510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:47,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155492014] [2022-01-18 15:34:47,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:47,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:47,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:47,141 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:47,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-01-18 15:34:47,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:34:47,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:47,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:47,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:47,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:34:47,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:34:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:47,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:48,117 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:34:48,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:34:48,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:34:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:48,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155492014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:48,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:48,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:34:48,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145656527] [2022-01-18 15:34:48,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:48,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:48,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:48,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:48,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:48,131 INFO L87 Difference]: Start difference. First operand 138 states and 302 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:48,575 INFO L93 Difference]: Finished difference Result 303 states and 637 transitions. [2022-01-18 15:34:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:48,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:48,576 INFO L225 Difference]: With dead ends: 303 [2022-01-18 15:34:48,576 INFO L226 Difference]: Without dead ends: 296 [2022-01-18 15:34:48,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:34:48,576 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 67 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:48,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 185 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:34:48,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-18 15:34:48,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 138. [2022-01-18 15:34:48,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.204379562043796) internal successors, (302), 137 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:48,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 302 transitions. [2022-01-18 15:34:48,578 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 302 transitions. Word has length 18 [2022-01-18 15:34:48,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:48,578 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 302 transitions. [2022-01-18 15:34:48,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:48,578 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 302 transitions. [2022-01-18 15:34:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:48,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:48,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:48,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-01-18 15:34:48,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:48,779 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:48,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:48,779 INFO L85 PathProgramCache]: Analyzing trace with hash -424560367, now seen corresponding path program 276 times [2022-01-18 15:34:48,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:48,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734505689] [2022-01-18 15:34:48,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:48,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:48,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734505689] [2022-01-18 15:34:48,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734505689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651709636] [2022-01-18 15:34:48,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:34:48,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:48,979 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:48,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-01-18 15:34:49,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:34:49,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:49,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:49,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:49,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:49,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:49,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:49,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:50,202 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:50,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 117 [2022-01-18 15:34:50,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 84 [2022-01-18 15:34:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:50,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651709636] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:50,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:50,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:34:50,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313257592] [2022-01-18 15:34:50,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:50,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:34:50,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:50,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:34:50,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:50,223 INFO L87 Difference]: Start difference. First operand 138 states and 302 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:50,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:50,379 INFO L93 Difference]: Finished difference Result 227 states and 479 transitions. [2022-01-18 15:34:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:50,380 INFO L225 Difference]: With dead ends: 227 [2022-01-18 15:34:50,380 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 15:34:50,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:50,380 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:50,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 228 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 98 Unchecked, 0.1s Time] [2022-01-18 15:34:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 15:34:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 146. [2022-01-18 15:34:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.2) internal successors, (319), 145 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 319 transitions. [2022-01-18 15:34:50,382 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 319 transitions. Word has length 18 [2022-01-18 15:34:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:50,382 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 319 transitions. [2022-01-18 15:34:50,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 319 transitions. [2022-01-18 15:34:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:50,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:50,383 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:50,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-01-18 15:34:50,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable296 [2022-01-18 15:34:50,598 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:50,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:50,598 INFO L85 PathProgramCache]: Analyzing trace with hash -252665123, now seen corresponding path program 277 times [2022-01-18 15:34:50,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:50,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632810614] [2022-01-18 15:34:50,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:50,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:50,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632810614] [2022-01-18 15:34:50,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632810614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:50,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447146881] [2022-01-18 15:34:50,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:34:50,802 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:50,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:50,803 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:50,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-01-18 15:34:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:50,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:50,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:51,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:51,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:51,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:51,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:51,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:51,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:52,076 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:52,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:34:52,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:34:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:52,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447146881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:52,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:52,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:34:52,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104577654] [2022-01-18 15:34:52,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:52,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:34:52,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:52,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:34:52,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:52,096 INFO L87 Difference]: Start difference. First operand 146 states and 319 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:52,306 INFO L93 Difference]: Finished difference Result 227 states and 475 transitions. [2022-01-18 15:34:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:52,307 INFO L225 Difference]: With dead ends: 227 [2022-01-18 15:34:52,307 INFO L226 Difference]: Without dead ends: 224 [2022-01-18 15:34:52,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:52,307 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 29 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:52,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 217 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 465 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-01-18 15:34:52,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-18 15:34:52,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 140. [2022-01-18 15:34:52,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.20863309352518) internal successors, (307), 139 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 307 transitions. [2022-01-18 15:34:52,309 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 307 transitions. Word has length 18 [2022-01-18 15:34:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:52,309 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 307 transitions. [2022-01-18 15:34:52,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 307 transitions. [2022-01-18 15:34:52,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:52,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:52,309 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:52,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Forceful destruction successful, exit code 0 [2022-01-18 15:34:52,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:52,510 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:52,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1445130227, now seen corresponding path program 278 times [2022-01-18 15:34:52,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:52,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917602006] [2022-01-18 15:34:52,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:52,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:52,765 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:52,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917602006] [2022-01-18 15:34:52,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917602006] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:52,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319990467] [2022-01-18 15:34:52,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:34:52,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:52,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:52,766 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:52,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-01-18 15:34:52,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:34:52,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:52,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:53,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:53,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:53,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:53,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:53,993 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:53,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:34:53,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:34:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:54,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319990467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:54,012 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:54,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:34:54,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444755402] [2022-01-18 15:34:54,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:54,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:34:54,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:54,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:34:54,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:54,013 INFO L87 Difference]: Start difference. First operand 140 states and 307 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:54,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:54,217 INFO L93 Difference]: Finished difference Result 227 states and 479 transitions. [2022-01-18 15:34:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:54,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:54,217 INFO L225 Difference]: With dead ends: 227 [2022-01-18 15:34:54,217 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 15:34:54,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:54,218 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:54,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 239 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 467 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-01-18 15:34:54,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 15:34:54,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 143. [2022-01-18 15:34:54,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.211267605633803) internal successors, (314), 142 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 314 transitions. [2022-01-18 15:34:54,219 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 314 transitions. Word has length 18 [2022-01-18 15:34:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:54,219 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 314 transitions. [2022-01-18 15:34:54,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 314 transitions. [2022-01-18 15:34:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:54,220 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:54,220 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:54,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-01-18 15:34:54,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-01-18 15:34:54,420 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:54,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:54,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1291669009, now seen corresponding path program 279 times [2022-01-18 15:34:54,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:54,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263522793] [2022-01-18 15:34:54,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:54,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:54,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263522793] [2022-01-18 15:34:54,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263522793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699980540] [2022-01-18 15:34:54,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:34:54,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:54,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:54,682 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:54,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-01-18 15:34:54,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:34:54,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:54,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:54,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:55,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:55,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:55,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:55,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:55,929 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:55,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:34:55,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:34:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:55,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699980540] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:55,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:55,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:34:55,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553536136] [2022-01-18 15:34:55,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:55,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:34:55,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:34:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:55,951 INFO L87 Difference]: Start difference. First operand 143 states and 314 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:56,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:56,169 INFO L93 Difference]: Finished difference Result 225 states and 473 transitions. [2022-01-18 15:34:56,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:56,169 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:56,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:56,170 INFO L225 Difference]: With dead ends: 225 [2022-01-18 15:34:56,170 INFO L226 Difference]: Without dead ends: 222 [2022-01-18 15:34:56,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:34:56,170 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:56,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 235 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 488 Invalid, 0 Unknown, 117 Unchecked, 0.2s Time] [2022-01-18 15:34:56,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-01-18 15:34:56,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 141. [2022-01-18 15:34:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.2142857142857144) internal successors, (310), 140 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 310 transitions. [2022-01-18 15:34:56,172 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 310 transitions. Word has length 18 [2022-01-18 15:34:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:56,172 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 310 transitions. [2022-01-18 15:34:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 310 transitions. [2022-01-18 15:34:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:56,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:56,172 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:56,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-01-18 15:34:56,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-01-18 15:34:56,372 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:56,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:56,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1062409839, now seen corresponding path program 280 times [2022-01-18 15:34:56,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:56,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621128670] [2022-01-18 15:34:56,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:56,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:56,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:56,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621128670] [2022-01-18 15:34:56,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621128670] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:56,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297709442] [2022-01-18 15:34:56,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:34:56,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:56,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:56,586 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:56,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-01-18 15:34:56,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:34:56,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:56,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:56,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:57,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:57,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:34:57,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:57,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:34:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:57,814 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:57,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:34:57,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:34:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:57,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297709442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:57,834 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:57,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:34:57,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888855039] [2022-01-18 15:34:57,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:57,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:57,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:57,834 INFO L87 Difference]: Start difference. First operand 141 states and 310 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:58,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:58,021 INFO L93 Difference]: Finished difference Result 225 states and 477 transitions. [2022-01-18 15:34:58,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:58,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:58,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:58,022 INFO L225 Difference]: With dead ends: 225 [2022-01-18 15:34:58,022 INFO L226 Difference]: Without dead ends: 218 [2022-01-18 15:34:58,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:58,022 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:58,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 223 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 433 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-18 15:34:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-18 15:34:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 144. [2022-01-18 15:34:58,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.2167832167832167) internal successors, (317), 143 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 317 transitions. [2022-01-18 15:34:58,024 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 317 transitions. Word has length 18 [2022-01-18 15:34:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 317 transitions. [2022-01-18 15:34:58,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 317 transitions. [2022-01-18 15:34:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:58,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:58,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:58,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-01-18 15:34:58,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-01-18 15:34:58,225 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:34:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:34:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -890514595, now seen corresponding path program 281 times [2022-01-18 15:34:58,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:34:58,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325404086] [2022-01-18 15:34:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:34:58,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:34:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:34:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:58,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:34:58,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325404086] [2022-01-18 15:34:58,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325404086] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:34:58,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897375033] [2022-01-18 15:34:58,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:34:58,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:34:58,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:34:58,418 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:34:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-01-18 15:34:58,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:34:58,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:34:58,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:34:58,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:34:58,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:58,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:34:58,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:34:58,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:34:59,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:59,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:34:59,673 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:34:59,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:34:59,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:34:59,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:34:59,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897375033] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:34:59,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:34:59,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:34:59,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763239222] [2022-01-18 15:34:59,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:34:59,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:34:59,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:34:59,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:34:59,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:34:59,694 INFO L87 Difference]: Start difference. First operand 144 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:59,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:34:59,867 INFO L93 Difference]: Finished difference Result 223 states and 471 transitions. [2022-01-18 15:34:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:34:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:34:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:34:59,868 INFO L225 Difference]: With dead ends: 223 [2022-01-18 15:34:59,868 INFO L226 Difference]: Without dead ends: 220 [2022-01-18 15:34:59,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:34:59,868 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:34:59,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 175 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 364 Invalid, 0 Unknown, 106 Unchecked, 0.1s Time] [2022-01-18 15:34:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-18 15:34:59,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 142. [2022-01-18 15:34:59,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.219858156028369) internal successors, (313), 141 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:59,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 313 transitions. [2022-01-18 15:34:59,869 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 313 transitions. Word has length 18 [2022-01-18 15:34:59,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:34:59,870 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 313 transitions. [2022-01-18 15:34:59,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:34:59,870 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 313 transitions. [2022-01-18 15:34:59,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:34:59,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:34:59,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:34:59,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:00,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-01-18 15:35:00,070 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:00,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 58314637, now seen corresponding path program 282 times [2022-01-18 15:35:00,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:00,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887433014] [2022-01-18 15:35:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:00,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:00,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887433014] [2022-01-18 15:35:00,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887433014] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692496719] [2022-01-18 15:35:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:00,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:00,294 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:00,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-01-18 15:35:00,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:35:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:00,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:00,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:00,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:00,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:00,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:00,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:00,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:01,336 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:01,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:35:01,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:35:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:01,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692496719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:01,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:01,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:35:01,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370387947] [2022-01-18 15:35:01,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:01,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:01,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:01,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:01,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:01,356 INFO L87 Difference]: Start difference. First operand 142 states and 313 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:01,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:01,633 INFO L93 Difference]: Finished difference Result 235 states and 492 transitions. [2022-01-18 15:35:01,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:35:01,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:01,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:01,633 INFO L225 Difference]: With dead ends: 235 [2022-01-18 15:35:01,634 INFO L226 Difference]: Without dead ends: 228 [2022-01-18 15:35:01,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:01,634 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:01,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 179 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 525 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-01-18 15:35:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-18 15:35:01,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 143. [2022-01-18 15:35:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.232394366197183) internal successors, (317), 142 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 317 transitions. [2022-01-18 15:35:01,635 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 317 transitions. Word has length 18 [2022-01-18 15:35:01,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:01,636 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 317 transitions. [2022-01-18 15:35:01,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:01,636 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 317 transitions. [2022-01-18 15:35:01,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:01,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:01,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:01,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:01,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-01-18 15:35:01,836 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:01,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:01,837 INFO L85 PathProgramCache]: Analyzing trace with hash 42853841, now seen corresponding path program 283 times [2022-01-18 15:35:01,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:01,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792728615] [2022-01-18 15:35:01,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:01,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:01,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:02,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:02,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792728615] [2022-01-18 15:35:02,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792728615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:02,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281211681] [2022-01-18 15:35:02,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:02,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:02,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:02,095 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:02,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-01-18 15:35:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:02,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:02,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:02,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:02,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:02,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:02,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:02,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:02,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:03,132 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:03,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:35:03,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:35:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:03,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281211681] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:03,152 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:03,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:35:03,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272178213] [2022-01-18 15:35:03,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:03,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:35:03,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:03,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:35:03,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:35:03,152 INFO L87 Difference]: Start difference. First operand 143 states and 317 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:03,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:03,412 INFO L93 Difference]: Finished difference Result 226 states and 479 transitions. [2022-01-18 15:35:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:35:03,412 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:03,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:03,413 INFO L225 Difference]: With dead ends: 226 [2022-01-18 15:35:03,413 INFO L226 Difference]: Without dead ends: 219 [2022-01-18 15:35:03,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:03,413 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 194 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:03,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 218 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 518 Invalid, 0 Unknown, 194 Unchecked, 0.2s Time] [2022-01-18 15:35:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-18 15:35:03,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2022-01-18 15:35:03,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.2028985507246377) internal successors, (304), 138 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:03,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 304 transitions. [2022-01-18 15:35:03,415 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 304 transitions. Word has length 18 [2022-01-18 15:35:03,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:03,415 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 304 transitions. [2022-01-18 15:35:03,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:03,415 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 304 transitions. [2022-01-18 15:35:03,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:03,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:03,415 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:03,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-01-18 15:35:03,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-01-18 15:35:03,615 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:03,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1521139649, now seen corresponding path program 284 times [2022-01-18 15:35:03,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045459353] [2022-01-18 15:35:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:03,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:03,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:03,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045459353] [2022-01-18 15:35:03,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045459353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:03,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378148848] [2022-01-18 15:35:03,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:03,785 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:03,786 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:03,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-01-18 15:35:03,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:03,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:03,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:04,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:04,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:04,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:04,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:04,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:04,854 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:04,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:04,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:04,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:04,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378148848] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:04,878 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:04,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:35:04,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052871270] [2022-01-18 15:35:04,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:04,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:04,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:04,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:04,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:04,879 INFO L87 Difference]: Start difference. First operand 139 states and 304 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:05,202 INFO L93 Difference]: Finished difference Result 278 states and 567 transitions. [2022-01-18 15:35:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:05,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:05,203 INFO L225 Difference]: With dead ends: 278 [2022-01-18 15:35:05,203 INFO L226 Difference]: Without dead ends: 271 [2022-01-18 15:35:05,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:05,204 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:05,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 255 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 557 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-01-18 15:35:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-18 15:35:05,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 155. [2022-01-18 15:35:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.2467532467532467) internal successors, (346), 154 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 346 transitions. [2022-01-18 15:35:05,205 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 346 transitions. Word has length 18 [2022-01-18 15:35:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:05,205 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 346 transitions. [2022-01-18 15:35:05,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 346 transitions. [2022-01-18 15:35:05,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:05,206 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:05,206 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:05,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-01-18 15:35:05,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-01-18 15:35:05,406 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:05,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1903860037, now seen corresponding path program 285 times [2022-01-18 15:35:05,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:05,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013572805] [2022-01-18 15:35:05,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:05,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:05,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013572805] [2022-01-18 15:35:05,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013572805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:05,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785682105] [2022-01-18 15:35:05,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:05,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:05,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:05,608 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:05,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-01-18 15:35:05,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:35:05,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:05,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:05,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:06,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:06,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:06,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:06,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:06,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:06,700 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:06,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 117 [2022-01-18 15:35:06,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 84 [2022-01-18 15:35:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:06,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785682105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:06,723 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:06,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:35:06,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053621340] [2022-01-18 15:35:06,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:06,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:06,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:06,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:06,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:06,724 INFO L87 Difference]: Start difference. First operand 155 states and 346 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:07,104 INFO L93 Difference]: Finished difference Result 248 states and 532 transitions. [2022-01-18 15:35:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:07,104 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:07,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:07,104 INFO L225 Difference]: With dead ends: 248 [2022-01-18 15:35:07,104 INFO L226 Difference]: Without dead ends: 241 [2022-01-18 15:35:07,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:35:07,104 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 34 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:07,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 251 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 641 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2022-01-18 15:35:07,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-18 15:35:07,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 156. [2022-01-18 15:35:07,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.2580645161290325) internal successors, (350), 155 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:07,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 350 transitions. [2022-01-18 15:35:07,106 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 350 transitions. Word has length 18 [2022-01-18 15:35:07,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:07,106 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 350 transitions. [2022-01-18 15:35:07,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:07,106 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 350 transitions. [2022-01-18 15:35:07,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:07,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:07,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:07,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable305,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:07,307 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1270382783, now seen corresponding path program 286 times [2022-01-18 15:35:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141725009] [2022-01-18 15:35:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:07,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141725009] [2022-01-18 15:35:07,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141725009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353733891] [2022-01-18 15:35:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:07,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:07,499 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:07,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-01-18 15:35:07,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:07,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:07,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:07,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:07,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:07,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:07,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:07,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:07,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:08,374 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:08,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:08,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:08,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:08,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353733891] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:08,397 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:08,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:35:08,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765705812] [2022-01-18 15:35:08,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:08,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:08,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:08,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:08,398 INFO L87 Difference]: Start difference. First operand 156 states and 350 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:08,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:08,876 INFO L93 Difference]: Finished difference Result 273 states and 565 transitions. [2022-01-18 15:35:08,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:08,877 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:08,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:08,877 INFO L225 Difference]: With dead ends: 273 [2022-01-18 15:35:08,877 INFO L226 Difference]: Without dead ends: 266 [2022-01-18 15:35:08,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:35:08,877 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:08,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 229 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 745 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-01-18 15:35:08,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-18 15:35:08,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 157. [2022-01-18 15:35:08,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.269230769230769) internal successors, (354), 156 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 354 transitions. [2022-01-18 15:35:08,879 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 354 transitions. Word has length 18 [2022-01-18 15:35:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:08,879 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 354 transitions. [2022-01-18 15:35:08,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:08,879 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 354 transitions. [2022-01-18 15:35:08,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:08,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:08,880 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:08,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:09,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2022-01-18 15:35:09,080 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:09,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1285843579, now seen corresponding path program 287 times [2022-01-18 15:35:09,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:09,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824029154] [2022-01-18 15:35:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:09,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:09,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:09,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824029154] [2022-01-18 15:35:09,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824029154] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:09,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990809193] [2022-01-18 15:35:09,407 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:09,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:09,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:09,408 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:09,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-01-18 15:35:09,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:35:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:09,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:09,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:09,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:09,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:09,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:09,858 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:09,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:10,330 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:10,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:35:10,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:35:10,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:10,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990809193] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:10,353 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:10,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:35:10,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069400673] [2022-01-18 15:35:10,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:10,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:35:10,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:10,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:35:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=494, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:10,354 INFO L87 Difference]: Start difference. First operand 157 states and 354 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:11,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:11,333 INFO L93 Difference]: Finished difference Result 258 states and 550 transitions. [2022-01-18 15:35:11,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:11,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:11,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:11,334 INFO L225 Difference]: With dead ends: 258 [2022-01-18 15:35:11,334 INFO L226 Difference]: Without dead ends: 251 [2022-01-18 15:35:11,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:35:11,334 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:11,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 227 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 692 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-01-18 15:35:11,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-18 15:35:11,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 157. [2022-01-18 15:35:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.269230769230769) internal successors, (354), 156 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:11,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 354 transitions. [2022-01-18 15:35:11,336 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 354 transitions. Word has length 18 [2022-01-18 15:35:11,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:11,336 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 354 transitions. [2022-01-18 15:35:11,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:11,336 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 354 transitions. [2022-01-18 15:35:11,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:11,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:11,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:11,351 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-01-18 15:35:11,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:11,537 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:11,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:11,537 INFO L85 PathProgramCache]: Analyzing trace with hash 891167505, now seen corresponding path program 288 times [2022-01-18 15:35:11,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:11,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493596109] [2022-01-18 15:35:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:11,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:11,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:11,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:11,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493596109] [2022-01-18 15:35:11,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493596109] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:11,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686858799] [2022-01-18 15:35:11,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:11,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:11,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:11,717 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:11,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-01-18 15:35:11,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:35:11,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:11,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:11,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:12,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:12,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:12,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:12,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:12,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:12,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:12,695 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:12,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:35:12,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:35:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:12,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686858799] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:12,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:12,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:35:12,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259333889] [2022-01-18 15:35:12,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:12,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:12,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:12,725 INFO L87 Difference]: Start difference. First operand 157 states and 354 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:13,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:13,137 INFO L93 Difference]: Finished difference Result 326 states and 685 transitions. [2022-01-18 15:35:13,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:35:13,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:13,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:13,138 INFO L225 Difference]: With dead ends: 326 [2022-01-18 15:35:13,138 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 15:35:13,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:35:13,138 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:13,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 333 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 587 Invalid, 0 Unknown, 124 Unchecked, 0.2s Time] [2022-01-18 15:35:13,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 15:35:13,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 170. [2022-01-18 15:35:13,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.337278106508876) internal successors, (395), 169 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:13,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 395 transitions. [2022-01-18 15:35:13,140 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 395 transitions. Word has length 18 [2022-01-18 15:35:13,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:13,140 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 395 transitions. [2022-01-18 15:35:13,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 395 transitions. [2022-01-18 15:35:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:13,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:13,141 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:13,156 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-01-18 15:35:13,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:13,341 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:13,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:13,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1063062749, now seen corresponding path program 289 times [2022-01-18 15:35:13,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:13,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915532092] [2022-01-18 15:35:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:13,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:13,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:13,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:13,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915532092] [2022-01-18 15:35:13,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915532092] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:13,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767729481] [2022-01-18 15:35:13,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:13,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:13,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:13,549 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:13,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-01-18 15:35:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:13,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:13,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:14,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:14,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:14,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:14,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:14,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:14,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:14,627 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:14,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:35:14,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:35:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:14,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767729481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:14,660 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:14,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:35:14,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246292353] [2022-01-18 15:35:14,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:14,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:14,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:14,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:14,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:14,661 INFO L87 Difference]: Start difference. First operand 170 states and 395 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:15,262 INFO L93 Difference]: Finished difference Result 331 states and 686 transitions. [2022-01-18 15:35:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:35:15,262 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:15,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:15,262 INFO L225 Difference]: With dead ends: 331 [2022-01-18 15:35:15,262 INFO L226 Difference]: Without dead ends: 328 [2022-01-18 15:35:15,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:35:15,263 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 56 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:15,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 330 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 832 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-01-18 15:35:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-18 15:35:15,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 170. [2022-01-18 15:35:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.3491124260355027) internal successors, (397), 169 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:15,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 397 transitions. [2022-01-18 15:35:15,265 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 397 transitions. Word has length 18 [2022-01-18 15:35:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:15,265 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 397 transitions. [2022-01-18 15:35:15,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:15,265 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 397 transitions. [2022-01-18 15:35:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:15,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:15,265 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:15,287 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-01-18 15:35:15,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-01-18 15:35:15,466 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:15,466 INFO L85 PathProgramCache]: Analyzing trace with hash 2011891981, now seen corresponding path program 290 times [2022-01-18 15:35:15,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:15,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253084348] [2022-01-18 15:35:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:15,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:15,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:15,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253084348] [2022-01-18 15:35:15,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253084348] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:15,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077542676] [2022-01-18 15:35:15,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:15,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:15,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:15,659 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:15,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-01-18 15:35:15,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:15,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:15,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:15,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:15,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:15,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:15,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:15,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:16,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:16,558 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:16,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:35:16,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:35:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:16,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077542676] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:16,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:16,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:35:16,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237807819] [2022-01-18 15:35:16,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:16,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:16,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:16,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:16,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:16,593 INFO L87 Difference]: Start difference. First operand 170 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:17,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:17,314 INFO L93 Difference]: Finished difference Result 330 states and 690 transitions. [2022-01-18 15:35:17,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:35:17,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:17,315 INFO L225 Difference]: With dead ends: 330 [2022-01-18 15:35:17,315 INFO L226 Difference]: Without dead ends: 323 [2022-01-18 15:35:17,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:35:17,315 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:17,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 285 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 752 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-01-18 15:35:17,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-18 15:35:17,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 171. [2022-01-18 15:35:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.3588235294117648) internal successors, (401), 170 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:17,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 401 transitions. [2022-01-18 15:35:17,318 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 401 transitions. Word has length 18 [2022-01-18 15:35:17,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:17,318 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 401 transitions. [2022-01-18 15:35:17,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:17,318 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 401 transitions. [2022-01-18 15:35:17,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:17,319 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:17,319 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:17,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:17,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable310,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:17,519 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:17,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1996431185, now seen corresponding path program 291 times [2022-01-18 15:35:17,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638487406] [2022-01-18 15:35:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:17,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:17,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:17,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638487406] [2022-01-18 15:35:17,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638487406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160590519] [2022-01-18 15:35:17,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:17,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:17,838 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:17,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-01-18 15:35:17,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:35:17,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:17,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:17,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:18,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:18,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:18,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:18,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:18,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:18,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:18,673 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:18,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:35:18,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:35:18,703 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:18,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160590519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:18,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:18,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:35:18,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901614133] [2022-01-18 15:35:18,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:18,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:35:18,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:35:18,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:35:18,704 INFO L87 Difference]: Start difference. First operand 171 states and 401 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:19,395 INFO L93 Difference]: Finished difference Result 321 states and 677 transitions. [2022-01-18 15:35:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:35:19,396 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:19,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:19,396 INFO L225 Difference]: With dead ends: 321 [2022-01-18 15:35:19,396 INFO L226 Difference]: Without dead ends: 314 [2022-01-18 15:35:19,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:35:19,397 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:19,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 338 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 756 Invalid, 0 Unknown, 35 Unchecked, 0.3s Time] [2022-01-18 15:35:19,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-01-18 15:35:19,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 170. [2022-01-18 15:35:19,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.3491124260355027) internal successors, (397), 169 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:19,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 397 transitions. [2022-01-18 15:35:19,399 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 397 transitions. Word has length 18 [2022-01-18 15:35:19,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:19,399 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 397 transitions. [2022-01-18 15:35:19,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:19,399 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 397 transitions. [2022-01-18 15:35:19,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:19,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:19,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:19,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-01-18 15:35:19,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-01-18 15:35:19,599 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:19,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:19,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1207364159, now seen corresponding path program 292 times [2022-01-18 15:35:19,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:19,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925783744] [2022-01-18 15:35:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:19,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:19,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:19,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925783744] [2022-01-18 15:35:19,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925783744] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:19,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960706841] [2022-01-18 15:35:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:19,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:19,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:19,824 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:19,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-01-18 15:35:19,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:19,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:19,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:19,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:19,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:35:19,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:19,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:35:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:20,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:20,652 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:20,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:35:20,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:35:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:20,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960706841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:20,687 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:20,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:35:20,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381967012] [2022-01-18 15:35:20,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:20,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:20,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:20,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:20,687 INFO L87 Difference]: Start difference. First operand 170 states and 397 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:21,311 INFO L93 Difference]: Finished difference Result 349 states and 723 transitions. [2022-01-18 15:35:21,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:35:21,312 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:21,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:21,312 INFO L225 Difference]: With dead ends: 349 [2022-01-18 15:35:21,312 INFO L226 Difference]: Without dead ends: 342 [2022-01-18 15:35:21,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:35:21,313 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:21,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 324 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:35:21,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-01-18 15:35:21,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 173. [2022-01-18 15:35:21,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.372093023255814) internal successors, (408), 172 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:21,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 408 transitions. [2022-01-18 15:35:21,316 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 408 transitions. Word has length 18 [2022-01-18 15:35:21,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:21,316 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 408 transitions. [2022-01-18 15:35:21,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:21,316 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 408 transitions. [2022-01-18 15:35:21,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:21,316 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:21,316 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:21,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-01-18 15:35:21,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-01-18 15:35:21,516 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:21,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:21,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1222824955, now seen corresponding path program 293 times [2022-01-18 15:35:21,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:21,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490788444] [2022-01-18 15:35:21,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:21,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:21,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490788444] [2022-01-18 15:35:21,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490788444] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:21,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60409075] [2022-01-18 15:35:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:21,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:21,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:21,679 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:21,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-01-18 15:35:21,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:35:21,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:21,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:21,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:21,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:21,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:35:21,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:21,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:35:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:22,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:22,452 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:22,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:35:22,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:35:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:22,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60409075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:22,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:22,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 15:35:22,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451197513] [2022-01-18 15:35:22,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:22,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:35:22,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:22,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:35:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:35:22,487 INFO L87 Difference]: Start difference. First operand 173 states and 408 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:23,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:23,046 INFO L93 Difference]: Finished difference Result 351 states and 725 transitions. [2022-01-18 15:35:23,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:35:23,047 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:23,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:23,047 INFO L225 Difference]: With dead ends: 351 [2022-01-18 15:35:23,047 INFO L226 Difference]: Without dead ends: 344 [2022-01-18 15:35:23,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:35:23,047 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 84 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:23,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 290 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:35:23,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-18 15:35:23,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 172. [2022-01-18 15:35:23,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.3625730994152048) internal successors, (404), 171 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:23,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 404 transitions. [2022-01-18 15:35:23,050 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 404 transitions. Word has length 18 [2022-01-18 15:35:23,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:23,050 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 404 transitions. [2022-01-18 15:35:23,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:23,050 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 404 transitions. [2022-01-18 15:35:23,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:23,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:23,050 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:23,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-01-18 15:35:23,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:23,250 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:23,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:23,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1794279761, now seen corresponding path program 294 times [2022-01-18 15:35:23,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:23,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469842255] [2022-01-18 15:35:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:23,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:23,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:23,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469842255] [2022-01-18 15:35:23,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469842255] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540031911] [2022-01-18 15:35:23,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:23,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:23,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:23,435 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:23,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-01-18 15:35:23,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:35:23,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:23,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:23,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:23,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:23,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 116 [2022-01-18 15:35:23,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:23,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 96 [2022-01-18 15:35:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:23,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:24,335 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:24,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:35:24,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:35:24,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540031911] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:24,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:24,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:35:24,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652012865] [2022-01-18 15:35:24,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:24,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:35:24,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:24,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:35:24,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:35:24,370 INFO L87 Difference]: Start difference. First operand 172 states and 404 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:25,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:25,021 INFO L93 Difference]: Finished difference Result 334 states and 697 transitions. [2022-01-18 15:35:25,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:35:25,021 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:25,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:25,022 INFO L225 Difference]: With dead ends: 334 [2022-01-18 15:35:25,022 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 15:35:25,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:35:25,023 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:25,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 361 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:35:25,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 15:35:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 172. [2022-01-18 15:35:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.3625730994152048) internal successors, (404), 171 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:25,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 404 transitions. [2022-01-18 15:35:25,026 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 404 transitions. Word has length 18 [2022-01-18 15:35:25,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:25,026 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 404 transitions. [2022-01-18 15:35:25,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 404 transitions. [2022-01-18 15:35:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:25,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:25,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:25,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-01-18 15:35:25,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:25,227 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1890207935, now seen corresponding path program 295 times [2022-01-18 15:35:25,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:25,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832001710] [2022-01-18 15:35:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:25,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:25,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832001710] [2022-01-18 15:35:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832001710] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:25,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509927992] [2022-01-18 15:35:25,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:25,433 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:25,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:25,434 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:25,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-01-18 15:35:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:25,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:25,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:25,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:25,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:25,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:25,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:26,082 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:26,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:26,768 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:26,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:26,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:26,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509927992] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:26,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:26,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:35:26,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305500886] [2022-01-18 15:35:26,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:26,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:35:26,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:35:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:26,789 INFO L87 Difference]: Start difference. First operand 172 states and 404 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:27,075 INFO L93 Difference]: Finished difference Result 297 states and 651 transitions. [2022-01-18 15:35:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:27,076 INFO L225 Difference]: With dead ends: 297 [2022-01-18 15:35:27,076 INFO L226 Difference]: Without dead ends: 290 [2022-01-18 15:35:27,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:27,076 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 57 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:27,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 375 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 560 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-01-18 15:35:27,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-18 15:35:27,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 197. [2022-01-18 15:35:27,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.4081632653061225) internal successors, (472), 196 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:27,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 472 transitions. [2022-01-18 15:35:27,078 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 472 transitions. Word has length 18 [2022-01-18 15:35:27,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:27,078 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 472 transitions. [2022-01-18 15:35:27,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:27,078 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 472 transitions. [2022-01-18 15:35:27,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:27,079 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:27,079 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:27,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-01-18 15:35:27,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:27,279 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:27,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:27,279 INFO L85 PathProgramCache]: Analyzing trace with hash 2043669153, now seen corresponding path program 296 times [2022-01-18 15:35:27,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:27,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321990028] [2022-01-18 15:35:27,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:27,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:27,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:27,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321990028] [2022-01-18 15:35:27,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321990028] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:27,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370366935] [2022-01-18 15:35:27,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:27,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:27,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:27,482 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:27,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-01-18 15:35:27,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:27,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:27,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:35:27,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:28,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:28,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 105 [2022-01-18 15:35:28,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:28,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 87 [2022-01-18 15:35:28,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:28,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:29,481 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:29,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 173 [2022-01-18 15:35:29,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 128 [2022-01-18 15:35:29,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:29,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370366935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:29,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:29,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:29,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356167850] [2022-01-18 15:35:29,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:29,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:29,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:29,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:29,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:29,605 INFO L87 Difference]: Start difference. First operand 197 states and 472 transitions. Second operand has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:30,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:30,038 INFO L93 Difference]: Finished difference Result 318 states and 665 transitions. [2022-01-18 15:35:30,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:30,039 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:30,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:30,039 INFO L225 Difference]: With dead ends: 318 [2022-01-18 15:35:30,039 INFO L226 Difference]: Without dead ends: 312 [2022-01-18 15:35:30,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:30,039 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 624 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:30,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 390 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 689 Invalid, 0 Unknown, 95 Unchecked, 0.3s Time] [2022-01-18 15:35:30,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-18 15:35:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 192. [2022-01-18 15:35:30,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.397905759162304) internal successors, (458), 191 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:30,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 458 transitions. [2022-01-18 15:35:30,042 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 458 transitions. Word has length 18 [2022-01-18 15:35:30,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:30,042 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 458 transitions. [2022-01-18 15:35:30,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:30,042 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 458 transitions. [2022-01-18 15:35:30,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:30,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:30,042 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:30,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Ended with exit code 0 [2022-01-18 15:35:30,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable316,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:30,242 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:30,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:30,243 INFO L85 PathProgramCache]: Analyzing trace with hash 869638075, now seen corresponding path program 297 times [2022-01-18 15:35:30,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:30,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240435379] [2022-01-18 15:35:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:30,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:30,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:30,457 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:30,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240435379] [2022-01-18 15:35:30,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240435379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:30,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420806537] [2022-01-18 15:35:30,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:30,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:30,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:30,458 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:30,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-01-18 15:35:30,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:35:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:30,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:31,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:31,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:31,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:31,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:31,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:31,820 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:31,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 114 [2022-01-18 15:35:31,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 81 [2022-01-18 15:35:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:31,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420806537] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:31,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:31,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:31,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589595738] [2022-01-18 15:35:31,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:31,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:31,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:31,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:31,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:31,846 INFO L87 Difference]: Start difference. First operand 192 states and 458 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:32,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:32,088 INFO L93 Difference]: Finished difference Result 284 states and 635 transitions. [2022-01-18 15:35:32,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:32,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:32,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:32,089 INFO L225 Difference]: With dead ends: 284 [2022-01-18 15:35:32,089 INFO L226 Difference]: Without dead ends: 277 [2022-01-18 15:35:32,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:35:32,089 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:32,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 374 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-01-18 15:35:32,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-18 15:35:32,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 203. [2022-01-18 15:35:32,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.405940594059406) internal successors, (486), 202 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:32,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 486 transitions. [2022-01-18 15:35:32,092 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 486 transitions. Word has length 18 [2022-01-18 15:35:32,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:32,092 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 486 transitions. [2022-01-18 15:35:32,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:32,092 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 486 transitions. [2022-01-18 15:35:32,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:32,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:32,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:32,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-01-18 15:35:32,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:32,293 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1041533319, now seen corresponding path program 298 times [2022-01-18 15:35:32,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:32,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344645283] [2022-01-18 15:35:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:32,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:32,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:32,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344645283] [2022-01-18 15:35:32,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344645283] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:32,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884383373] [2022-01-18 15:35:32,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:32,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:32,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:32,514 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:32,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-01-18 15:35:32,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:32,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:32,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:33,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:33,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:35:33,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:33,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:35:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:33,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:33,949 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:33,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:35:33,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:35:33,972 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:33,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884383373] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:33,972 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:33,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:33,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976787754] [2022-01-18 15:35:33,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:33,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:33,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:33,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:33,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:33,973 INFO L87 Difference]: Start difference. First operand 203 states and 486 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:34,520 INFO L93 Difference]: Finished difference Result 316 states and 676 transitions. [2022-01-18 15:35:34,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:34,520 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:34,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:34,521 INFO L225 Difference]: With dead ends: 316 [2022-01-18 15:35:34,521 INFO L226 Difference]: Without dead ends: 313 [2022-01-18 15:35:34,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:35:34,521 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 74 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:34,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 349 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 644 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-01-18 15:35:34,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-18 15:35:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 201. [2022-01-18 15:35:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.41) internal successors, (482), 200 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:34,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 482 transitions. [2022-01-18 15:35:34,524 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 482 transitions. Word has length 18 [2022-01-18 15:35:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:34,524 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 482 transitions. [2022-01-18 15:35:34,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 482 transitions. [2022-01-18 15:35:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:34,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:34,524 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:34,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-01-18 15:35:34,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:34,725 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1023099293, now seen corresponding path program 299 times [2022-01-18 15:35:34,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985852617] [2022-01-18 15:35:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:34,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:34,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985852617] [2022-01-18 15:35:34,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985852617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:34,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620206941] [2022-01-18 15:35:34,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:34,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:34,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:34,946 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:34,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-01-18 15:35:34,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:35:34,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:34,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:34,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:35,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:35,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:35:35,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:35,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:35:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:35,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:36,397 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:36,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:35:36,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:35:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:36,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620206941] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:36,420 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:36,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:36,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548668244] [2022-01-18 15:35:36,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:36,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:36,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:36,420 INFO L87 Difference]: Start difference. First operand 201 states and 482 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:36,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:36,887 INFO L93 Difference]: Finished difference Result 299 states and 657 transitions. [2022-01-18 15:35:36,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:36,888 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:36,888 INFO L225 Difference]: With dead ends: 299 [2022-01-18 15:35:36,888 INFO L226 Difference]: Without dead ends: 296 [2022-01-18 15:35:36,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:35:36,889 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 60 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:36,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 308 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 501 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2022-01-18 15:35:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-18 15:35:36,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 199. [2022-01-18 15:35:36,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.414141414141414) internal successors, (478), 198 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:36,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 478 transitions. [2022-01-18 15:35:36,892 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 478 transitions. Word has length 18 [2022-01-18 15:35:36,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:36,892 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 478 transitions. [2022-01-18 15:35:36,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:36,892 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 478 transitions. [2022-01-18 15:35:36,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:36,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:36,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:36,929 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-01-18 15:35:37,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-01-18 15:35:37,115 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1252358463, now seen corresponding path program 300 times [2022-01-18 15:35:37,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080046940] [2022-01-18 15:35:37,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:37,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:37,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:37,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080046940] [2022-01-18 15:35:37,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080046940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:37,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7759927] [2022-01-18 15:35:37,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:37,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:37,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:37,334 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:37,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-01-18 15:35:37,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:35:37,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:37,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:37,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:37,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:37,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:35:37,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:37,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:35:38,079 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:38,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:38,720 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:38,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:38,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:38,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:38,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7759927] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:38,743 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:38,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:35:38,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136959180] [2022-01-18 15:35:38,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:38,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:35:38,743 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:38,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:35:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:38,743 INFO L87 Difference]: Start difference. First operand 199 states and 478 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:39,264 INFO L93 Difference]: Finished difference Result 331 states and 717 transitions. [2022-01-18 15:35:39,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:35:39,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:39,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:39,265 INFO L225 Difference]: With dead ends: 331 [2022-01-18 15:35:39,265 INFO L226 Difference]: Without dead ends: 317 [2022-01-18 15:35:39,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:35:39,265 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 75 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:39,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 327 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 538 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-01-18 15:35:39,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-18 15:35:39,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 203. [2022-01-18 15:35:39,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.4207920792079207) internal successors, (489), 202 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:39,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 489 transitions. [2022-01-18 15:35:39,268 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 489 transitions. Word has length 18 [2022-01-18 15:35:39,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:39,268 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 489 transitions. [2022-01-18 15:35:39,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:39,268 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 489 transitions. [2022-01-18 15:35:39,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:39,268 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:39,268 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:39,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-01-18 15:35:39,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable320,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:39,469 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:39,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:39,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1424253707, now seen corresponding path program 301 times [2022-01-18 15:35:39,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:39,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866137862] [2022-01-18 15:35:39,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:39,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:39,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:39,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866137862] [2022-01-18 15:35:39,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866137862] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:39,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246218643] [2022-01-18 15:35:39,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:39,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:39,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:39,690 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:39,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-01-18 15:35:39,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:39,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:39,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:40,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:40,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:35:40,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:40,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:35:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:40,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:41,099 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:41,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:41,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:41,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246218643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:41,121 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:41,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:35:41,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198486847] [2022-01-18 15:35:41,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:41,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:35:41,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:35:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:35:41,122 INFO L87 Difference]: Start difference. First operand 203 states and 489 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:41,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:41,710 INFO L93 Difference]: Finished difference Result 327 states and 694 transitions. [2022-01-18 15:35:41,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:41,710 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:41,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:41,711 INFO L225 Difference]: With dead ends: 327 [2022-01-18 15:35:41,711 INFO L226 Difference]: Without dead ends: 324 [2022-01-18 15:35:41,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:35:41,711 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 63 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:41,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 342 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 716 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-01-18 15:35:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-18 15:35:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 201. [2022-01-18 15:35:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.425) internal successors, (485), 200 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 485 transitions. [2022-01-18 15:35:41,713 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 485 transitions. Word has length 18 [2022-01-18 15:35:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:41,714 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 485 transitions. [2022-01-18 15:35:41,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 485 transitions. [2022-01-18 15:35:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:41,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:41,714 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:41,732 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-01-18 15:35:41,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-01-18 15:35:41,914 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:41,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:41,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1921884357, now seen corresponding path program 302 times [2022-01-18 15:35:41,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:41,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067140594] [2022-01-18 15:35:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:41,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:41,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:42,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:42,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:42,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067140594] [2022-01-18 15:35:42,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067140594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:42,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637838908] [2022-01-18 15:35:42,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:42,127 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:42,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:42,128 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:42,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-01-18 15:35:42,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:42,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:42,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:35:42,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:42,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:42,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:42,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:42,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:43,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:44,246 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:44,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 181 treesize of output 158 [2022-01-18 15:35:44,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 125 [2022-01-18 15:35:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:44,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637838908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:44,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:44,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:44,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410153830] [2022-01-18 15:35:44,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:44,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:44,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:44,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:44,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:44,372 INFO L87 Difference]: Start difference. First operand 201 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:45,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:45,061 INFO L93 Difference]: Finished difference Result 347 states and 737 transitions. [2022-01-18 15:35:45,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:35:45,062 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:45,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:45,062 INFO L225 Difference]: With dead ends: 347 [2022-01-18 15:35:45,062 INFO L226 Difference]: Without dead ends: 333 [2022-01-18 15:35:45,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:35:45,062 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:45,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 336 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 778 Invalid, 0 Unknown, 79 Unchecked, 0.4s Time] [2022-01-18 15:35:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-18 15:35:45,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 201. [2022-01-18 15:35:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.425) internal successors, (485), 200 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:45,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 485 transitions. [2022-01-18 15:35:45,065 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 485 transitions. Word has length 18 [2022-01-18 15:35:45,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:45,065 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 485 transitions. [2022-01-18 15:35:45,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:45,065 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 485 transitions. [2022-01-18 15:35:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:45,065 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:45,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:45,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:45,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-01-18 15:35:45,266 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:45,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:45,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1937345153, now seen corresponding path program 303 times [2022-01-18 15:35:45,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:45,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851527503] [2022-01-18 15:35:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:45,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:45,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:45,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851527503] [2022-01-18 15:35:45,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851527503] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32405338] [2022-01-18 15:35:45,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:45,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:45,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:45,465 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:45,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-01-18 15:35:45,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:35:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:45,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:35:45,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:46,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:46,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:46,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:46,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:46,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:47,623 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:47,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 157 [2022-01-18 15:35:47,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 124 [2022-01-18 15:35:47,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:47,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32405338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:47,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:47,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:35:47,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488887094] [2022-01-18 15:35:47,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:47,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:35:47,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:47,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:35:47,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:47,758 INFO L87 Difference]: Start difference. First operand 201 states and 485 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:48,450 INFO L93 Difference]: Finished difference Result 308 states and 675 transitions. [2022-01-18 15:35:48,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:35:48,450 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:48,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:48,450 INFO L225 Difference]: With dead ends: 308 [2022-01-18 15:35:48,451 INFO L226 Difference]: Without dead ends: 294 [2022-01-18 15:35:48,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:35:48,451 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 73 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:48,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 325 Invalid, 991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 841 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-01-18 15:35:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-01-18 15:35:48,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 197. [2022-01-18 15:35:48,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.4081632653061225) internal successors, (472), 196 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:48,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 472 transitions. [2022-01-18 15:35:48,453 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 472 transitions. Word has length 18 [2022-01-18 15:35:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:48,453 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 472 transitions. [2022-01-18 15:35:48,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 472 transitions. [2022-01-18 15:35:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:48,453 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:48,453 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:48,468 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-01-18 15:35:48,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-01-18 15:35:48,654 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:48,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:48,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1300993595, now seen corresponding path program 304 times [2022-01-18 15:35:48,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:48,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380046337] [2022-01-18 15:35:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:48,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:48,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380046337] [2022-01-18 15:35:48,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380046337] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:48,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302613425] [2022-01-18 15:35:48,829 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:48,829 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:48,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:48,830 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:48,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-01-18 15:35:48,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:48,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:48,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:48,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:49,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:49,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:35:49,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:49,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:35:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:49,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:49,842 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:49,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:35:49,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:35:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:49,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302613425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:49,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:49,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:35:49,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132286841] [2022-01-18 15:35:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:49,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:49,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:49,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:49,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:49,864 INFO L87 Difference]: Start difference. First operand 197 states and 472 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:50,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:50,135 INFO L93 Difference]: Finished difference Result 246 states and 564 transitions. [2022-01-18 15:35:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:35:50,136 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:50,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:50,136 INFO L225 Difference]: With dead ends: 246 [2022-01-18 15:35:50,136 INFO L226 Difference]: Without dead ends: 239 [2022-01-18 15:35:50,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:35:50,136 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:50,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 155 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 480 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-01-18 15:35:50,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-18 15:35:50,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 197. [2022-01-18 15:35:50,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.4081632653061225) internal successors, (472), 196 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:50,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 472 transitions. [2022-01-18 15:35:50,139 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 472 transitions. Word has length 18 [2022-01-18 15:35:50,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:50,139 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 472 transitions. [2022-01-18 15:35:50,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:50,139 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 472 transitions. [2022-01-18 15:35:50,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:50,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:50,139 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:50,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-01-18 15:35:50,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-01-18 15:35:50,339 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1683713983, now seen corresponding path program 305 times [2022-01-18 15:35:50,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563305885] [2022-01-18 15:35:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:50,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:50,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:50,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563305885] [2022-01-18 15:35:50,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563305885] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:50,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797795663] [2022-01-18 15:35:50,514 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:35:50,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:50,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:50,515 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-01-18 15:35:50,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:35:50,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:50,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:50,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:51,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:51,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 101 [2022-01-18 15:35:51,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:51,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2022-01-18 15:35:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:51,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:51,626 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:51,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:35:51,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:35:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:51,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797795663] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:51,648 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:51,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:35:51,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395899383] [2022-01-18 15:35:51,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:51,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:35:51,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:51,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:35:51,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:35:51,649 INFO L87 Difference]: Start difference. First operand 197 states and 472 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:51,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:51,962 INFO L93 Difference]: Finished difference Result 242 states and 561 transitions. [2022-01-18 15:35:51,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:51,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:51,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:51,963 INFO L225 Difference]: With dead ends: 242 [2022-01-18 15:35:51,963 INFO L226 Difference]: Without dead ends: 235 [2022-01-18 15:35:51,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:51,963 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:51,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 164 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 534 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2022-01-18 15:35:51,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-18 15:35:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 204. [2022-01-18 15:35:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.4088669950738915) internal successors, (489), 203 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 489 transitions. [2022-01-18 15:35:51,965 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 489 transitions. Word has length 18 [2022-01-18 15:35:51,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 489 transitions. [2022-01-18 15:35:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 489 transitions. [2022-01-18 15:35:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:51,966 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:51,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:51,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-01-18 15:35:52,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:52,166 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:52,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:52,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1490528837, now seen corresponding path program 306 times [2022-01-18 15:35:52,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:52,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964852658] [2022-01-18 15:35:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:52,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:52,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:52,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964852658] [2022-01-18 15:35:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964852658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:52,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949325579] [2022-01-18 15:35:52,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:35:52,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:52,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:52,349 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:52,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-01-18 15:35:52,373 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:35:52,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:52,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:52,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:52,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:52,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:52,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:52,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:52,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:53,275 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:53,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:35:53,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:35:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949325579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:53,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:53,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:35:53,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434921454] [2022-01-18 15:35:53,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:53,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:53,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:53,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:53,300 INFO L87 Difference]: Start difference. First operand 204 states and 489 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:53,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:53,674 INFO L93 Difference]: Finished difference Result 252 states and 577 transitions. [2022-01-18 15:35:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:53,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:53,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:53,675 INFO L225 Difference]: With dead ends: 252 [2022-01-18 15:35:53,675 INFO L226 Difference]: Without dead ends: 245 [2022-01-18 15:35:53,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:35:53,675 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:53,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 95 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 418 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2022-01-18 15:35:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-18 15:35:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 205. [2022-01-18 15:35:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.4166666666666665) internal successors, (493), 204 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 493 transitions. [2022-01-18 15:35:53,678 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 493 transitions. Word has length 18 [2022-01-18 15:35:53,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:53,678 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 493 transitions. [2022-01-18 15:35:53,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:53,678 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 493 transitions. [2022-01-18 15:35:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:53,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:53,678 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:53,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:53,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:53,878 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:53,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:53,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1505989633, now seen corresponding path program 307 times [2022-01-18 15:35:53,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:53,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982340880] [2022-01-18 15:35:53,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:53,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:54,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:54,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:54,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982340880] [2022-01-18 15:35:54,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982340880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:54,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083913528] [2022-01-18 15:35:54,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:35:54,062 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:54,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:54,063 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:54,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-01-18 15:35:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:54,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:54,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:54,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:54,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:54,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:54,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:55,018 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:35:55,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:35:55,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:35:55,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:55,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083913528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:55,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:55,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:35:55,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715346043] [2022-01-18 15:35:55,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:55,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:55,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:55,043 INFO L87 Difference]: Start difference. First operand 205 states and 493 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:55,401 INFO L93 Difference]: Finished difference Result 243 states and 564 transitions. [2022-01-18 15:35:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:55,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:55,401 INFO L225 Difference]: With dead ends: 243 [2022-01-18 15:35:55,401 INFO L226 Difference]: Without dead ends: 236 [2022-01-18 15:35:55,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:35:55,401 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:55,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 104 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 414 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-01-18 15:35:55,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-18 15:35:55,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 203. [2022-01-18 15:35:55,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 2.405940594059406) internal successors, (486), 202 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:55,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 486 transitions. [2022-01-18 15:35:55,404 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 486 transitions. Word has length 18 [2022-01-18 15:35:55,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:55,404 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 486 transitions. [2022-01-18 15:35:55,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:55,404 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 486 transitions. [2022-01-18 15:35:55,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:55,404 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:55,404 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:55,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:55,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2022-01-18 15:35:55,605 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:55,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:55,605 INFO L85 PathProgramCache]: Analyzing trace with hash -657675969, now seen corresponding path program 308 times [2022-01-18 15:35:55,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:55,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2717731] [2022-01-18 15:35:55,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:55,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:55,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:55,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2717731] [2022-01-18 15:35:55,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2717731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:55,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726973087] [2022-01-18 15:35:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:35:55,801 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:55,802 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:55,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-01-18 15:35:55,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:35:55,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:55,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:56,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:56,164 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:35:56,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:56,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:35:56,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:56,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:56,781 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:56,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 107 [2022-01-18 15:35:56,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2022-01-18 15:35:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:56,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726973087] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:56,806 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:56,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:35:56,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56707859] [2022-01-18 15:35:56,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:56,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:56,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:56,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:56,806 INFO L87 Difference]: Start difference. First operand 203 states and 486 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:57,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:57,152 INFO L93 Difference]: Finished difference Result 289 states and 654 transitions. [2022-01-18 15:35:57,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:57,152 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:57,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:57,153 INFO L225 Difference]: With dead ends: 289 [2022-01-18 15:35:57,153 INFO L226 Difference]: Without dead ends: 282 [2022-01-18 15:35:57,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:57,153 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:57,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 258 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-01-18 15:35:57,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-01-18 15:35:57,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 211. [2022-01-18 15:35:57,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.4285714285714284) internal successors, (510), 210 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:57,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 510 transitions. [2022-01-18 15:35:57,155 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 510 transitions. Word has length 18 [2022-01-18 15:35:57,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:57,155 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 510 transitions. [2022-01-18 15:35:57,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:57,155 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 510 transitions. [2022-01-18 15:35:57,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:57,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:57,156 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:57,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Forceful destruction successful, exit code 0 [2022-01-18 15:35:57,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2022-01-18 15:35:57,356 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:57,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash -485780725, now seen corresponding path program 309 times [2022-01-18 15:35:57,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:57,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619148207] [2022-01-18 15:35:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:57,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:57,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619148207] [2022-01-18 15:35:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619148207] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:57,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832106609] [2022-01-18 15:35:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:35:57,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:57,541 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:57,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-01-18 15:35:57,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:35:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:57,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:57,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:57,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:57,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:35:57,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:57,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:35:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:58,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:35:58,588 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:35:58,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:35:58,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:35:58,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:58,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832106609] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:35:58,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:35:58,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:35:58,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192079601] [2022-01-18 15:35:58,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:35:58,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:35:58,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:35:58,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:35:58,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:35:58,613 INFO L87 Difference]: Start difference. First operand 211 states and 510 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:58,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:35:58,939 INFO L93 Difference]: Finished difference Result 294 states and 655 transitions. [2022-01-18 15:35:58,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:35:58,940 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:35:58,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:35:58,940 INFO L225 Difference]: With dead ends: 294 [2022-01-18 15:35:58,940 INFO L226 Difference]: Without dead ends: 291 [2022-01-18 15:35:58,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:35:58,940 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:35:58,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 220 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 594 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-18 15:35:58,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-18 15:35:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 211. [2022-01-18 15:35:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.4285714285714284) internal successors, (510), 210 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 510 transitions. [2022-01-18 15:35:58,943 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 510 transitions. Word has length 18 [2022-01-18 15:35:58,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:35:58,943 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 510 transitions. [2022-01-18 15:35:58,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:35:58,943 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 510 transitions. [2022-01-18 15:35:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:35:58,943 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:35:58,943 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:35:58,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-01-18 15:35:59,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:59,143 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:35:59,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:35:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash 463048507, now seen corresponding path program 310 times [2022-01-18 15:35:59,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:35:59,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423046989] [2022-01-18 15:35:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:35:59,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:35:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:35:59,296 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:59,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:35:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423046989] [2022-01-18 15:35:59,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423046989] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:35:59,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138087095] [2022-01-18 15:35:59,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:35:59,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:35:59,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:35:59,297 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:35:59,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-01-18 15:35:59,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:35:59,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:35:59,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:35:59,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:35:59,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:59,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:35:59,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:35:59,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:35:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:35:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:00,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:00,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:36:00,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:36:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:00,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138087095] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:00,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:00,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 20 [2022-01-18 15:36:00,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481359364] [2022-01-18 15:36:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:00,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:00,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:00,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:00,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:00,088 INFO L87 Difference]: Start difference. First operand 211 states and 510 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:00,473 INFO L93 Difference]: Finished difference Result 292 states and 655 transitions. [2022-01-18 15:36:00,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:36:00,474 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:00,474 INFO L225 Difference]: With dead ends: 292 [2022-01-18 15:36:00,474 INFO L226 Difference]: Without dead ends: 285 [2022-01-18 15:36:00,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:36:00,474 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 67 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:00,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 164 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 501 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-01-18 15:36:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-18 15:36:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 212. [2022-01-18 15:36:00,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.4360189573459716) internal successors, (514), 211 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:00,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 514 transitions. [2022-01-18 15:36:00,476 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 514 transitions. Word has length 18 [2022-01-18 15:36:00,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:00,476 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 514 transitions. [2022-01-18 15:36:00,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:00,477 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 514 transitions. [2022-01-18 15:36:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:00,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:00,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:00,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-01-18 15:36:00,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:00,677 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 447587711, now seen corresponding path program 311 times [2022-01-18 15:36:00,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:00,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356864072] [2022-01-18 15:36:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:00,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:00,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:00,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356864072] [2022-01-18 15:36:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356864072] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:00,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823585298] [2022-01-18 15:36:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:00,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:00,817 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:00,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-01-18 15:36:00,842 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:36:00,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:00,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:01,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:01,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:01,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:01,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:01,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:01,607 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:01,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:36:01,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:36:01,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:01,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823585298] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:01,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:01,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 20 [2022-01-18 15:36:01,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343179570] [2022-01-18 15:36:01,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:01,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:01,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:01,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:01,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:01,634 INFO L87 Difference]: Start difference. First operand 212 states and 514 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:02,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:02,071 INFO L93 Difference]: Finished difference Result 283 states and 642 transitions. [2022-01-18 15:36:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:36:02,072 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:02,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:02,072 INFO L225 Difference]: With dead ends: 283 [2022-01-18 15:36:02,072 INFO L226 Difference]: Without dead ends: 276 [2022-01-18 15:36:02,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:36:02,073 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:02,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 169 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 532 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-01-18 15:36:02,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-18 15:36:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 212. [2022-01-18 15:36:02,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.4360189573459716) internal successors, (514), 211 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:02,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 514 transitions. [2022-01-18 15:36:02,075 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 514 transitions. Word has length 18 [2022-01-18 15:36:02,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:02,075 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 514 transitions. [2022-01-18 15:36:02,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:02,075 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 514 transitions. [2022-01-18 15:36:02,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:02,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:02,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:02,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:02,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2022-01-18 15:36:02,291 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:02,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1538759663, now seen corresponding path program 312 times [2022-01-18 15:36:02,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:02,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084219035] [2022-01-18 15:36:02,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:02,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:02,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084219035] [2022-01-18 15:36:02,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084219035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:02,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279357025] [2022-01-18 15:36:02,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:02,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:02,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:02,470 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:02,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-01-18 15:36:02,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:36:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:36:02,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:02,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:02,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:36:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:02,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:36:03,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:03,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:03,835 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:03,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 165 treesize of output 148 [2022-01-18 15:36:03,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 125 [2022-01-18 15:36:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279357025] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:03,930 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:03,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:36:03,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785972334] [2022-01-18 15:36:03,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:03,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:03,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:03,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:03,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:03,930 INFO L87 Difference]: Start difference. First operand 212 states and 514 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:05,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:05,432 INFO L93 Difference]: Finished difference Result 364 states and 795 transitions. [2022-01-18 15:36:05,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:36:05,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:05,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:05,433 INFO L225 Difference]: With dead ends: 364 [2022-01-18 15:36:05,433 INFO L226 Difference]: Without dead ends: 337 [2022-01-18 15:36:05,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:36:05,433 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 71 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:05,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 249 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 750 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-01-18 15:36:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-18 15:36:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 214. [2022-01-18 15:36:05,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.4507042253521125) internal successors, (522), 213 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 522 transitions. [2022-01-18 15:36:05,436 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 522 transitions. Word has length 18 [2022-01-18 15:36:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:05,436 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 522 transitions. [2022-01-18 15:36:05,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 522 transitions. [2022-01-18 15:36:05,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:05,436 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:05,437 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:05,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-01-18 15:36:05,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-01-18 15:36:05,637 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:05,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:05,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1523298867, now seen corresponding path program 313 times [2022-01-18 15:36:05,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:05,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430008976] [2022-01-18 15:36:05,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:05,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:05,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430008976] [2022-01-18 15:36:05,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430008976] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442549018] [2022-01-18 15:36:05,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:05,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:05,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:05,809 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:05,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-01-18 15:36:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:05,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:05,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:05,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:05,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:36:05,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:05,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:36:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:06,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:06,529 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:06,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 93 [2022-01-18 15:36:06,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-01-18 15:36:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:06,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442549018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:06,555 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:06,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:36:06,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159201063] [2022-01-18 15:36:06,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:06,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:36:06,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:36:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:36:06,555 INFO L87 Difference]: Start difference. First operand 214 states and 522 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:07,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:07,056 INFO L93 Difference]: Finished difference Result 304 states and 676 transitions. [2022-01-18 15:36:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:36:07,057 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:07,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:07,057 INFO L225 Difference]: With dead ends: 304 [2022-01-18 15:36:07,057 INFO L226 Difference]: Without dead ends: 297 [2022-01-18 15:36:07,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:36:07,057 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 59 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:07,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 229 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:07,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-18 15:36:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 214. [2022-01-18 15:36:07,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.4507042253521125) internal successors, (522), 213 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:07,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 522 transitions. [2022-01-18 15:36:07,060 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 522 transitions. Word has length 18 [2022-01-18 15:36:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:07,060 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 522 transitions. [2022-01-18 15:36:07,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 522 transitions. [2022-01-18 15:36:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:07,060 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:07,060 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:07,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:07,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-01-18 15:36:07,261 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:07,261 INFO L85 PathProgramCache]: Analyzing trace with hash 951844061, now seen corresponding path program 314 times [2022-01-18 15:36:07,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:07,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70361583] [2022-01-18 15:36:07,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:07,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:07,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:07,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70361583] [2022-01-18 15:36:07,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70361583] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:07,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896614995] [2022-01-18 15:36:07,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:07,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:07,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:07,499 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:07,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-01-18 15:36:07,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:07,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:07,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:36:07,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:07,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:07,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:07,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:07,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:08,199 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:08,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:08,810 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:08,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 174 [2022-01-18 15:36:08,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 143 [2022-01-18 15:36:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:08,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896614995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:08,897 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:08,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:36:08,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984870876] [2022-01-18 15:36:08,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:08,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:08,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:08,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:08,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:08,897 INFO L87 Difference]: Start difference. First operand 214 states and 522 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:10,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:10,194 INFO L93 Difference]: Finished difference Result 329 states and 737 transitions. [2022-01-18 15:36:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:36:10,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:10,195 INFO L225 Difference]: With dead ends: 329 [2022-01-18 15:36:10,195 INFO L226 Difference]: Without dead ends: 308 [2022-01-18 15:36:10,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:36:10,195 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:10,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 238 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 748 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-01-18 15:36:10,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-18 15:36:10,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 214. [2022-01-18 15:36:10,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.4507042253521125) internal successors, (522), 213 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:10,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 522 transitions. [2022-01-18 15:36:10,197 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 522 transitions. Word has length 18 [2022-01-18 15:36:10,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:10,197 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 522 transitions. [2022-01-18 15:36:10,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:10,198 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 522 transitions. [2022-01-18 15:36:10,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:10,198 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:10,198 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:10,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-01-18 15:36:10,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable334,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:10,398 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:10,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:10,399 INFO L85 PathProgramCache]: Analyzing trace with hash 526067131, now seen corresponding path program 315 times [2022-01-18 15:36:10,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:10,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084046211] [2022-01-18 15:36:10,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:10,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:10,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084046211] [2022-01-18 15:36:10,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084046211] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974055637] [2022-01-18 15:36:10,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:10,623 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:10,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:10,624 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:10,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-01-18 15:36:10,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:36:10,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:10,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:10,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:10,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:36:10,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:10,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:36:10,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:10,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:11,451 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:11,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:36:11,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:36:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:11,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974055637] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:11,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:11,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:36:11,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855816957] [2022-01-18 15:36:11,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:11,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:11,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:11,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:11,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:11,475 INFO L87 Difference]: Start difference. First operand 214 states and 522 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:12,098 INFO L93 Difference]: Finished difference Result 347 states and 759 transitions. [2022-01-18 15:36:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:36:12,098 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:12,098 INFO L225 Difference]: With dead ends: 347 [2022-01-18 15:36:12,098 INFO L226 Difference]: Without dead ends: 340 [2022-01-18 15:36:12,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:36:12,099 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 97 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 893 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:12,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 307 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 893 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-18 15:36:12,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 219. [2022-01-18 15:36:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.4724770642201834) internal successors, (539), 218 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 539 transitions. [2022-01-18 15:36:12,101 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 539 transitions. Word has length 18 [2022-01-18 15:36:12,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:12,101 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 539 transitions. [2022-01-18 15:36:12,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:12,101 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 539 transitions. [2022-01-18 15:36:12,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:12,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:12,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:12,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-01-18 15:36:12,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:12,302 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:12,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:12,302 INFO L85 PathProgramCache]: Analyzing trace with hash 510606335, now seen corresponding path program 316 times [2022-01-18 15:36:12,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:12,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004834206] [2022-01-18 15:36:12,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:12,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:12,525 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004834206] [2022-01-18 15:36:12,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004834206] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:12,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805381281] [2022-01-18 15:36:12,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:12,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:12,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:12,526 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:12,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-01-18 15:36:12,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:12,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:12,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:12,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:12,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:12,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:36:12,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:12,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:36:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:12,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:13,333 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:13,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:36:13,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:36:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805381281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:13,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:13,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:36:13,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30115151] [2022-01-18 15:36:13,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:13,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:13,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:13,358 INFO L87 Difference]: Start difference. First operand 219 states and 539 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:13,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:13,988 INFO L93 Difference]: Finished difference Result 351 states and 764 transitions. [2022-01-18 15:36:13,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:36:13,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:13,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:13,988 INFO L225 Difference]: With dead ends: 351 [2022-01-18 15:36:13,989 INFO L226 Difference]: Without dead ends: 344 [2022-01-18 15:36:13,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=134, Invalid=988, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:36:13,989 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:13,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 281 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:13,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-18 15:36:13,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 219. [2022-01-18 15:36:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.4724770642201834) internal successors, (539), 218 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 539 transitions. [2022-01-18 15:36:13,991 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 539 transitions. Word has length 18 [2022-01-18 15:36:13,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:13,991 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 539 transitions. [2022-01-18 15:36:13,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 539 transitions. [2022-01-18 15:36:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:13,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:13,992 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:14,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-01-18 15:36:14,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-01-18 15:36:14,192 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:14,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:14,192 INFO L85 PathProgramCache]: Analyzing trace with hash -60848471, now seen corresponding path program 317 times [2022-01-18 15:36:14,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:14,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910876225] [2022-01-18 15:36:14,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:14,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910876225] [2022-01-18 15:36:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910876225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608463338] [2022-01-18 15:36:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:14,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:14,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:14,404 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:14,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-01-18 15:36:14,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:36:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:14,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:14,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 130 treesize of output 110 [2022-01-18 15:36:14,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:14,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 90 [2022-01-18 15:36:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:14,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:15,273 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:15,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:15,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:15,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608463338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:15,297 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:15,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:36:15,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452235797] [2022-01-18 15:36:15,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:15,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:36:15,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:15,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:36:15,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:36:15,297 INFO L87 Difference]: Start difference. First operand 219 states and 539 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:15,942 INFO L93 Difference]: Finished difference Result 333 states and 734 transitions. [2022-01-18 15:36:15,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:36:15,942 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:15,943 INFO L225 Difference]: With dead ends: 333 [2022-01-18 15:36:15,943 INFO L226 Difference]: Without dead ends: 326 [2022-01-18 15:36:15,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:36:15,943 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 90 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:15,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 298 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:15,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-18 15:36:15,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 217. [2022-01-18 15:36:15,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.462962962962963) internal successors, (532), 216 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:15,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 532 transitions. [2022-01-18 15:36:15,946 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 532 transitions. Word has length 18 [2022-01-18 15:36:15,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:15,946 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 532 transitions. [2022-01-18 15:36:15,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:15,946 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 532 transitions. [2022-01-18 15:36:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:15,946 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:15,946 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:15,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:16,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-01-18 15:36:16,147 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:16,147 INFO L85 PathProgramCache]: Analyzing trace with hash -596078273, now seen corresponding path program 318 times [2022-01-18 15:36:16,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:16,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98464227] [2022-01-18 15:36:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:16,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:16,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98464227] [2022-01-18 15:36:16,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98464227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381641173] [2022-01-18 15:36:16,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:16,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:16,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:16,350 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:16,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-01-18 15:36:16,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:36:16,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:16,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:16,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:16,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:16,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:36:16,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:16,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:36:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:16,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:17,296 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:17,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:17,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:17,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381641173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:17,319 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:17,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:36:17,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713584415] [2022-01-18 15:36:17,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:17,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:17,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:17,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:17,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:17,320 INFO L87 Difference]: Start difference. First operand 217 states and 532 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:17,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:17,819 INFO L93 Difference]: Finished difference Result 309 states and 690 transitions. [2022-01-18 15:36:17,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:36:17,819 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:17,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:17,819 INFO L225 Difference]: With dead ends: 309 [2022-01-18 15:36:17,819 INFO L226 Difference]: Without dead ends: 302 [2022-01-18 15:36:17,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:36:17,820 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 63 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:17,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 301 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:36:17,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-18 15:36:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 219. [2022-01-18 15:36:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.463302752293578) internal successors, (537), 218 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 537 transitions. [2022-01-18 15:36:17,822 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 537 transitions. Word has length 18 [2022-01-18 15:36:17,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:17,822 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 537 transitions. [2022-01-18 15:36:17,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:17,822 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 537 transitions. [2022-01-18 15:36:17,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:17,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:17,823 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:17,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-01-18 15:36:18,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-01-18 15:36:18,023 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:18,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:18,023 INFO L85 PathProgramCache]: Analyzing trace with hash 633581265, now seen corresponding path program 319 times [2022-01-18 15:36:18,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:18,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813637373] [2022-01-18 15:36:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:18,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:18,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:18,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813637373] [2022-01-18 15:36:18,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813637373] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:18,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550657612] [2022-01-18 15:36:18,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:18,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:18,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:18,249 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:18,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-01-18 15:36:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:18,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:18,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:36:18,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:18,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:36:18,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:18,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:19,489 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:19,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:36:19,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:36:19,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:19,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550657612] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:19,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:19,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:36:19,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417586488] [2022-01-18 15:36:19,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:19,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:19,509 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:19,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:19,510 INFO L87 Difference]: Start difference. First operand 219 states and 537 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:19,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:19,812 INFO L93 Difference]: Finished difference Result 366 states and 802 transitions. [2022-01-18 15:36:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:36:19,813 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:19,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:19,813 INFO L225 Difference]: With dead ends: 366 [2022-01-18 15:36:19,813 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 15:36:19,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:36:19,813 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 84 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:19,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 394 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 676 Invalid, 0 Unknown, 190 Unchecked, 0.3s Time] [2022-01-18 15:36:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 15:36:19,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 235. [2022-01-18 15:36:19,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.5128205128205128) internal successors, (588), 234 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:19,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 588 transitions. [2022-01-18 15:36:19,816 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 588 transitions. Word has length 18 [2022-01-18 15:36:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:19,816 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 588 transitions. [2022-01-18 15:36:19,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 588 transitions. [2022-01-18 15:36:19,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:19,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:19,817 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:19,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-01-18 15:36:20,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:20,017 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:20,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash -386988595, now seen corresponding path program 320 times [2022-01-18 15:36:20,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:20,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347945011] [2022-01-18 15:36:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:20,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:20,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347945011] [2022-01-18 15:36:20,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347945011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:20,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7832512] [2022-01-18 15:36:20,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:20,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:20,209 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:20,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-01-18 15:36:20,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:20,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:20,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:20,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:20,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:20,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:36:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:20,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:36:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:20,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:21,556 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:21,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:36:21,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:36:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:21,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7832512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:21,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:21,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:36:21,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915314993] [2022-01-18 15:36:21,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:21,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:21,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:21,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:21,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:21,577 INFO L87 Difference]: Start difference. First operand 235 states and 588 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:22,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:22,096 INFO L93 Difference]: Finished difference Result 368 states and 827 transitions. [2022-01-18 15:36:22,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:36:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:22,097 INFO L225 Difference]: With dead ends: 368 [2022-01-18 15:36:22,097 INFO L226 Difference]: Without dead ends: 354 [2022-01-18 15:36:22,097 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:36:22,097 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 75 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:22,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 477 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 594 Invalid, 0 Unknown, 123 Unchecked, 0.2s Time] [2022-01-18 15:36:22,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-18 15:36:22,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 248. [2022-01-18 15:36:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.522267206477733) internal successors, (623), 247 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:22,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 623 transitions. [2022-01-18 15:36:22,100 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 623 transitions. Word has length 18 [2022-01-18 15:36:22,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:22,100 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 623 transitions. [2022-01-18 15:36:22,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:22,100 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 623 transitions. [2022-01-18 15:36:22,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:22,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:22,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:22,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:22,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:22,301 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash -215093351, now seen corresponding path program 321 times [2022-01-18 15:36:22,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:22,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251636522] [2022-01-18 15:36:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:22,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:22,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251636522] [2022-01-18 15:36:22,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251636522] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:22,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943255383] [2022-01-18 15:36:22,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:22,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:22,491 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:22,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-01-18 15:36:22,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:36:22,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:22,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:22,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:23,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:36:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:23,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:36:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:23,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:23,732 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:23,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:23,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:23,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943255383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:23,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:23,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:36:23,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766158478] [2022-01-18 15:36:23,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:23,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:23,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:23,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:23,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:23,752 INFO L87 Difference]: Start difference. First operand 248 states and 623 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:24,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:24,294 INFO L93 Difference]: Finished difference Result 376 states and 826 transitions. [2022-01-18 15:36:24,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:36:24,294 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:24,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:24,295 INFO L225 Difference]: With dead ends: 376 [2022-01-18 15:36:24,295 INFO L226 Difference]: Without dead ends: 370 [2022-01-18 15:36:24,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:36:24,295 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:24,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 448 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 712 Invalid, 0 Unknown, 160 Unchecked, 0.3s Time] [2022-01-18 15:36:24,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-18 15:36:24,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 238. [2022-01-18 15:36:24,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5274261603375527) internal successors, (599), 237 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:24,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 599 transitions. [2022-01-18 15:36:24,298 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 599 transitions. Word has length 18 [2022-01-18 15:36:24,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:24,298 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 599 transitions. [2022-01-18 15:36:24,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:24,298 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 599 transitions. [2022-01-18 15:36:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:24,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:24,298 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:24,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Ended with exit code 0 [2022-01-18 15:36:24,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:24,499 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash -4268207, now seen corresponding path program 322 times [2022-01-18 15:36:24,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:24,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171113026] [2022-01-18 15:36:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:24,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:24,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171113026] [2022-01-18 15:36:24,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171113026] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:24,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685207279] [2022-01-18 15:36:24,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:24,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:24,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:24,719 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:24,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-01-18 15:36:24,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:24,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:25,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:25,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:36:25,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:25,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:36:25,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:25,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:25,928 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:25,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:25,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:25,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685207279] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:25,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:25,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:36:25,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145774303] [2022-01-18 15:36:25,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:25,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:25,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:25,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:25,950 INFO L87 Difference]: Start difference. First operand 238 states and 599 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:26,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:26,579 INFO L93 Difference]: Finished difference Result 399 states and 874 transitions. [2022-01-18 15:36:26,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:36:26,579 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:26,580 INFO L225 Difference]: With dead ends: 399 [2022-01-18 15:36:26,580 INFO L226 Difference]: Without dead ends: 385 [2022-01-18 15:36:26,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1060, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:36:26,580 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 79 mSDsluCounter, 804 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:26,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 503 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 882 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-01-18 15:36:26,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-18 15:36:26,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 243. [2022-01-18 15:36:26,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.541322314049587) internal successors, (615), 242 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:26,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 615 transitions. [2022-01-18 15:36:26,583 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 615 transitions. Word has length 18 [2022-01-18 15:36:26,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:26,583 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 615 transitions. [2022-01-18 15:36:26,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 615 transitions. [2022-01-18 15:36:26,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:26,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:26,583 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:26,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:26,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-01-18 15:36:26,784 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:26,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 167627037, now seen corresponding path program 323 times [2022-01-18 15:36:26,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:26,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521692403] [2022-01-18 15:36:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:26,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:26,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:27,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521692403] [2022-01-18 15:36:27,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521692403] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:27,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843480330] [2022-01-18 15:36:27,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:27,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:27,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:27,001 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:27,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-01-18 15:36:27,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:36:27,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:27,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:27,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:27,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:27,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:36:27,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:27,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:36:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:27,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:28,279 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:28,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:36:28,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:36:28,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:28,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843480330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:28,299 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:28,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:36:28,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971578092] [2022-01-18 15:36:28,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:28,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:36:28,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:28,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:36:28,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:28,300 INFO L87 Difference]: Start difference. First operand 243 states and 615 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:28,882 INFO L93 Difference]: Finished difference Result 351 states and 793 transitions. [2022-01-18 15:36:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:36:28,883 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:28,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:28,883 INFO L225 Difference]: With dead ends: 351 [2022-01-18 15:36:28,883 INFO L226 Difference]: Without dead ends: 348 [2022-01-18 15:36:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=1002, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:36:28,883 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 61 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:28,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 399 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 739 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-01-18 15:36:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-18 15:36:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 240. [2022-01-18 15:36:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.5355648535564854) internal successors, (606), 239 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 606 transitions. [2022-01-18 15:36:28,886 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 606 transitions. Word has length 18 [2022-01-18 15:36:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 606 transitions. [2022-01-18 15:36:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 606 transitions. [2022-01-18 15:36:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:28,886 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:28,886 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:28,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-01-18 15:36:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable343,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:29,087 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1116456269, now seen corresponding path program 324 times [2022-01-18 15:36:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:29,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613883974] [2022-01-18 15:36:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:29,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:29,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:29,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:29,303 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:29,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613883974] [2022-01-18 15:36:29,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613883974] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:29,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190687319] [2022-01-18 15:36:29,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:29,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:29,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:29,304 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:29,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-01-18 15:36:29,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:36:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:29,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:29,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:29,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:29,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:29,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:29,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:30,335 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:30,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:36:30,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:36:30,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:30,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190687319] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:30,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:30,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:36:30,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432057641] [2022-01-18 15:36:30,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:30,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:36:30,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:36:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:36:30,355 INFO L87 Difference]: Start difference. First operand 240 states and 606 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:30,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:30,955 INFO L93 Difference]: Finished difference Result 373 states and 827 transitions. [2022-01-18 15:36:30,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:36:30,956 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:30,956 INFO L225 Difference]: With dead ends: 373 [2022-01-18 15:36:30,956 INFO L226 Difference]: Without dead ends: 359 [2022-01-18 15:36:30,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=989, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:36:30,957 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 86 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:30,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 401 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 826 Invalid, 0 Unknown, 132 Unchecked, 0.3s Time] [2022-01-18 15:36:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-18 15:36:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 240. [2022-01-18 15:36:30,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.5355648535564854) internal successors, (606), 239 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 606 transitions. [2022-01-18 15:36:30,959 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 606 transitions. Word has length 18 [2022-01-18 15:36:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:30,960 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 606 transitions. [2022-01-18 15:36:30,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 606 transitions. [2022-01-18 15:36:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:30,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:30,960 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:30,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-01-18 15:36:31,160 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:31,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1100995473, now seen corresponding path program 325 times [2022-01-18 15:36:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150049107] [2022-01-18 15:36:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:31,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:31,361 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:31,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:31,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150049107] [2022-01-18 15:36:31,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150049107] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:31,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006834302] [2022-01-18 15:36:31,362 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:31,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:31,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:31,362 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:31,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-01-18 15:36:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:31,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:31,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:31,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:31,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:31,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:32,522 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:32,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:32,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:32,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006834302] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:32,544 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:32,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:36:32,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504574966] [2022-01-18 15:36:32,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:32,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:36:32,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:32,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:36:32,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:36:32,544 INFO L87 Difference]: Start difference. First operand 240 states and 606 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:33,003 INFO L93 Difference]: Finished difference Result 371 states and 824 transitions. [2022-01-18 15:36:33,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:36:33,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:33,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:33,004 INFO L225 Difference]: With dead ends: 371 [2022-01-18 15:36:33,004 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 15:36:33,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:36:33,004 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 69 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:33,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 413 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 684 Invalid, 0 Unknown, 178 Unchecked, 0.3s Time] [2022-01-18 15:36:33,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 15:36:33,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 235. [2022-01-18 15:36:33,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.517094017094017) internal successors, (589), 234 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 589 transitions. [2022-01-18 15:36:33,007 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 589 transitions. Word has length 18 [2022-01-18 15:36:33,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:33,007 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 589 transitions. [2022-01-18 15:36:33,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,007 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 589 transitions. [2022-01-18 15:36:33,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:33,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:33,007 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:33,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-01-18 15:36:33,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-01-18 15:36:33,208 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:33,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:33,208 INFO L85 PathProgramCache]: Analyzing trace with hash -153884597, now seen corresponding path program 326 times [2022-01-18 15:36:33,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:33,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905214917] [2022-01-18 15:36:33,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:33,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:33,328 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:33,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905214917] [2022-01-18 15:36:33,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905214917] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:33,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947285541] [2022-01-18 15:36:33,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:33,328 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:33,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:33,329 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:33,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-01-18 15:36:33,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:33,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:33,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:36:33,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:33,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:36:33,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:36:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:33,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:33,659 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:33,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:36:33,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:36:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:33,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947285541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:33,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:33,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:36:33,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611247445] [2022-01-18 15:36:33,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:33,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:33,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:33,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:33,692 INFO L87 Difference]: Start difference. First operand 235 states and 589 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:33,949 INFO L93 Difference]: Finished difference Result 288 states and 687 transitions. [2022-01-18 15:36:33,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:36:33,950 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:33,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:33,950 INFO L225 Difference]: With dead ends: 288 [2022-01-18 15:36:33,950 INFO L226 Difference]: Without dead ends: 288 [2022-01-18 15:36:33,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:36:33,950 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:33,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 117 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 340 Invalid, 0 Unknown, 5 Unchecked, 0.1s Time] [2022-01-18 15:36:33,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-18 15:36:33,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 236. [2022-01-18 15:36:33,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.502127659574468) internal successors, (588), 235 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 588 transitions. [2022-01-18 15:36:33,953 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 588 transitions. Word has length 18 [2022-01-18 15:36:33,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:33,953 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 588 transitions. [2022-01-18 15:36:33,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 588 transitions. [2022-01-18 15:36:33,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:33,954 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:33,954 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:33,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Ended with exit code 0 [2022-01-18 15:36:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-01-18 15:36:34,154 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash 2042551035, now seen corresponding path program 327 times [2022-01-18 15:36:34,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87892266] [2022-01-18 15:36:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:34,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:34,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:34,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87892266] [2022-01-18 15:36:34,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87892266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:34,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326907234] [2022-01-18 15:36:34,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:34,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:34,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:34,272 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:34,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-01-18 15:36:34,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:36:34,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:34,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:36:34,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:34,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:36:34,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:36:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:34,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:34,611 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:34,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:36:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:36:34,647 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:34,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326907234] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:34,647 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:34,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:36:34,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143447593] [2022-01-18 15:36:34,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:34,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:36:34,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:34,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:36:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:36:34,648 INFO L87 Difference]: Start difference. First operand 236 states and 588 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:35,004 INFO L93 Difference]: Finished difference Result 335 states and 780 transitions. [2022-01-18 15:36:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:36:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:35,005 INFO L225 Difference]: With dead ends: 335 [2022-01-18 15:36:35,005 INFO L226 Difference]: Without dead ends: 335 [2022-01-18 15:36:35,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=1054, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:36:35,005 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:35,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 111 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 70 Unchecked, 0.1s Time] [2022-01-18 15:36:35,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-18 15:36:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 229. [2022-01-18 15:36:35,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.5) internal successors, (570), 228 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:35,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 570 transitions. [2022-01-18 15:36:35,008 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 570 transitions. Word has length 18 [2022-01-18 15:36:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:35,008 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 570 transitions. [2022-01-18 15:36:35,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:35,008 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 570 transitions. [2022-01-18 15:36:35,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:35,008 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:35,008 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:35,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-01-18 15:36:35,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:35,209 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:35,209 INFO L85 PathProgramCache]: Analyzing trace with hash -227701947, now seen corresponding path program 328 times [2022-01-18 15:36:35,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:35,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580608836] [2022-01-18 15:36:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:35,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:35,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580608836] [2022-01-18 15:36:35,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580608836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:35,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738489458] [2022-01-18 15:36:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:35,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:35,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:35,387 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:35,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-01-18 15:36:35,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:35,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:35,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:35,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:35,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:35,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:35,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:35,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:35,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:36,407 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:36,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:36:36,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:36:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:36,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738489458] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:36,430 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:36,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:36:36,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037277868] [2022-01-18 15:36:36,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:36,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:36:36,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:36,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:36:36,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:36,430 INFO L87 Difference]: Start difference. First operand 229 states and 570 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:36,858 INFO L93 Difference]: Finished difference Result 255 states and 619 transitions. [2022-01-18 15:36:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:36:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:36,858 INFO L225 Difference]: With dead ends: 255 [2022-01-18 15:36:36,858 INFO L226 Difference]: Without dead ends: 248 [2022-01-18 15:36:36,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:36:36,859 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:36,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 134 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 420 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-18 15:36:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-18 15:36:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 226. [2022-01-18 15:36:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.4844444444444442) internal successors, (559), 225 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 559 transitions. [2022-01-18 15:36:36,861 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 559 transitions. Word has length 18 [2022-01-18 15:36:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:36,861 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 559 transitions. [2022-01-18 15:36:36,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 559 transitions. [2022-01-18 15:36:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:36,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:36,862 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:36,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:37,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:37,062 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:37,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:37,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1228566783, now seen corresponding path program 329 times [2022-01-18 15:36:37,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:37,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100164761] [2022-01-18 15:36:37,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:37,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:37,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100164761] [2022-01-18 15:36:37,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100164761] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:37,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793839063] [2022-01-18 15:36:37,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:37,240 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:37,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:37,241 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:37,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-01-18 15:36:37,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:36:37,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:37,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:37,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:37,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:37,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 101 [2022-01-18 15:36:37,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:37,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2022-01-18 15:36:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:37,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:38,337 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:38,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:38,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:38,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793839063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:38,361 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:38,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:36:38,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020967161] [2022-01-18 15:36:38,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:38,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:38,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:38,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:38,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:38,361 INFO L87 Difference]: Start difference. First operand 226 states and 559 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:38,655 INFO L93 Difference]: Finished difference Result 334 states and 760 transitions. [2022-01-18 15:36:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:36:38,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:38,656 INFO L225 Difference]: With dead ends: 334 [2022-01-18 15:36:38,656 INFO L226 Difference]: Without dead ends: 327 [2022-01-18 15:36:38,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:36:38,656 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:38,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 305 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 638 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2022-01-18 15:36:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-18 15:36:38,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 239. [2022-01-18 15:36:38,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.533613445378151) internal successors, (603), 238 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:38,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 603 transitions. [2022-01-18 15:36:38,659 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 603 transitions. Word has length 18 [2022-01-18 15:36:38,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:38,659 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 603 transitions. [2022-01-18 15:36:38,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:38,659 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 603 transitions. [2022-01-18 15:36:38,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:38,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:38,660 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:38,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-01-18 15:36:38,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:38,860 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash -845846395, now seen corresponding path program 330 times [2022-01-18 15:36:38,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:38,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073209736] [2022-01-18 15:36:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:38,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:39,048 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:39,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073209736] [2022-01-18 15:36:39,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073209736] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:39,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792464366] [2022-01-18 15:36:39,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:39,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:39,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:39,049 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:39,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-01-18 15:36:39,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:36:39,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:39,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:39,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:39,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:39,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:36:39,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:39,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:36:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:39,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:40,134 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:40,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:36:40,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:36:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:40,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792464366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:40,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:40,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-01-18 15:36:40,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146438976] [2022-01-18 15:36:40,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:40,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:36:40,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:36:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:36:40,157 INFO L87 Difference]: Start difference. First operand 239 states and 603 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:40,632 INFO L93 Difference]: Finished difference Result 354 states and 798 transitions. [2022-01-18 15:36:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:36:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:40,632 INFO L225 Difference]: With dead ends: 354 [2022-01-18 15:36:40,633 INFO L226 Difference]: Without dead ends: 347 [2022-01-18 15:36:40,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:36:40,633 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:40,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 323 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 709 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-01-18 15:36:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-18 15:36:40,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 241. [2022-01-18 15:36:40,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.5416666666666665) internal successors, (610), 240 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:40,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 610 transitions. [2022-01-18 15:36:40,636 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 610 transitions. Word has length 18 [2022-01-18 15:36:40,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:40,636 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 610 transitions. [2022-01-18 15:36:40,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:40,636 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 610 transitions. [2022-01-18 15:36:40,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:40,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:40,636 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:40,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:40,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:40,836 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:40,837 INFO L85 PathProgramCache]: Analyzing trace with hash 274878081, now seen corresponding path program 331 times [2022-01-18 15:36:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:40,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943722345] [2022-01-18 15:36:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:40,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:41,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:41,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943722345] [2022-01-18 15:36:41,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943722345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:41,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246432522] [2022-01-18 15:36:41,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:41,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:41,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:41,136 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:41,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-01-18 15:36:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:41,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:41,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:36:41,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:41,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:36:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:41,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:42,198 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:42,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:36:42,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:36:42,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:42,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246432522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:42,274 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:42,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:36:42,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040240430] [2022-01-18 15:36:42,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:42,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:36:42,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:42,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:36:42,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:36:42,275 INFO L87 Difference]: Start difference. First operand 241 states and 610 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:43,146 INFO L93 Difference]: Finished difference Result 343 states and 780 transitions. [2022-01-18 15:36:43,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:36:43,146 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:43,147 INFO L225 Difference]: With dead ends: 343 [2022-01-18 15:36:43,147 INFO L226 Difference]: Without dead ends: 326 [2022-01-18 15:36:43,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=151, Invalid=1331, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:36:43,147 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:43,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 312 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 673 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-01-18 15:36:43,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-01-18 15:36:43,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 246. [2022-01-18 15:36:43,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.5428571428571427) internal successors, (623), 245 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 623 transitions. [2022-01-18 15:36:43,150 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 623 transitions. Word has length 18 [2022-01-18 15:36:43,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:43,150 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 623 transitions. [2022-01-18 15:36:43,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:43,150 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 623 transitions. [2022-01-18 15:36:43,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:43,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:43,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:43,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:43,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:43,351 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:43,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:43,351 INFO L85 PathProgramCache]: Analyzing trace with hash 259417285, now seen corresponding path program 332 times [2022-01-18 15:36:43,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:43,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978762932] [2022-01-18 15:36:43,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:43,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:43,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:43,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978762932] [2022-01-18 15:36:43,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978762932] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:43,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300940416] [2022-01-18 15:36:43,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:43,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:43,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:43,549 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:43,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-01-18 15:36:43,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:43,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:43,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:43,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:43,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:43,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:43,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:44,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:44,577 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:36:44,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:36:44,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:36:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:44,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300940416] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:44,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:44,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-01-18 15:36:44,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317820743] [2022-01-18 15:36:44,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:44,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:36:44,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:44,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:36:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:36:44,602 INFO L87 Difference]: Start difference. First operand 246 states and 623 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:45,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:45,224 INFO L93 Difference]: Finished difference Result 343 states and 784 transitions. [2022-01-18 15:36:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:36:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:45,225 INFO L225 Difference]: With dead ends: 343 [2022-01-18 15:36:45,225 INFO L226 Difference]: Without dead ends: 336 [2022-01-18 15:36:45,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:36:45,225 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:45,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 271 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 736 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-01-18 15:36:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-18 15:36:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 240. [2022-01-18 15:36:45,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.5230125523012554) internal successors, (603), 239 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 603 transitions. [2022-01-18 15:36:45,228 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 603 transitions. Word has length 18 [2022-01-18 15:36:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:45,228 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 603 transitions. [2022-01-18 15:36:45,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 603 transitions. [2022-01-18 15:36:45,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:45,228 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:45,228 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:45,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-01-18 15:36:45,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:45,429 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:45,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:45,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1427183407, now seen corresponding path program 333 times [2022-01-18 15:36:45,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:45,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685902831] [2022-01-18 15:36:45,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:45,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:45,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:45,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:45,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685902831] [2022-01-18 15:36:45,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685902831] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:45,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76091818] [2022-01-18 15:36:45,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:45,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:45,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:45,577 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:45,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-01-18 15:36:45,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:36:45,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:45,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:36:45,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:45,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:45,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:36:45,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:45,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:36:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:46,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:46,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:46,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:36:46,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:36:46,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:46,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76091818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:46,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:46,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 22 [2022-01-18 15:36:46,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638354854] [2022-01-18 15:36:46,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:46,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:36:46,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:46,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:36:46,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:46,958 INFO L87 Difference]: Start difference. First operand 240 states and 603 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:47,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:47,348 INFO L93 Difference]: Finished difference Result 342 states and 799 transitions. [2022-01-18 15:36:47,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:36:47,348 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:47,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:47,348 INFO L225 Difference]: With dead ends: 342 [2022-01-18 15:36:47,348 INFO L226 Difference]: Without dead ends: 328 [2022-01-18 15:36:47,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:36:47,349 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 42 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:47,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 370 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 770 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-18 15:36:47,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-18 15:36:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 253. [2022-01-18 15:36:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.5634920634920637) internal successors, (646), 252 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:47,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 646 transitions. [2022-01-18 15:36:47,352 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 646 transitions. Word has length 18 [2022-01-18 15:36:47,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:47,352 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 646 transitions. [2022-01-18 15:36:47,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:47,352 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 646 transitions. [2022-01-18 15:36:47,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:47,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:47,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:47,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Ended with exit code 0 [2022-01-18 15:36:47,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:47,552 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:47,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:47,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1255288163, now seen corresponding path program 334 times [2022-01-18 15:36:47,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:47,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610503857] [2022-01-18 15:36:47,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:47,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:47,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:47,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610503857] [2022-01-18 15:36:47,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610503857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:47,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640578236] [2022-01-18 15:36:47,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:47,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:47,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:47,708 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:47,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-01-18 15:36:47,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:47,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:47,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:47,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:48,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:48,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:36:48,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:48,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:36:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:48,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:48,778 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:48,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:36:48,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:36:48,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:48,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640578236] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:48,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:48,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 21 [2022-01-18 15:36:48,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551983264] [2022-01-18 15:36:48,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:48,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:36:48,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:36:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:36:48,802 INFO L87 Difference]: Start difference. First operand 253 states and 646 transitions. Second operand has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:49,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:49,093 INFO L93 Difference]: Finished difference Result 337 states and 784 transitions. [2022-01-18 15:36:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:36:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:49,094 INFO L225 Difference]: With dead ends: 337 [2022-01-18 15:36:49,094 INFO L226 Difference]: Without dead ends: 334 [2022-01-18 15:36:49,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:49,094 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 48 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:49,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 260 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 546 Invalid, 0 Unknown, 116 Unchecked, 0.2s Time] [2022-01-18 15:36:49,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-18 15:36:49,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 253. [2022-01-18 15:36:49,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.5634920634920637) internal successors, (646), 252 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:49,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 646 transitions. [2022-01-18 15:36:49,097 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 646 transitions. Word has length 18 [2022-01-18 15:36:49,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:49,097 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 646 transitions. [2022-01-18 15:36:49,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7619047619047619) internal successors, (37), 21 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:49,097 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 646 transitions. [2022-01-18 15:36:49,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:49,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:49,097 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:49,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:49,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-01-18 15:36:49,298 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:49,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:49,298 INFO L85 PathProgramCache]: Analyzing trace with hash -306458931, now seen corresponding path program 335 times [2022-01-18 15:36:49,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:49,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545944754] [2022-01-18 15:36:49,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:49,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:49,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545944754] [2022-01-18 15:36:49,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545944754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:49,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507321111] [2022-01-18 15:36:49,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:36:49,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:49,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:49,428 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:49,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-01-18 15:36:49,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:36:49,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:49,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:49,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:49,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:49,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:49,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:49,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:50,223 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:50,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 104 [2022-01-18 15:36:50,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 15:36:50,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507321111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:50,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:50,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:36:50,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740178169] [2022-01-18 15:36:50,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:50,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:50,250 INFO L87 Difference]: Start difference. First operand 253 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:50,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:50,510 INFO L93 Difference]: Finished difference Result 336 states and 786 transitions. [2022-01-18 15:36:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:36:50,511 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:50,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:50,511 INFO L225 Difference]: With dead ends: 336 [2022-01-18 15:36:50,511 INFO L226 Difference]: Without dead ends: 329 [2022-01-18 15:36:50,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:50,511 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 52 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:50,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 217 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-18 15:36:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-18 15:36:50,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 253. [2022-01-18 15:36:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.5634920634920637) internal successors, (646), 252 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 646 transitions. [2022-01-18 15:36:50,514 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 646 transitions. Word has length 18 [2022-01-18 15:36:50,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:50,514 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 646 transitions. [2022-01-18 15:36:50,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 646 transitions. [2022-01-18 15:36:50,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:50,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:50,515 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:50,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-01-18 15:36:50,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-01-18 15:36:50,715 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:50,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:50,715 INFO L85 PathProgramCache]: Analyzing trace with hash -321919727, now seen corresponding path program 336 times [2022-01-18 15:36:50,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:50,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108170841] [2022-01-18 15:36:50,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:50,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:50,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:50,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:50,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:50,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108170841] [2022-01-18 15:36:50,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108170841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:50,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309299213] [2022-01-18 15:36:50,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:36:50,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:50,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:50,920 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:50,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-01-18 15:36:50,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:36:50,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:50,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:50,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:51,142 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:51,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:36:51,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:51,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:36:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:51,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:51,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:51,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:36:51,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:36:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:51,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309299213] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:51,736 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:51,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:36:51,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052998833] [2022-01-18 15:36:51,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:51,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:51,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:51,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:51,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:51,737 INFO L87 Difference]: Start difference. First operand 253 states and 646 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:52,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:52,095 INFO L93 Difference]: Finished difference Result 342 states and 796 transitions. [2022-01-18 15:36:52,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:36:52,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:52,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:52,096 INFO L225 Difference]: With dead ends: 342 [2022-01-18 15:36:52,096 INFO L226 Difference]: Without dead ends: 335 [2022-01-18 15:36:52,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:52,096 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:52,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 258 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 671 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-01-18 15:36:52,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-18 15:36:52,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 251. [2022-01-18 15:36:52,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.556) internal successors, (639), 250 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:52,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 639 transitions. [2022-01-18 15:36:52,099 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 639 transitions. Word has length 18 [2022-01-18 15:36:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:52,099 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 639 transitions. [2022-01-18 15:36:52,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 639 transitions. [2022-01-18 15:36:52,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:52,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:52,100 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:52,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-01-18 15:36:52,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-01-18 15:36:52,300 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 769252225, now seen corresponding path program 337 times [2022-01-18 15:36:52,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:52,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586976025] [2022-01-18 15:36:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:52,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:52,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:52,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586976025] [2022-01-18 15:36:52,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586976025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784399223] [2022-01-18 15:36:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:36:52,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:52,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:52,445 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:52,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-01-18 15:36:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:52,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:52,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:52,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:36:52,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:52,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:36:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:52,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:53,241 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:53,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:36:53,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:36:53,267 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:53,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784399223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:53,267 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:53,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:36:53,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044240740] [2022-01-18 15:36:53,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:53,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:36:53,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:53,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:36:53,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:36:53,268 INFO L87 Difference]: Start difference. First operand 251 states and 639 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:53,648 INFO L93 Difference]: Finished difference Result 348 states and 801 transitions. [2022-01-18 15:36:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:36:53,648 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:53,648 INFO L225 Difference]: With dead ends: 348 [2022-01-18 15:36:53,648 INFO L226 Difference]: Without dead ends: 341 [2022-01-18 15:36:53,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:36:53,649 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 80 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:53,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 152 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:36:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-18 15:36:53,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 253. [2022-01-18 15:36:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.5674603174603177) internal successors, (647), 252 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 647 transitions. [2022-01-18 15:36:53,652 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 647 transitions. Word has length 18 [2022-01-18 15:36:53,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:53,652 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 647 transitions. [2022-01-18 15:36:53,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:53,652 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 647 transitions. [2022-01-18 15:36:53,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:53,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:53,652 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:53,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-01-18 15:36:53,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:53,852 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 753791429, now seen corresponding path program 338 times [2022-01-18 15:36:53,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:53,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854941923] [2022-01-18 15:36:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:53,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:53,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:54,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854941923] [2022-01-18 15:36:54,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854941923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:54,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140957381] [2022-01-18 15:36:54,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:36:54,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:54,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:54,005 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:54,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-01-18 15:36:54,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:36:54,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:36:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:54,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:54,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:36:54,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:54,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:36:54,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:54,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:55,274 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:55,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 175 treesize of output 154 [2022-01-18 15:36:55,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 127 [2022-01-18 15:36:55,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:55,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140957381] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:55,374 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:55,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 22 [2022-01-18 15:36:55,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104525513] [2022-01-18 15:36:55,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:55,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:36:55,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:55,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:36:55,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:36:55,375 INFO L87 Difference]: Start difference. First operand 253 states and 647 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:56,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:56,774 INFO L93 Difference]: Finished difference Result 444 states and 948 transitions. [2022-01-18 15:36:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:36:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:56,775 INFO L225 Difference]: With dead ends: 444 [2022-01-18 15:36:56,775 INFO L226 Difference]: Without dead ends: 416 [2022-01-18 15:36:56,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=175, Invalid=1085, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:36:56,775 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 132 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:56,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 334 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:36:56,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-18 15:36:56,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 255. [2022-01-18 15:36:56,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.578740157480315) internal successors, (655), 254 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:56,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 655 transitions. [2022-01-18 15:36:56,778 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 655 transitions. Word has length 18 [2022-01-18 15:36:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:56,778 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 655 transitions. [2022-01-18 15:36:56,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 655 transitions. [2022-01-18 15:36:56,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:56,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:56,779 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:56,794 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Ended with exit code 0 [2022-01-18 15:36:56,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2022-01-18 15:36:56,979 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:56,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:56,979 INFO L85 PathProgramCache]: Analyzing trace with hash 182336623, now seen corresponding path program 339 times [2022-01-18 15:36:56,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:56,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148434015] [2022-01-18 15:36:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:56,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:57,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:57,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148434015] [2022-01-18 15:36:57,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148434015] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:57,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271297643] [2022-01-18 15:36:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:36:57,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:57,186 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:57,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-01-18 15:36:57,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:36:57,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:57,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:36:57,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:36:57,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:57,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:36:57,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:36:57,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:36:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:57,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:36:58,555 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:36:58,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:36:58,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:36:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:36:58,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271297643] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:36:58,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:36:58,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 23 [2022-01-18 15:36:58,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922315099] [2022-01-18 15:36:58,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:36:58,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:36:58,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:36:58,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:36:58,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:36:58,582 INFO L87 Difference]: Start difference. First operand 255 states and 655 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:59,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:36:59,402 INFO L93 Difference]: Finished difference Result 357 states and 834 transitions. [2022-01-18 15:36:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:36:59,403 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:36:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:36:59,403 INFO L225 Difference]: With dead ends: 357 [2022-01-18 15:36:59,403 INFO L226 Difference]: Without dead ends: 343 [2022-01-18 15:36:59,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=1170, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:36:59,404 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:36:59,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 217 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 584 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-01-18 15:36:59,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-18 15:36:59,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 255. [2022-01-18 15:36:59,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.578740157480315) internal successors, (655), 254 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:59,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 655 transitions. [2022-01-18 15:36:59,406 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 655 transitions. Word has length 18 [2022-01-18 15:36:59,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:36:59,407 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 655 transitions. [2022-01-18 15:36:59,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:36:59,407 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 655 transitions. [2022-01-18 15:36:59,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:36:59,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:36:59,407 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:36:59,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-01-18 15:36:59,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable359 [2022-01-18 15:36:59,608 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:36:59,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:36:59,608 INFO L85 PathProgramCache]: Analyzing trace with hash -243440307, now seen corresponding path program 340 times [2022-01-18 15:36:59,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:36:59,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726785314] [2022-01-18 15:36:59,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:36:59,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:36:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:36:59,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:36:59,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:36:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726785314] [2022-01-18 15:36:59,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726785314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:36:59,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565530000] [2022-01-18 15:36:59,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:36:59,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:36:59,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:36:59,864 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:36:59,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-01-18 15:36:59,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:36:59,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:36:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:36:59,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:00,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:00,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:37:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:00,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:37:00,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:00,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:00,869 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:00,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:00,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:00,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565530000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:00,945 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:00,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:37:00,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887055217] [2022-01-18 15:37:00,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:00,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:37:00,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:00,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:37:00,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:00,945 INFO L87 Difference]: Start difference. First operand 255 states and 655 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:01,781 INFO L93 Difference]: Finished difference Result 346 states and 805 transitions. [2022-01-18 15:37:01,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:37:01,781 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:01,781 INFO L225 Difference]: With dead ends: 346 [2022-01-18 15:37:01,781 INFO L226 Difference]: Without dead ends: 332 [2022-01-18 15:37:01,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:37:01,782 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:01,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 258 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 571 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-01-18 15:37:01,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-18 15:37:01,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 255. [2022-01-18 15:37:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.578740157480315) internal successors, (655), 254 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 655 transitions. [2022-01-18 15:37:01,786 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 655 transitions. Word has length 18 [2022-01-18 15:37:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:01,786 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 655 transitions. [2022-01-18 15:37:01,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 655 transitions. [2022-01-18 15:37:01,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:01,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:01,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:01,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:01,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:01,987 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:01,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:01,987 INFO L85 PathProgramCache]: Analyzing trace with hash -258901103, now seen corresponding path program 341 times [2022-01-18 15:37:01,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:01,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403620615] [2022-01-18 15:37:01,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:01,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:02,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:02,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403620615] [2022-01-18 15:37:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403620615] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:02,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034365602] [2022-01-18 15:37:02,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:37:02,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:02,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:02,263 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:02,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-01-18 15:37:02,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:37:02,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:02,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:02,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:02,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:02,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:37:02,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:02,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:37:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:02,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:03,248 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:03,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:37:03,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:37:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:03,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034365602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:03,323 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:03,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:37:03,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543411161] [2022-01-18 15:37:03,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:03,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:37:03,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:03,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:37:03,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:03,324 INFO L87 Difference]: Start difference. First operand 255 states and 655 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:04,131 INFO L93 Difference]: Finished difference Result 324 states and 769 transitions. [2022-01-18 15:37:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:37:04,131 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:04,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:04,132 INFO L225 Difference]: With dead ends: 324 [2022-01-18 15:37:04,132 INFO L226 Difference]: Without dead ends: 310 [2022-01-18 15:37:04,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1535, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:37:04,132 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 53 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:04,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 218 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 633 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:37:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-01-18 15:37:04,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 255. [2022-01-18 15:37:04,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.578740157480315) internal successors, (655), 254 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:04,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 655 transitions. [2022-01-18 15:37:04,135 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 655 transitions. Word has length 18 [2022-01-18 15:37:04,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:04,135 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 655 transitions. [2022-01-18 15:37:04,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:04,135 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 655 transitions. [2022-01-18 15:37:04,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:04,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:04,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:04,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:04,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:04,336 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:04,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -830355909, now seen corresponding path program 342 times [2022-01-18 15:37:04,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:04,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512506637] [2022-01-18 15:37:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:04,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:04,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512506637] [2022-01-18 15:37:04,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512506637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:04,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707174128] [2022-01-18 15:37:04,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:37:04,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:04,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:04,493 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:04,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-01-18 15:37:04,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:37:04,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:04,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:04,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:04,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:04,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:04,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:04,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:05,442 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:05,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:37:05,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:37:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:05,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707174128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:05,465 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:05,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:37:05,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519431738] [2022-01-18 15:37:05,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:05,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:05,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:05,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:05,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:05,465 INFO L87 Difference]: Start difference. First operand 255 states and 655 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:06,072 INFO L93 Difference]: Finished difference Result 345 states and 795 transitions. [2022-01-18 15:37:06,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:37:06,072 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:06,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:06,072 INFO L225 Difference]: With dead ends: 345 [2022-01-18 15:37:06,073 INFO L226 Difference]: Without dead ends: 338 [2022-01-18 15:37:06,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:37:06,073 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 87 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:06,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 240 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-01-18 15:37:06,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 255. [2022-01-18 15:37:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.578740157480315) internal successors, (655), 254 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 655 transitions. [2022-01-18 15:37:06,076 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 655 transitions. Word has length 18 [2022-01-18 15:37:06,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:06,076 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 655 transitions. [2022-01-18 15:37:06,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 655 transitions. [2022-01-18 15:37:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:06,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:06,076 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:06,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:06,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:06,276 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:06,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:06,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1796734803, now seen corresponding path program 343 times [2022-01-18 15:37:06,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:06,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211385690] [2022-01-18 15:37:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:06,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:06,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211385690] [2022-01-18 15:37:06,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211385690] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:06,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121383350] [2022-01-18 15:37:06,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:37:06,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:06,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:06,387 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:06,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-01-18 15:37:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:06,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:37:06,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:06,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:37:06,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:37:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:06,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:06,681 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:06,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:37:06,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:37:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:06,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121383350] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:06,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:06,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:37:06,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117388349] [2022-01-18 15:37:06,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:06,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:37:06,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:37:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:37:06,713 INFO L87 Difference]: Start difference. First operand 255 states and 655 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:06,979 INFO L93 Difference]: Finished difference Result 292 states and 723 transitions. [2022-01-18 15:37:06,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:37:06,979 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:06,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:06,979 INFO L225 Difference]: With dead ends: 292 [2022-01-18 15:37:06,979 INFO L226 Difference]: Without dead ends: 292 [2022-01-18 15:37:06,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:37:06,980 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:06,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 103 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 282 Invalid, 0 Unknown, 26 Unchecked, 0.1s Time] [2022-01-18 15:37:06,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-18 15:37:06,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 258. [2022-01-18 15:37:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.5797665369649807) internal successors, (663), 257 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 663 transitions. [2022-01-18 15:37:06,982 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 663 transitions. Word has length 18 [2022-01-18 15:37:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:06,982 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 663 transitions. [2022-01-18 15:37:06,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:06,983 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 663 transitions. [2022-01-18 15:37:06,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:06,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:06,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:06,998 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-01-18 15:37:07,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable363 [2022-01-18 15:37:07,183 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:07,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1365585711, now seen corresponding path program 344 times [2022-01-18 15:37:07,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565533314] [2022-01-18 15:37:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:07,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:07,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565533314] [2022-01-18 15:37:07,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565533314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:07,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496682337] [2022-01-18 15:37:07,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:37:07,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:07,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:07,353 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:07,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-01-18 15:37:07,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:37:07,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:07,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:07,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:07,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:07,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 111 [2022-01-18 15:37:07,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:07,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-01-18 15:37:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:07,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:08,336 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:08,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:37:08,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:37:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496682337] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:08,359 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:08,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-01-18 15:37:08,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443354706] [2022-01-18 15:37:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:08,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:37:08,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:37:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:37:08,360 INFO L87 Difference]: Start difference. First operand 258 states and 663 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:08,901 INFO L93 Difference]: Finished difference Result 326 states and 769 transitions. [2022-01-18 15:37:08,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:37:08,902 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:08,902 INFO L225 Difference]: With dead ends: 326 [2022-01-18 15:37:08,902 INFO L226 Difference]: Without dead ends: 319 [2022-01-18 15:37:08,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:37:08,902 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:08,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 267 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-18 15:37:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 262. [2022-01-18 15:37:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.57088122605364) internal successors, (671), 261 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 671 transitions. [2022-01-18 15:37:08,905 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 671 transitions. Word has length 18 [2022-01-18 15:37:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:08,905 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 671 transitions. [2022-01-18 15:37:08,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:08,905 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 671 transitions. [2022-01-18 15:37:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:08,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:08,906 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:08,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:09,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-01-18 15:37:09,106 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:09,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1572137727, now seen corresponding path program 345 times [2022-01-18 15:37:09,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412527983] [2022-01-18 15:37:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:09,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:09,378 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:09,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:09,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412527983] [2022-01-18 15:37:09,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412527983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:09,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390001699] [2022-01-18 15:37:09,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:37:09,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:09,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:09,379 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:09,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-01-18 15:37:09,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:37:09,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:09,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:09,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:09,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:37:09,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:09,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:37:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:09,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:10,379 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:10,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 115 [2022-01-18 15:37:10,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2022-01-18 15:37:10,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:10,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390001699] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:10,399 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:10,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:37:10,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034900238] [2022-01-18 15:37:10,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:10,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:37:10,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:37:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:10,400 INFO L87 Difference]: Start difference. First operand 262 states and 671 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:11,171 INFO L93 Difference]: Finished difference Result 400 states and 917 transitions. [2022-01-18 15:37:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:11,172 INFO L225 Difference]: With dead ends: 400 [2022-01-18 15:37:11,172 INFO L226 Difference]: Without dead ends: 393 [2022-01-18 15:37:11,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=140, Invalid=1120, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:37:11,173 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:11,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 216 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:11,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-18 15:37:11,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 274. [2022-01-18 15:37:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.6043956043956045) internal successors, (711), 273 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:11,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 711 transitions. [2022-01-18 15:37:11,176 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 711 transitions. Word has length 18 [2022-01-18 15:37:11,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:11,176 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 711 transitions. [2022-01-18 15:37:11,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:11,176 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 711 transitions. [2022-01-18 15:37:11,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:11,177 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:11,177 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:11,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Ended with exit code 0 [2022-01-18 15:37:11,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-01-18 15:37:11,377 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:11,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:11,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1587598523, now seen corresponding path program 346 times [2022-01-18 15:37:11,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:11,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405907764] [2022-01-18 15:37:11,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:11,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:11,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:11,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:11,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405907764] [2022-01-18 15:37:11,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405907764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:11,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360142255] [2022-01-18 15:37:11,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:37:11,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:11,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:11,625 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:11,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-01-18 15:37:11,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:37:11,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:11,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:11,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:11,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:11,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:37:11,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:11,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:37:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:12,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:12,594 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:12,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:37:12,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:37:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:12,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360142255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:12,617 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:12,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:37:12,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958340123] [2022-01-18 15:37:12,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:12,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:37:12,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:12,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:37:12,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=581, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:37:12,618 INFO L87 Difference]: Start difference. First operand 274 states and 711 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:13,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:13,471 INFO L93 Difference]: Finished difference Result 404 states and 922 transitions. [2022-01-18 15:37:13,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:13,471 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:13,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:13,472 INFO L225 Difference]: With dead ends: 404 [2022-01-18 15:37:13,472 INFO L226 Difference]: Without dead ends: 397 [2022-01-18 15:37:13,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=145, Invalid=1187, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:37:13,472 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 109 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:13,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 261 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:13,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-18 15:37:13,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 274. [2022-01-18 15:37:13,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.6043956043956045) internal successors, (711), 273 states have internal predecessors, (711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:13,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 711 transitions. [2022-01-18 15:37:13,475 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 711 transitions. Word has length 18 [2022-01-18 15:37:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:13,475 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 711 transitions. [2022-01-18 15:37:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 711 transitions. [2022-01-18 15:37:13,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:13,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:13,476 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:13,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Ended with exit code 0 [2022-01-18 15:37:13,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-01-18 15:37:13,676 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:13,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:13,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2135913967, now seen corresponding path program 347 times [2022-01-18 15:37:13,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:13,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807685699] [2022-01-18 15:37:13,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:13,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:13,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:13,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:13,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807685699] [2022-01-18 15:37:13,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807685699] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:13,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691371656] [2022-01-18 15:37:13,871 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:37:13,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:13,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:13,872 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:13,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-01-18 15:37:13,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:37:13,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:13,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:13,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:14,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:14,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 111 [2022-01-18 15:37:14,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:14,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-01-18 15:37:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:14,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:14,903 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:14,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:14,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:14,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691371656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:14,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:14,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:37:14,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345920120] [2022-01-18 15:37:14,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:14,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:37:14,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:14,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:37:14,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:14,924 INFO L87 Difference]: Start difference. First operand 274 states and 711 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:15,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:15,606 INFO L93 Difference]: Finished difference Result 417 states and 937 transitions. [2022-01-18 15:37:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:37:15,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:15,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:15,606 INFO L225 Difference]: With dead ends: 417 [2022-01-18 15:37:15,607 INFO L226 Difference]: Without dead ends: 410 [2022-01-18 15:37:15,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:37:15,607 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 117 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:15,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 343 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:37:15,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-01-18 15:37:15,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 272. [2022-01-18 15:37:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.5977859778597785) internal successors, (704), 271 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:15,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 704 transitions. [2022-01-18 15:37:15,610 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 704 transitions. Word has length 18 [2022-01-18 15:37:15,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:15,610 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 704 transitions. [2022-01-18 15:37:15,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:15,610 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 704 transitions. [2022-01-18 15:37:15,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:15,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:15,610 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:15,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-01-18 15:37:15,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable367 [2022-01-18 15:37:15,811 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:15,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:15,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1600684165, now seen corresponding path program 348 times [2022-01-18 15:37:15,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:15,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721359175] [2022-01-18 15:37:15,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:15,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:16,002 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721359175] [2022-01-18 15:37:16,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721359175] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523192304] [2022-01-18 15:37:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:37:16,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:16,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:16,003 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:16,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-01-18 15:37:16,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:37:16,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:16,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:16,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:16,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:16,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:16,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:16,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:17,133 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:17,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:37:17,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:37:17,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:17,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523192304] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:17,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:17,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:37:17,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20925326] [2022-01-18 15:37:17,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:17,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:37:17,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:37:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:17,153 INFO L87 Difference]: Start difference. First operand 272 states and 704 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:17,789 INFO L93 Difference]: Finished difference Result 413 states and 922 transitions. [2022-01-18 15:37:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:37:17,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:17,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:17,790 INFO L225 Difference]: With dead ends: 413 [2022-01-18 15:37:17,790 INFO L226 Difference]: Without dead ends: 406 [2022-01-18 15:37:17,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:37:17,790 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 132 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:17,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 327 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:17,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-18 15:37:17,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 271. [2022-01-18 15:37:17,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.596296296296296) internal successors, (701), 270 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:17,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 701 transitions. [2022-01-18 15:37:17,794 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 701 transitions. Word has length 18 [2022-01-18 15:37:17,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:17,794 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 701 transitions. [2022-01-18 15:37:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:17,794 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 701 transitions. [2022-01-18 15:37:17,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:17,794 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:17,794 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:17,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:17,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable368 [2022-01-18 15:37:17,995 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:17,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:17,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2106537809, now seen corresponding path program 349 times [2022-01-18 15:37:17,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:17,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919029221] [2022-01-18 15:37:17,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:17,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:18,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919029221] [2022-01-18 15:37:18,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919029221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:18,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302270945] [2022-01-18 15:37:18,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:37:18,263 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:18,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:18,264 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:18,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-01-18 15:37:18,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:18,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:18,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:18,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:18,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 111 [2022-01-18 15:37:18,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:18,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 91 [2022-01-18 15:37:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:18,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:19,308 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:19,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:19,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:19,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302270945] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:19,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:37:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748482414] [2022-01-18 15:37:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:37:19,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:19,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:37:19,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:37:19,328 INFO L87 Difference]: Start difference. First operand 271 states and 701 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:19,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:19,873 INFO L93 Difference]: Finished difference Result 380 states and 871 transitions. [2022-01-18 15:37:19,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:19,873 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:19,874 INFO L225 Difference]: With dead ends: 380 [2022-01-18 15:37:19,874 INFO L226 Difference]: Without dead ends: 373 [2022-01-18 15:37:19,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:37:19,874 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 81 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:19,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 363 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 784 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:19,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-18 15:37:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 279. [2022-01-18 15:37:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.5719424460431655) internal successors, (715), 278 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:19,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 715 transitions. [2022-01-18 15:37:19,877 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 715 transitions. Word has length 18 [2022-01-18 15:37:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:19,877 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 715 transitions. [2022-01-18 15:37:19,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 715 transitions. [2022-01-18 15:37:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:19,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:19,877 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:19,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Ended with exit code 0 [2022-01-18 15:37:20,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-01-18 15:37:20,078 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:20,078 INFO L85 PathProgramCache]: Analyzing trace with hash 24375935, now seen corresponding path program 350 times [2022-01-18 15:37:20,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:20,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099809445] [2022-01-18 15:37:20,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:20,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:20,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:20,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099809445] [2022-01-18 15:37:20,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099809445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:20,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224955618] [2022-01-18 15:37:20,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:37:20,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:20,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:20,323 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:20,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-01-18 15:37:20,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:37:20,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:20,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:20,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:20,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:20,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:37:20,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:20,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:37:20,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:20,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:21,419 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:21,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:21,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:21,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:21,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224955618] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:21,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:21,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:37:21,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61201584] [2022-01-18 15:37:21,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:21,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:37:21,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:21,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:37:21,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:37:21,438 INFO L87 Difference]: Start difference. First operand 279 states and 715 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:21,911 INFO L93 Difference]: Finished difference Result 431 states and 989 transitions. [2022-01-18 15:37:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:21,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:21,912 INFO L225 Difference]: With dead ends: 431 [2022-01-18 15:37:21,912 INFO L226 Difference]: Without dead ends: 424 [2022-01-18 15:37:21,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:37:21,913 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 91 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:21,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 383 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:21,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-18 15:37:21,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 294. [2022-01-18 15:37:21,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.6006825938566553) internal successors, (762), 293 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 762 transitions. [2022-01-18 15:37:21,916 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 762 transitions. Word has length 18 [2022-01-18 15:37:21,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:21,916 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 762 transitions. [2022-01-18 15:37:21,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:21,916 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 762 transitions. [2022-01-18 15:37:21,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:21,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:21,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:21,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Ended with exit code 0 [2022-01-18 15:37:22,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2022-01-18 15:37:22,117 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:22,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash -996193925, now seen corresponding path program 351 times [2022-01-18 15:37:22,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285509598] [2022-01-18 15:37:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:22,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:22,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:22,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285509598] [2022-01-18 15:37:22,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285509598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:22,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816256601] [2022-01-18 15:37:22,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:37:22,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:22,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:22,307 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:22,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-01-18 15:37:22,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:37:22,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:22,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:22,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:22,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:22,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:37:22,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:22,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:37:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:22,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:23,341 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:23,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:23,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:23,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816256601] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:23,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:23,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:37:23,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687124615] [2022-01-18 15:37:23,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:23,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:37:23,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:23,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:37:23,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:37:23,360 INFO L87 Difference]: Start difference. First operand 294 states and 762 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:24,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:24,094 INFO L93 Difference]: Finished difference Result 484 states and 1082 transitions. [2022-01-18 15:37:24,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:37:24,094 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:24,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:24,094 INFO L225 Difference]: With dead ends: 484 [2022-01-18 15:37:24,095 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:37:24,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:37:24,095 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 119 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 1013 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:24,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 443 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1013 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:37:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:37:24,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 298. [2022-01-18 15:37:24,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.6094276094276094) internal successors, (775), 297 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 775 transitions. [2022-01-18 15:37:24,098 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 775 transitions. Word has length 18 [2022-01-18 15:37:24,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:24,098 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 775 transitions. [2022-01-18 15:37:24,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:24,098 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 775 transitions. [2022-01-18 15:37:24,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:24,107 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:24,107 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:24,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:24,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:24,322 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:24,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:24,322 INFO L85 PathProgramCache]: Analyzing trace with hash -613473537, now seen corresponding path program 352 times [2022-01-18 15:37:24,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:24,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410833752] [2022-01-18 15:37:24,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:24,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:24,539 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:24,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:24,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410833752] [2022-01-18 15:37:24,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410833752] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:24,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664591128] [2022-01-18 15:37:24,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:37:24,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:24,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:24,540 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:24,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-01-18 15:37:24,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:37:24,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:24,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:24,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:24,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:24,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:37:24,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:24,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:37:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:25,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:25,557 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:25,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:25,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:25,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:25,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664591128] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:25,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:25,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:37:25,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335736094] [2022-01-18 15:37:25,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:25,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:37:25,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:25,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:37:25,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:37:25,576 INFO L87 Difference]: Start difference. First operand 298 states and 775 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:26,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:26,392 INFO L93 Difference]: Finished difference Result 489 states and 1097 transitions. [2022-01-18 15:37:26,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:37:26,392 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:26,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:26,393 INFO L225 Difference]: With dead ends: 489 [2022-01-18 15:37:26,393 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:37:26,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:37:26,393 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 105 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:26,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 507 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:37:26,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:37:26,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 300. [2022-01-18 15:37:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6153846153846154) internal successors, (782), 299 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:26,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 782 transitions. [2022-01-18 15:37:26,397 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 782 transitions. Word has length 18 [2022-01-18 15:37:26,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:26,397 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 782 transitions. [2022-01-18 15:37:26,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 782 transitions. [2022-01-18 15:37:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:26,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:26,397 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:26,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-01-18 15:37:26,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:26,598 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash 507250939, now seen corresponding path program 353 times [2022-01-18 15:37:26,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994741921] [2022-01-18 15:37:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:26,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:26,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:26,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994741921] [2022-01-18 15:37:26,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994741921] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:26,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450704923] [2022-01-18 15:37:26,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:37:26,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:26,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:26,793 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:26,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-01-18 15:37:26,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:37:26,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:26,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:26,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:27,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:27,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:37:27,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:27,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:37:27,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:27,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:27,743 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:27,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 101 [2022-01-18 15:37:27,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-01-18 15:37:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:27,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450704923] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:27,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:27,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:37:27,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561312099] [2022-01-18 15:37:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:27,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:37:27,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:37:27,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:27,762 INFO L87 Difference]: Start difference. First operand 300 states and 782 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:28,424 INFO L93 Difference]: Finished difference Result 468 states and 1062 transitions. [2022-01-18 15:37:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:37:28,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:28,425 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:37:28,425 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 15:37:28,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:37:28,426 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 94 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:28,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 383 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:37:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 15:37:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 300. [2022-01-18 15:37:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.6153846153846154) internal successors, (782), 299 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 782 transitions. [2022-01-18 15:37:28,429 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 782 transitions. Word has length 18 [2022-01-18 15:37:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:28,429 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 782 transitions. [2022-01-18 15:37:28,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 782 transitions. [2022-01-18 15:37:28,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:28,429 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:28,430 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:28,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-01-18 15:37:28,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:28,645 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:28,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 491790143, now seen corresponding path program 354 times [2022-01-18 15:37:28,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540864018] [2022-01-18 15:37:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:28,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:28,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540864018] [2022-01-18 15:37:28,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540864018] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:28,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909554519] [2022-01-18 15:37:28,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:37:28,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:28,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:28,847 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:28,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-01-18 15:37:28,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:37:28,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:28,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:28,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:29,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:29,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:37:29,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:29,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:37:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:29,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:29,752 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:29,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:37:29,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:37:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909554519] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:29,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:29,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:37:29,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644213601] [2022-01-18 15:37:29,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:29,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:37:29,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:29,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:37:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:29,771 INFO L87 Difference]: Start difference. First operand 300 states and 782 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:30,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:30,433 INFO L93 Difference]: Finished difference Result 444 states and 1026 transitions. [2022-01-18 15:37:30,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:37:30,434 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:30,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:30,434 INFO L225 Difference]: With dead ends: 444 [2022-01-18 15:37:30,434 INFO L226 Difference]: Without dead ends: 430 [2022-01-18 15:37:30,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:37:30,435 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 85 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:30,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 362 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:37:30,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-01-18 15:37:30,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 291. [2022-01-18 15:37:30,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.593103448275862) internal successors, (752), 290 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 752 transitions. [2022-01-18 15:37:30,438 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 752 transitions. Word has length 18 [2022-01-18 15:37:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:30,438 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 752 transitions. [2022-01-18 15:37:30,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 752 transitions. [2022-01-18 15:37:30,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:30,438 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:30,438 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:30,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-01-18 15:37:30,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:30,639 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:30,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1433345705, now seen corresponding path program 355 times [2022-01-18 15:37:30,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:30,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816431058] [2022-01-18 15:37:30,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:30,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:30,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816431058] [2022-01-18 15:37:30,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816431058] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:30,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835253296] [2022-01-18 15:37:30,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:37:30,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:30,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:30,744 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:30,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-01-18 15:37:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:30,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:37:30,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:30,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:37:30,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:37:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:30,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:31,055 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:31,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:37:31,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:37:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:31,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835253296] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:31,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:31,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:37:31,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533603178] [2022-01-18 15:37:31,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:31,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:37:31,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:31,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:37:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:37:31,087 INFO L87 Difference]: Start difference. First operand 291 states and 752 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:31,343 INFO L93 Difference]: Finished difference Result 395 states and 954 transitions. [2022-01-18 15:37:31,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:37:31,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:31,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:31,343 INFO L225 Difference]: With dead ends: 395 [2022-01-18 15:37:31,343 INFO L226 Difference]: Without dead ends: 395 [2022-01-18 15:37:31,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:37:31,344 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:31,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 108 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 296 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-01-18 15:37:31,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-01-18 15:37:31,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 283. [2022-01-18 15:37:31,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.5886524822695036) internal successors, (730), 282 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:31,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 730 transitions. [2022-01-18 15:37:31,347 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 730 transitions. Word has length 18 [2022-01-18 15:37:31,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:31,347 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 730 transitions. [2022-01-18 15:37:31,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:31,347 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 730 transitions. [2022-01-18 15:37:31,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:31,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:31,347 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:31,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-01-18 15:37:31,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable375,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:31,547 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:31,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:31,548 INFO L85 PathProgramCache]: Analyzing trace with hash -758427857, now seen corresponding path program 356 times [2022-01-18 15:37:31,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747660434] [2022-01-18 15:37:31,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:31,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:31,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:31,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747660434] [2022-01-18 15:37:31,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747660434] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:31,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40527970] [2022-01-18 15:37:31,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:37:31,693 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:31,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:31,694 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:31,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-01-18 15:37:31,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:37:31,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:31,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:31,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:31,936 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:31,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:31,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:31,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:32,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:32,497 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:32,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:37:32,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:37:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:32,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40527970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:32,520 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:32,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:37:32,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334026452] [2022-01-18 15:37:32,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:37:32,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:32,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:37:32,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:37:32,521 INFO L87 Difference]: Start difference. First operand 283 states and 730 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:32,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:32,819 INFO L93 Difference]: Finished difference Result 368 states and 882 transitions. [2022-01-18 15:37:32,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:37:32,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:32,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:32,820 INFO L225 Difference]: With dead ends: 368 [2022-01-18 15:37:32,820 INFO L226 Difference]: Without dead ends: 361 [2022-01-18 15:37:32,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:37:32,820 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:32,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 224 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 606 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-01-18 15:37:32,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-18 15:37:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 285. [2022-01-18 15:37:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.5950704225352115) internal successors, (737), 284 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 737 transitions. [2022-01-18 15:37:32,823 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 737 transitions. Word has length 18 [2022-01-18 15:37:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:32,823 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 737 transitions. [2022-01-18 15:37:32,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:32,824 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 737 transitions. [2022-01-18 15:37:32,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:32,824 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:32,824 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:32,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Ended with exit code 0 [2022-01-18 15:37:33,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2022-01-18 15:37:33,024 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:33,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:33,025 INFO L85 PathProgramCache]: Analyzing trace with hash -773888653, now seen corresponding path program 357 times [2022-01-18 15:37:33,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:33,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035680540] [2022-01-18 15:37:33,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:33,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:33,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035680540] [2022-01-18 15:37:33,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035680540] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:33,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517151305] [2022-01-18 15:37:33,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:37:33,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:33,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:33,160 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:33,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-01-18 15:37:33,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:37:33,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:33,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:33,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:33,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:33,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:33,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:33,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:33,531 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:33,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:33,944 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:33,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:37:33,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:37:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:33,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517151305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:33,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:33,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:37:33,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009428659] [2022-01-18 15:37:33,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:33,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:37:33,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:33,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:37:33,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:37:33,967 INFO L87 Difference]: Start difference. First operand 285 states and 737 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:34,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:34,270 INFO L93 Difference]: Finished difference Result 359 states and 869 transitions. [2022-01-18 15:37:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:37:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:34,271 INFO L225 Difference]: With dead ends: 359 [2022-01-18 15:37:34,271 INFO L226 Difference]: Without dead ends: 352 [2022-01-18 15:37:34,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:37:34,271 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 37 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:34,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 214 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 606 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2022-01-18 15:37:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-18 15:37:34,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 285. [2022-01-18 15:37:34,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.5950704225352115) internal successors, (737), 284 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 737 transitions. [2022-01-18 15:37:34,274 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 737 transitions. Word has length 18 [2022-01-18 15:37:34,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:34,274 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 737 transitions. [2022-01-18 15:37:34,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:34,274 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 737 transitions. [2022-01-18 15:37:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:34,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:34,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:34,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-01-18 15:37:34,475 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:34,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:34,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1345343459, now seen corresponding path program 358 times [2022-01-18 15:37:34,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:34,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127400452] [2022-01-18 15:37:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:34,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:34,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:34,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127400452] [2022-01-18 15:37:34,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127400452] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:34,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854249571] [2022-01-18 15:37:34,655 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:37:34,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:34,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:34,656 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:34,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-01-18 15:37:34,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:37:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:34,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:34,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:34,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:37:34,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:34,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:37:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:35,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:35,589 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:35,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:37:35,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:37:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:35,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854249571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:35,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:35,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 23 [2022-01-18 15:37:35,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790578553] [2022-01-18 15:37:35,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:35,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:35,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:35,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:35,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:35,613 INFO L87 Difference]: Start difference. First operand 285 states and 737 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:35,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:35,870 INFO L93 Difference]: Finished difference Result 381 states and 896 transitions. [2022-01-18 15:37:35,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:35,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:35,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:35,870 INFO L225 Difference]: With dead ends: 381 [2022-01-18 15:37:35,870 INFO L226 Difference]: Without dead ends: 367 [2022-01-18 15:37:35,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:37:35,871 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 69 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:35,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 218 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 495 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-18 15:37:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-18 15:37:35,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 274. [2022-01-18 15:37:35,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.5750915750915753) internal successors, (703), 273 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 703 transitions. [2022-01-18 15:37:35,874 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 703 transitions. Word has length 18 [2022-01-18 15:37:35,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:35,874 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 703 transitions. [2022-01-18 15:37:35,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:35,874 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 703 transitions. [2022-01-18 15:37:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:35,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:35,874 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:35,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-01-18 15:37:36,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-01-18 15:37:36,075 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1771459327, now seen corresponding path program 359 times [2022-01-18 15:37:36,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:36,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215297737] [2022-01-18 15:37:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:36,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:36,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:36,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215297737] [2022-01-18 15:37:36,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215297737] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:36,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528093764] [2022-01-18 15:37:36,225 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:37:36,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:36,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:36,226 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:36,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-01-18 15:37:36,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:37:36,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:36,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:36,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:36,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:37:36,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:36,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:37:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:36,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:37,064 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:37,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:37:37,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:37:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:37,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528093764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:37,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:37,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 21 [2022-01-18 15:37:37,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229469437] [2022-01-18 15:37:37,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:37,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:37:37,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:37,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:37:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:37:37,087 INFO L87 Difference]: Start difference. First operand 274 states and 703 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:37,533 INFO L93 Difference]: Finished difference Result 357 states and 854 transitions. [2022-01-18 15:37:37,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:37:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:37,534 INFO L225 Difference]: With dead ends: 357 [2022-01-18 15:37:37,534 INFO L226 Difference]: Without dead ends: 350 [2022-01-18 15:37:37,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:37,534 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 73 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:37,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 198 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:37:37,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-01-18 15:37:37,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 281. [2022-01-18 15:37:37,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.5892857142857144) internal successors, (725), 280 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:37,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 725 transitions. [2022-01-18 15:37:37,537 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 725 transitions. Word has length 18 [2022-01-18 15:37:37,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:37,537 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 725 transitions. [2022-01-18 15:37:37,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:37,537 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 725 transitions. [2022-01-18 15:37:37,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:37,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:37,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:37,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Ended with exit code 0 [2022-01-18 15:37:37,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:37,738 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:37,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:37,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1402783493, now seen corresponding path program 360 times [2022-01-18 15:37:37,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:37,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053454802] [2022-01-18 15:37:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:37,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:37,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:37,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053454802] [2022-01-18 15:37:37,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053454802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:37,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97952558] [2022-01-18 15:37:37,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:37:37,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:37,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:37,928 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:37,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-01-18 15:37:37,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:37:37,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:37,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:38,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:38,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:37:38,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:38,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:37:38,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:38,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:38,694 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:38,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:37:38,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:37:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:38,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97952558] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:38,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:38,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 21 [2022-01-18 15:37:38,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544111127] [2022-01-18 15:37:38,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:38,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:37:38,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:38,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:37:38,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:37:38,716 INFO L87 Difference]: Start difference. First operand 281 states and 725 transitions. Second operand has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:39,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:39,154 INFO L93 Difference]: Finished difference Result 373 states and 880 transitions. [2022-01-18 15:37:39,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:37:39,154 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:39,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:39,155 INFO L225 Difference]: With dead ends: 373 [2022-01-18 15:37:39,155 INFO L226 Difference]: Without dead ends: 366 [2022-01-18 15:37:39,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:39,155 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:39,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 226 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:37:39,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-18 15:37:39,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 282. [2022-01-18 15:37:39,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.5943060498220643) internal successors, (729), 281 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:39,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 729 transitions. [2022-01-18 15:37:39,158 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 729 transitions. Word has length 18 [2022-01-18 15:37:39,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:39,158 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 729 transitions. [2022-01-18 15:37:39,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 21 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:39,158 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 729 transitions. [2022-01-18 15:37:39,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:39,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:39,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:39,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-01-18 15:37:39,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:39,359 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:39,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:39,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1418244289, now seen corresponding path program 361 times [2022-01-18 15:37:39,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:39,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279349765] [2022-01-18 15:37:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:39,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:39,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:39,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:39,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279349765] [2022-01-18 15:37:39,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279349765] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384801315] [2022-01-18 15:37:39,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:37:39,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:39,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:39,503 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:39,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-01-18 15:37:39,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:39,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:39,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:39,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:39,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:37:39,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:39,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:37:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:39,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:40,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:40,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:37:40,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:37:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:40,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384801315] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:40,282 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:40,282 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:37:40,282 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383360291] [2022-01-18 15:37:40,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:40,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:37:40,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:37:40,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:37:40,283 INFO L87 Difference]: Start difference. First operand 282 states and 729 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:40,702 INFO L93 Difference]: Finished difference Result 361 states and 862 transitions. [2022-01-18 15:37:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:37:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:40,703 INFO L225 Difference]: With dead ends: 361 [2022-01-18 15:37:40,703 INFO L226 Difference]: Without dead ends: 354 [2022-01-18 15:37:40,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:37:40,703 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:40,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 229 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:37:40,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-01-18 15:37:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 282. [2022-01-18 15:37:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.5943060498220643) internal successors, (729), 281 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 729 transitions. [2022-01-18 15:37:40,706 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 729 transitions. Word has length 18 [2022-01-18 15:37:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:40,706 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 729 transitions. [2022-01-18 15:37:40,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 729 transitions. [2022-01-18 15:37:40,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:40,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:40,707 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:40,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-01-18 15:37:40,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:40,907 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:40,907 INFO L85 PathProgramCache]: Analyzing trace with hash -327072337, now seen corresponding path program 362 times [2022-01-18 15:37:40,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:40,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387296969] [2022-01-18 15:37:40,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:40,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:41,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387296969] [2022-01-18 15:37:41,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387296969] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397037442] [2022-01-18 15:37:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:37:41,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:41,052 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:41,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-01-18 15:37:41,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:37:41,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:37:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:41,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:41,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:41,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:41,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:41,832 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:41,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:42,589 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:42,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 165 [2022-01-18 15:37:42,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 162 treesize of output 138 [2022-01-18 15:37:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:42,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397037442] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:42,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:42,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 23 [2022-01-18 15:37:42,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283296369] [2022-01-18 15:37:42,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:42,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:42,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:42,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:42,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:42,678 INFO L87 Difference]: Start difference. First operand 282 states and 729 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:44,065 INFO L93 Difference]: Finished difference Result 428 states and 1001 transitions. [2022-01-18 15:37:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:37:44,065 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:44,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:44,066 INFO L225 Difference]: With dead ends: 428 [2022-01-18 15:37:44,066 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 15:37:44,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:37:44,066 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 59 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:44,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 310 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 583 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-01-18 15:37:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 15:37:44,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 285. [2022-01-18 15:37:44,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.6056338028169015) internal successors, (740), 284 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 740 transitions. [2022-01-18 15:37:44,069 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 740 transitions. Word has length 18 [2022-01-18 15:37:44,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:44,069 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 740 transitions. [2022-01-18 15:37:44,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 740 transitions. [2022-01-18 15:37:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:44,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:44,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:44,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:44,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:44,272 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:44,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:44,273 INFO L85 PathProgramCache]: Analyzing trace with hash -342533133, now seen corresponding path program 363 times [2022-01-18 15:37:44,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:44,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603378532] [2022-01-18 15:37:44,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:44,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:44,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:44,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:44,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:44,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603378532] [2022-01-18 15:37:44,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603378532] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:44,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393308599] [2022-01-18 15:37:44,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:37:44,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:44,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:44,412 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:44,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-01-18 15:37:44,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:37:44,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:44,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:44,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:44,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:44,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:44,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:44,793 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:44,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:45,197 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:37:45,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:37:45,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:37:45,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:37:45,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393308599] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:45,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:45,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 21 [2022-01-18 15:37:45,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742140052] [2022-01-18 15:37:45,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:45,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:37:45,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:37:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:37:45,221 INFO L87 Difference]: Start difference. First operand 285 states and 740 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:45,663 INFO L93 Difference]: Finished difference Result 369 states and 881 transitions. [2022-01-18 15:37:45,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:37:45,664 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:45,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:45,664 INFO L225 Difference]: With dead ends: 369 [2022-01-18 15:37:45,664 INFO L226 Difference]: Without dead ends: 362 [2022-01-18 15:37:45,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:37:45,664 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 62 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:45,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 211 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 569 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-01-18 15:37:45,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-01-18 15:37:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 285. [2022-01-18 15:37:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 2.6056338028169015) internal successors, (740), 284 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 740 transitions. [2022-01-18 15:37:45,667 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 740 transitions. Word has length 18 [2022-01-18 15:37:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:45,667 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 740 transitions. [2022-01-18 15:37:45,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:45,668 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 740 transitions. [2022-01-18 15:37:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:45,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:45,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:45,682 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:45,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable383 [2022-01-18 15:37:45,882 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:45,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:45,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1339764869, now seen corresponding path program 364 times [2022-01-18 15:37:45,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:45,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422428362] [2022-01-18 15:37:45,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:45,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:45,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:46,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422428362] [2022-01-18 15:37:46,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422428362] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:46,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607087455] [2022-01-18 15:37:46,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:37:46,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:46,101 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:46,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-01-18 15:37:46,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:37:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:46,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:46,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:46,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:46,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:46,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:46,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:47,060 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:47,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:47,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:47,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607087455] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:47,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:47,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:37:47,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649713271] [2022-01-18 15:37:47,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:47,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:47,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:47,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:47,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:47,084 INFO L87 Difference]: Start difference. First operand 285 states and 740 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:47,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:47,579 INFO L93 Difference]: Finished difference Result 404 states and 944 transitions. [2022-01-18 15:37:47,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:47,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:47,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:47,580 INFO L225 Difference]: With dead ends: 404 [2022-01-18 15:37:47,580 INFO L226 Difference]: Without dead ends: 397 [2022-01-18 15:37:47,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:37:47,580 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:47,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 290 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 668 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-01-18 15:37:47,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-18 15:37:47,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 288. [2022-01-18 15:37:47,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6132404181184667) internal successors, (750), 287 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:47,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 750 transitions. [2022-01-18 15:37:47,583 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 750 transitions. Word has length 18 [2022-01-18 15:37:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:47,583 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 750 transitions. [2022-01-18 15:37:47,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:47,584 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 750 transitions. [2022-01-18 15:37:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:47,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:47,584 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:47,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:47,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:47,784 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1355225665, now seen corresponding path program 365 times [2022-01-18 15:37:47,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:47,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118290445] [2022-01-18 15:37:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:47,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:47,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118290445] [2022-01-18 15:37:47,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118290445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:47,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950955860] [2022-01-18 15:37:47,946 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:37:47,946 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:47,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:47,947 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:47,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-01-18 15:37:47,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:37:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:47,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:48,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:37:48,240 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:48,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:37:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:48,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:48,867 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:48,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:48,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:48,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950955860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:48,888 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:48,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:37:48,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439020210] [2022-01-18 15:37:48,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:48,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:37:48,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:37:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:37:48,889 INFO L87 Difference]: Start difference. First operand 288 states and 750 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:49,337 INFO L93 Difference]: Finished difference Result 408 states and 949 transitions. [2022-01-18 15:37:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:37:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:49,338 INFO L225 Difference]: With dead ends: 408 [2022-01-18 15:37:49,338 INFO L226 Difference]: Without dead ends: 401 [2022-01-18 15:37:49,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:49,338 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 82 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:49,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 241 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 669 Invalid, 0 Unknown, 99 Unchecked, 0.3s Time] [2022-01-18 15:37:49,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2022-01-18 15:37:49,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 288. [2022-01-18 15:37:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6132404181184667) internal successors, (750), 287 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:49,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 750 transitions. [2022-01-18 15:37:49,341 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 750 transitions. Word has length 18 [2022-01-18 15:37:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:49,341 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 750 transitions. [2022-01-18 15:37:49,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 750 transitions. [2022-01-18 15:37:49,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:49,342 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:49,342 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:49,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable385,369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:49,542 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:49,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:49,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1926680471, now seen corresponding path program 366 times [2022-01-18 15:37:49,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:49,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216954659] [2022-01-18 15:37:49,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:49,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:49,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216954659] [2022-01-18 15:37:49,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216954659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:49,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113147019] [2022-01-18 15:37:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:37:49,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:49,716 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:49,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-01-18 15:37:49,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:37:49,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:49,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:50,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:50,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:37:50,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:50,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:37:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:50,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:50,792 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:50,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:37:50,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:37:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:50,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113147019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:50,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:50,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:37:50,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722495872] [2022-01-18 15:37:50,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:50,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:50,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:50,813 INFO L87 Difference]: Start difference. First operand 288 states and 750 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:51,293 INFO L93 Difference]: Finished difference Result 386 states and 914 transitions. [2022-01-18 15:37:51,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:37:51,293 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:51,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:51,294 INFO L225 Difference]: With dead ends: 386 [2022-01-18 15:37:51,294 INFO L226 Difference]: Without dead ends: 372 [2022-01-18 15:37:51,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:37:51,294 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:51,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 310 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 784 Invalid, 0 Unknown, 33 Unchecked, 0.3s Time] [2022-01-18 15:37:51,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-18 15:37:51,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 281. [2022-01-18 15:37:51,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.5964285714285715) internal successors, (727), 280 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:51,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 727 transitions. [2022-01-18 15:37:51,297 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 727 transitions. Word has length 18 [2022-01-18 15:37:51,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:51,297 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 727 transitions. [2022-01-18 15:37:51,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 23 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:51,297 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 727 transitions. [2022-01-18 15:37:51,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:51,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:51,297 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:51,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:51,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-01-18 15:37:51,498 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:51,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1833057023, now seen corresponding path program 367 times [2022-01-18 15:37:51,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:51,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646088510] [2022-01-18 15:37:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:51,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:51,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646088510] [2022-01-18 15:37:51,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646088510] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:51,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296354323] [2022-01-18 15:37:51,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:37:51,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:51,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:51,799 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:51,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-01-18 15:37:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:51,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:52,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:52,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:37:52,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:52,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:37:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:52,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:52,884 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:52,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:52,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:52,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:52,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296354323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:52,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:52,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:37:52,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420540339] [2022-01-18 15:37:52,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:52,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:37:52,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:52,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:37:52,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:52,964 INFO L87 Difference]: Start difference. First operand 281 states and 727 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:53,540 INFO L93 Difference]: Finished difference Result 383 states and 892 transitions. [2022-01-18 15:37:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:37:53,540 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:53,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:53,541 INFO L225 Difference]: With dead ends: 383 [2022-01-18 15:37:53,541 INFO L226 Difference]: Without dead ends: 363 [2022-01-18 15:37:53,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:37:53,541 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:53,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 425 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 780 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-01-18 15:37:53,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-18 15:37:53,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 281. [2022-01-18 15:37:53,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.592857142857143) internal successors, (726), 280 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 726 transitions. [2022-01-18 15:37:53,544 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 726 transitions. Word has length 18 [2022-01-18 15:37:53,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:53,544 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 726 transitions. [2022-01-18 15:37:53,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:53,544 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 726 transitions. [2022-01-18 15:37:53,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:53,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:53,544 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:53,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:53,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-01-18 15:37:53,745 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:53,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:53,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1837772113, now seen corresponding path program 368 times [2022-01-18 15:37:53,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:53,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439428460] [2022-01-18 15:37:53,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:53,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:53,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:53,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:53,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439428460] [2022-01-18 15:37:53,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439428460] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:53,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865235630] [2022-01-18 15:37:53,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:37:53,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:53,920 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:53,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-01-18 15:37:53,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:37:53,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:53,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:53,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:54,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:54,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:37:54,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:54,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:37:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:54,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:54,895 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:54,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:37:54,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:37:54,916 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:54,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865235630] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:54,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:54,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:37:54,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77915274] [2022-01-18 15:37:54,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:54,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:37:54,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:54,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:37:54,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:37:54,917 INFO L87 Difference]: Start difference. First operand 281 states and 726 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:55,390 INFO L93 Difference]: Finished difference Result 393 states and 920 transitions. [2022-01-18 15:37:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:37:55,390 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:55,390 INFO L225 Difference]: With dead ends: 393 [2022-01-18 15:37:55,391 INFO L226 Difference]: Without dead ends: 386 [2022-01-18 15:37:55,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:55,391 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:55,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 286 Invalid, 719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:37:55,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-01-18 15:37:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 284. [2022-01-18 15:37:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 2.6007067137809186) internal successors, (736), 283 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:55,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 736 transitions. [2022-01-18 15:37:55,394 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 736 transitions. Word has length 18 [2022-01-18 15:37:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:55,394 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 736 transitions. [2022-01-18 15:37:55,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 736 transitions. [2022-01-18 15:37:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:55,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:55,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:55,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-01-18 15:37:55,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-01-18 15:37:55,595 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:55,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:55,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1455051725, now seen corresponding path program 369 times [2022-01-18 15:37:55,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:55,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632290673] [2022-01-18 15:37:55,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:55,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:55,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:55,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:55,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632290673] [2022-01-18 15:37:55,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632290673] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:55,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838179312] [2022-01-18 15:37:55,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:37:55,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:55,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:55,800 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:55,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-01-18 15:37:55,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:37:55,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:55,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:56,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:56,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:37:56,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:56,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:37:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:56,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:56,718 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:56,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:37:56,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:37:56,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:56,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838179312] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:56,739 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:56,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-01-18 15:37:56,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713329636] [2022-01-18 15:37:56,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:56,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:37:56,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:37:56,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:37:56,740 INFO L87 Difference]: Start difference. First operand 284 states and 736 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:57,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:57,444 INFO L93 Difference]: Finished difference Result 421 states and 972 transitions. [2022-01-18 15:37:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:37:57,445 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:57,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:57,445 INFO L225 Difference]: With dead ends: 421 [2022-01-18 15:37:57,445 INFO L226 Difference]: Without dead ends: 414 [2022-01-18 15:37:57,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:37:57,446 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 86 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:57,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 328 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 944 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:37:57,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-18 15:37:57,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 286. [2022-01-18 15:37:57,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6070175438596492) internal successors, (743), 285 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 743 transitions. [2022-01-18 15:37:57,449 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 743 transitions. Word has length 18 [2022-01-18 15:37:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:57,449 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 743 transitions. [2022-01-18 15:37:57,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 743 transitions. [2022-01-18 15:37:57,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:57,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:57,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:37:57,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Forceful destruction successful, exit code 0 [2022-01-18 15:37:57,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-01-18 15:37:57,650 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:37:57,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:37:57,650 INFO L85 PathProgramCache]: Analyzing trace with hash -334327249, now seen corresponding path program 370 times [2022-01-18 15:37:57,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:37:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912908265] [2022-01-18 15:37:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:37:57,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:37:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:37:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:57,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:37:57,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912908265] [2022-01-18 15:37:57,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912908265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:37:57,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602445583] [2022-01-18 15:37:57,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:37:57,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:37:57,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:37:57,938 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:37:57,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-01-18 15:37:57,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:37:57,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:37:57,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:37:57,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:37:58,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:58,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:37:58,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:37:58,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:37:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:58,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:37:58,903 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:37:58,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:37:58,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:37:58,976 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:37:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602445583] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:37:58,976 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:37:58,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:37:58,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247349855] [2022-01-18 15:37:58,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:37:58,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:37:58,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:37:58,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:37:58,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:37:58,977 INFO L87 Difference]: Start difference. First operand 286 states and 743 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:59,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:37:59,983 INFO L93 Difference]: Finished difference Result 424 states and 976 transitions. [2022-01-18 15:37:59,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:37:59,983 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:37:59,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:37:59,984 INFO L225 Difference]: With dead ends: 424 [2022-01-18 15:37:59,984 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 15:37:59,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:37:59,984 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:37:59,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 298 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 758 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-01-18 15:37:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 15:37:59,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 291. [2022-01-18 15:37:59,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.606896551724138) internal successors, (756), 290 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:59,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 756 transitions. [2022-01-18 15:37:59,987 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 756 transitions. Word has length 18 [2022-01-18 15:37:59,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:37:59,987 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 756 transitions. [2022-01-18 15:37:59,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:37:59,987 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 756 transitions. [2022-01-18 15:37:59,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:37:59,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:37:59,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:00,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-01-18 15:38:00,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable390 [2022-01-18 15:38:00,188 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:00,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash -349788045, now seen corresponding path program 371 times [2022-01-18 15:38:00,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:00,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785607439] [2022-01-18 15:38:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:00,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:00,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:00,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785607439] [2022-01-18 15:38:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785607439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:00,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915423820] [2022-01-18 15:38:00,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:38:00,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:00,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:00,419 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:00,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-01-18 15:38:00,444 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:38:00,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:00,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:00,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:00,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:00,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:38:00,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:00,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:38:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:00,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:01,307 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:01,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:38:01,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:38:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:01,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915423820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:01,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:01,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 25 [2022-01-18 15:38:01,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584639516] [2022-01-18 15:38:01,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:01,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:01,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:01,329 INFO L87 Difference]: Start difference. First operand 291 states and 756 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:02,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:02,121 INFO L93 Difference]: Finished difference Result 411 states and 960 transitions. [2022-01-18 15:38:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:38:02,122 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:02,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:02,135 INFO L225 Difference]: With dead ends: 411 [2022-01-18 15:38:02,135 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 15:38:02,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:38:02,136 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 94 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:02,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 296 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 826 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:38:02,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 15:38:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 283. [2022-01-18 15:38:02,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.5886524822695036) internal successors, (730), 282 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:02,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 730 transitions. [2022-01-18 15:38:02,139 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 730 transitions. Word has length 18 [2022-01-18 15:38:02,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:02,139 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 730 transitions. [2022-01-18 15:38:02,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:02,139 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 730 transitions. [2022-01-18 15:38:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:02,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:02,140 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:02,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-01-18 15:38:02,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable391 [2022-01-18 15:38:02,340 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:02,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:02,340 INFO L85 PathProgramCache]: Analyzing trace with hash -2036388737, now seen corresponding path program 372 times [2022-01-18 15:38:02,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:02,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288211282] [2022-01-18 15:38:02,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:02,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:02,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288211282] [2022-01-18 15:38:02,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288211282] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:02,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106005932] [2022-01-18 15:38:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:38:02,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:02,495 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:02,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-01-18 15:38:02,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:38:02,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:02,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:02,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:02,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:38:02,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:02,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:38:02,936 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:02,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:03,391 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:03,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:38:03,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:38:03,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:03,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106005932] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:03,413 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:03,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 21 [2022-01-18 15:38:03,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879376491] [2022-01-18 15:38:03,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:03,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:38:03,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:03,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:38:03,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:38:03,414 INFO L87 Difference]: Start difference. First operand 283 states and 730 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:03,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:03,830 INFO L93 Difference]: Finished difference Result 383 states and 916 transitions. [2022-01-18 15:38:03,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:38:03,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:03,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:03,831 INFO L225 Difference]: With dead ends: 383 [2022-01-18 15:38:03,831 INFO L226 Difference]: Without dead ends: 376 [2022-01-18 15:38:03,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:03,832 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:03,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 273 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:38:03,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-18 15:38:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 294. [2022-01-18 15:38:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.614334470989761) internal successors, (766), 293 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:03,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 766 transitions. [2022-01-18 15:38:03,835 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 766 transitions. Word has length 18 [2022-01-18 15:38:03,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:03,835 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 766 transitions. [2022-01-18 15:38:03,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 21 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:03,835 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 766 transitions. [2022-01-18 15:38:03,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:03,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:03,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:03,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-01-18 15:38:04,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-01-18 15:38:04,036 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:04,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:04,036 INFO L85 PathProgramCache]: Analyzing trace with hash -915664261, now seen corresponding path program 373 times [2022-01-18 15:38:04,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:04,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454692345] [2022-01-18 15:38:04,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:04,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:04,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:04,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454692345] [2022-01-18 15:38:04,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454692345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:04,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109121569] [2022-01-18 15:38:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:38:04,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:04,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:04,169 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:04,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-01-18 15:38:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:04,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:04,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:04,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:38:04,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:04,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:38:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:04,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:04,919 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:04,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:38:04,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:38:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:04,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109121569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:04,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:04,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:38:04,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563517326] [2022-01-18 15:38:04,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:04,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:38:04,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:38:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:38:04,944 INFO L87 Difference]: Start difference. First operand 294 states and 766 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:05,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:05,266 INFO L93 Difference]: Finished difference Result 399 states and 942 transitions. [2022-01-18 15:38:05,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:38:05,266 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:05,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:05,267 INFO L225 Difference]: With dead ends: 399 [2022-01-18 15:38:05,267 INFO L226 Difference]: Without dead ends: 392 [2022-01-18 15:38:05,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:38:05,267 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:05,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 217 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:38:05,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-18 15:38:05,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 294. [2022-01-18 15:38:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.614334470989761) internal successors, (766), 293 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:05,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 766 transitions. [2022-01-18 15:38:05,271 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 766 transitions. Word has length 18 [2022-01-18 15:38:05,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:05,271 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 766 transitions. [2022-01-18 15:38:05,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 766 transitions. [2022-01-18 15:38:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:05,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:05,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:05,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Ended with exit code 0 [2022-01-18 15:38:05,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:05,472 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash -931125057, now seen corresponding path program 374 times [2022-01-18 15:38:05,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:05,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36402747] [2022-01-18 15:38:05,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:05,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:05,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:05,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36402747] [2022-01-18 15:38:05,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36402747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:05,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854757685] [2022-01-18 15:38:05,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:38:05,669 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:05,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:05,670 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:05,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-01-18 15:38:05,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:38:05,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:05,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:05,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:05,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:05,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:38:05,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:05,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:38:05,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:05,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:06,467 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:06,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:38:06,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:38:06,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:06,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854757685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:06,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:06,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:38:06,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610548136] [2022-01-18 15:38:06,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:06,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:38:06,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:06,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:38:06,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:38:06,490 INFO L87 Difference]: Start difference. First operand 294 states and 766 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:06,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:06,915 INFO L93 Difference]: Finished difference Result 387 states and 924 transitions. [2022-01-18 15:38:06,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:38:06,916 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:06,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:06,916 INFO L225 Difference]: With dead ends: 387 [2022-01-18 15:38:06,916 INFO L226 Difference]: Without dead ends: 380 [2022-01-18 15:38:06,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:38:06,917 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:06,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 279 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:38:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-18 15:38:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 292. [2022-01-18 15:38:06,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.6082474226804124) internal successors, (759), 291 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 759 transitions. [2022-01-18 15:38:06,920 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 759 transitions. Word has length 18 [2022-01-18 15:38:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:06,920 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 759 transitions. [2022-01-18 15:38:06,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 759 transitions. [2022-01-18 15:38:06,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:06,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:06,920 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:06,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-01-18 15:38:07,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:07,121 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:07,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:07,121 INFO L85 PathProgramCache]: Analyzing trace with hash 160046895, now seen corresponding path program 375 times [2022-01-18 15:38:07,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:07,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976915705] [2022-01-18 15:38:07,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:07,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:07,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:07,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:07,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976915705] [2022-01-18 15:38:07,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976915705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:07,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433627860] [2022-01-18 15:38:07,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:38:07,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:07,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:07,260 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:07,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-01-18 15:38:07,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:38:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:38:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:07,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:07,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:07,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:07,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:07,901 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:07,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:08,673 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:08,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 176 treesize of output 155 [2022-01-18 15:38:08,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 152 treesize of output 128 [2022-01-18 15:38:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:08,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433627860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:08,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:08,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 22 [2022-01-18 15:38:08,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437499284] [2022-01-18 15:38:08,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:08,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:38:08,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:38:08,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:38:08,771 INFO L87 Difference]: Start difference. First operand 292 states and 759 transitions. Second operand has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:10,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:10,126 INFO L93 Difference]: Finished difference Result 451 states and 1030 transitions. [2022-01-18 15:38:10,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:38:10,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:10,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:10,128 INFO L225 Difference]: With dead ends: 451 [2022-01-18 15:38:10,128 INFO L226 Difference]: Without dead ends: 423 [2022-01-18 15:38:10,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:38:10,128 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 139 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:10,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 304 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 771 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-01-18 15:38:10,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-18 15:38:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 295. [2022-01-18 15:38:10,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:10,132 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:10,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:10,132 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:10,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:10,132 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:10,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:10,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:10,132 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:10,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-01-18 15:38:10,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:10,333 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:10,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:10,333 INFO L85 PathProgramCache]: Analyzing trace with hash 144586099, now seen corresponding path program 376 times [2022-01-18 15:38:10,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:10,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759271229] [2022-01-18 15:38:10,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:10,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:10,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759271229] [2022-01-18 15:38:10,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759271229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:10,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430541331] [2022-01-18 15:38:10,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:38:10,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:10,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:10,485 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:10,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-01-18 15:38:10,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:38:10,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:10,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:10,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:10,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:10,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:10,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:10,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:10,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:10,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:11,285 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:11,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 104 [2022-01-18 15:38:11,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 15:38:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:11,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430541331] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:11,307 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:11,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 20 [2022-01-18 15:38:11,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390618506] [2022-01-18 15:38:11,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:11,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:38:11,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:11,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:38:11,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:38:11,308 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:11,649 INFO L93 Difference]: Finished difference Result 368 states and 895 transitions. [2022-01-18 15:38:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:38:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:11,650 INFO L225 Difference]: With dead ends: 368 [2022-01-18 15:38:11,650 INFO L226 Difference]: Without dead ends: 361 [2022-01-18 15:38:11,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:38:11,650 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 48 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:11,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 242 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 462 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-01-18 15:38:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-18 15:38:11,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 295. [2022-01-18 15:38:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:11,653 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:11,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:11,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:11,653 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:11,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-01-18 15:38:11,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:11,854 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:11,854 INFO L85 PathProgramCache]: Analyzing trace with hash -426868707, now seen corresponding path program 377 times [2022-01-18 15:38:11,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:11,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642394285] [2022-01-18 15:38:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:11,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:12,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642394285] [2022-01-18 15:38:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642394285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578430031] [2022-01-18 15:38:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:38:12,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:12,047 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-01-18 15:38:12,072 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:38:12,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:12,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:12,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:12,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:12,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:38:12,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:12,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:38:12,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:12,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:12,950 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:12,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:38:12,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:38:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:12,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578430031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:12,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:12,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 22 [2022-01-18 15:38:12,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692474528] [2022-01-18 15:38:12,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:12,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:38:12,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:12,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:38:12,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:38:12,974 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:13,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:13,297 INFO L93 Difference]: Finished difference Result 383 states and 916 transitions. [2022-01-18 15:38:13,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:38:13,297 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:13,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:13,298 INFO L225 Difference]: With dead ends: 383 [2022-01-18 15:38:13,298 INFO L226 Difference]: Without dead ends: 376 [2022-01-18 15:38:13,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:38:13,298 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:13,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 297 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 626 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-01-18 15:38:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-18 15:38:13,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 295. [2022-01-18 15:38:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:13,301 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:13,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:13,302 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:13,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:13,302 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:13,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:13,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:13,302 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:13,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-01-18 15:38:13,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-01-18 15:38:13,502 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:13,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:13,503 INFO L85 PathProgramCache]: Analyzing trace with hash -852645637, now seen corresponding path program 378 times [2022-01-18 15:38:13,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:13,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002134948] [2022-01-18 15:38:13,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:13,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:13,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002134948] [2022-01-18 15:38:13,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002134948] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:13,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145649638] [2022-01-18 15:38:13,760 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:38:13,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:13,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:13,761 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:13,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-01-18 15:38:13,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:38:13,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:13,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:13,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:14,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:14,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:38:14,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:14,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:38:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:14,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:14,783 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:14,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:38:14,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:38:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:14,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145649638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:14,856 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:14,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:38:14,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214005379] [2022-01-18 15:38:14,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:14,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:38:14,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:14,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:38:14,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:38:14,856 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:15,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:15,741 INFO L93 Difference]: Finished difference Result 378 states and 913 transitions. [2022-01-18 15:38:15,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:38:15,742 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:15,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:15,742 INFO L225 Difference]: With dead ends: 378 [2022-01-18 15:38:15,742 INFO L226 Difference]: Without dead ends: 364 [2022-01-18 15:38:15,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=184, Invalid=1538, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:38:15,755 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 69 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:15,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 227 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 677 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-18 15:38:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-18 15:38:15,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 295. [2022-01-18 15:38:15,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:15,759 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:15,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:15,759 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:15,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:15,759 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:15,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:15,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:15,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:15,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Ended with exit code 0 [2022-01-18 15:38:15,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable398,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:15,960 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:15,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash -868106433, now seen corresponding path program 379 times [2022-01-18 15:38:15,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:15,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390000889] [2022-01-18 15:38:15,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:15,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:16,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390000889] [2022-01-18 15:38:16,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390000889] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:16,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540998307] [2022-01-18 15:38:16,202 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:38:16,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:16,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:16,203 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:16,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-01-18 15:38:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:16,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:16,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:16,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:38:16,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:16,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:38:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:16,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:17,221 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:17,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 114 [2022-01-18 15:38:17,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 81 [2022-01-18 15:38:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:17,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540998307] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:17,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:17,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 28 [2022-01-18 15:38:17,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468071122] [2022-01-18 15:38:17,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:17,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:38:17,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:38:17,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:38:17,301 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:18,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:18,165 INFO L93 Difference]: Finished difference Result 371 states and 902 transitions. [2022-01-18 15:38:18,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:18,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:18,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:18,166 INFO L225 Difference]: With dead ends: 371 [2022-01-18 15:38:18,166 INFO L226 Difference]: Without dead ends: 357 [2022-01-18 15:38:18,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=167, Invalid=1393, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:38:18,166 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:18,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 272 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 696 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2022-01-18 15:38:18,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-18 15:38:18,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 295. [2022-01-18 15:38:18,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:18,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:18,170 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:18,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:18,170 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:18,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 28 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:18,170 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:18,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:18,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:18,170 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:18,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:18,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-01-18 15:38:18,379 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:18,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:18,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1439561239, now seen corresponding path program 380 times [2022-01-18 15:38:18,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348189037] [2022-01-18 15:38:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:18,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:18,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:18,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348189037] [2022-01-18 15:38:18,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348189037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:18,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699308399] [2022-01-18 15:38:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:38:18,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:18,539 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:18,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-01-18 15:38:18,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:38:18,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:18,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:38:18,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:19,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:19,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 147 treesize of output 127 [2022-01-18 15:38:19,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:19,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 107 [2022-01-18 15:38:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:19,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:20,041 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:20,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 210 treesize of output 175 [2022-01-18 15:38:20,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 130 [2022-01-18 15:38:20,150 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:20,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699308399] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:20,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:20,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-01-18 15:38:20,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323356316] [2022-01-18 15:38:20,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:20,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:38:20,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:20,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:38:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:38:20,151 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:20,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:20,628 INFO L93 Difference]: Finished difference Result 358 states and 884 transitions. [2022-01-18 15:38:20,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:38:20,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:20,629 INFO L225 Difference]: With dead ends: 358 [2022-01-18 15:38:20,629 INFO L226 Difference]: Without dead ends: 344 [2022-01-18 15:38:20,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=1116, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:38:20,629 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 39 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:20,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 241 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 295 Invalid, 0 Unknown, 120 Unchecked, 0.1s Time] [2022-01-18 15:38:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-18 15:38:20,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 295. [2022-01-18 15:38:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:20,632 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:20,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:20,632 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:20,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:20,632 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:20,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:20,633 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:20,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:20,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-01-18 15:38:20,849 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:20,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:20,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1187529473, now seen corresponding path program 381 times [2022-01-18 15:38:20,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:20,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121323440] [2022-01-18 15:38:20,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:20,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:20,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:20,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:20,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:20,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121323440] [2022-01-18 15:38:20,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121323440] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:20,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951340736] [2022-01-18 15:38:20,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:38:20,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:20,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:20,958 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:20,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-01-18 15:38:20,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:38:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:20,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:38:20,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:21,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:38:21,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:38:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:21,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:21,271 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:21,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:38:21,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:38:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:21,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951340736] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:21,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:21,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-18 15:38:21,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51626197] [2022-01-18 15:38:21,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:21,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:38:21,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:21,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:38:21,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:38:21,302 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:21,497 INFO L93 Difference]: Finished difference Result 405 states and 965 transitions. [2022-01-18 15:38:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:21,497 INFO L225 Difference]: With dead ends: 405 [2022-01-18 15:38:21,497 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 15:38:21,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:38:21,498 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:21,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 222 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 354 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2022-01-18 15:38:21,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 15:38:21,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 297. [2022-01-18 15:38:21,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.6283783783783785) internal successors, (778), 296 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:21,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 778 transitions. [2022-01-18 15:38:21,501 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 778 transitions. Word has length 18 [2022-01-18 15:38:21,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:21,501 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 778 transitions. [2022-01-18 15:38:21,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:21,501 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 778 transitions. [2022-01-18 15:38:21,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:21,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:21,502 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:21,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-01-18 15:38:21,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-01-18 15:38:21,711 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:21,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:21,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1974791041, now seen corresponding path program 382 times [2022-01-18 15:38:21,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:21,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293784241] [2022-01-18 15:38:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:21,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:21,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293784241] [2022-01-18 15:38:21,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293784241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:21,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740208982] [2022-01-18 15:38:21,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:38:21,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:21,879 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:21,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-01-18 15:38:21,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:38:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:21,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:22,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:22,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:38:22,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:22,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:38:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:22,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:22,892 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:22,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:38:22,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:38:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:38:22,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740208982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:22,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:22,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 24 [2022-01-18 15:38:22,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826341828] [2022-01-18 15:38:22,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:22,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:38:22,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:22,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:38:22,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:38:22,914 INFO L87 Difference]: Start difference. First operand 297 states and 778 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:23,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:23,262 INFO L93 Difference]: Finished difference Result 373 states and 901 transitions. [2022-01-18 15:38:23,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:38:23,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:23,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:23,263 INFO L225 Difference]: With dead ends: 373 [2022-01-18 15:38:23,263 INFO L226 Difference]: Without dead ends: 366 [2022-01-18 15:38:23,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:38:23,263 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 56 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:23,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 337 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 642 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-18 15:38:23,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-18 15:38:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 297. [2022-01-18 15:38:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.6283783783783785) internal successors, (778), 296 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:23,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 778 transitions. [2022-01-18 15:38:23,267 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 778 transitions. Word has length 18 [2022-01-18 15:38:23,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:23,267 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 778 transitions. [2022-01-18 15:38:23,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:23,267 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 778 transitions. [2022-01-18 15:38:23,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:23,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:23,267 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:23,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:23,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable402,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:23,468 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:23,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:23,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2031726667, now seen corresponding path program 383 times [2022-01-18 15:38:23,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:23,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202294270] [2022-01-18 15:38:23,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:23,468 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:23,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:23,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202294270] [2022-01-18 15:38:23,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202294270] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:23,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105195407] [2022-01-18 15:38:23,590 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:38:23,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:23,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:23,590 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:23,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-01-18 15:38:23,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:38:23,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:23,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 15:38:23,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:23,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 38 [2022-01-18 15:38:23,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2022-01-18 15:38:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:23,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:23,904 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:23,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-01-18 15:38:23,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-18 15:38:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:23,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105195407] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:23,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:23,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-18 15:38:23,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262782650] [2022-01-18 15:38:23,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:23,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:38:23,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:38:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:38:23,936 INFO L87 Difference]: Start difference. First operand 297 states and 778 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:24,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:24,155 INFO L93 Difference]: Finished difference Result 328 states and 836 transitions. [2022-01-18 15:38:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:38:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:24,156 INFO L225 Difference]: With dead ends: 328 [2022-01-18 15:38:24,156 INFO L226 Difference]: Without dead ends: 328 [2022-01-18 15:38:24,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:38:24,156 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:24,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 125 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 297 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:38:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-18 15:38:24,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 295. [2022-01-18 15:38:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.622448979591837) internal successors, (771), 294 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 771 transitions. [2022-01-18 15:38:24,159 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 771 transitions. Word has length 18 [2022-01-18 15:38:24,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:24,159 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 771 transitions. [2022-01-18 15:38:24,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 20 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:24,159 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 771 transitions. [2022-01-18 15:38:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:24,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:24,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:24,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Ended with exit code 0 [2022-01-18 15:38:24,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:24,360 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:24,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:24,360 INFO L85 PathProgramCache]: Analyzing trace with hash 2113624239, now seen corresponding path program 384 times [2022-01-18 15:38:24,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:24,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990611060] [2022-01-18 15:38:24,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:24,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:24,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:24,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990611060] [2022-01-18 15:38:24,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990611060] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:24,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384440467] [2022-01-18 15:38:24,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:38:24,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:24,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:24,634 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:24,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-01-18 15:38:24,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:38:24,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:24,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:38:24,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:25,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:25,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:25,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:25,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:25,203 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:25,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:25,781 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:25,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 138 treesize of output 115 [2022-01-18 15:38:25,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2022-01-18 15:38:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:25,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384440467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:25,800 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:25,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:38:25,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811445454] [2022-01-18 15:38:25,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:25,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:25,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:25,800 INFO L87 Difference]: Start difference. First operand 295 states and 771 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:26,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:26,527 INFO L93 Difference]: Finished difference Result 416 states and 994 transitions. [2022-01-18 15:38:26,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:26,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:26,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:26,528 INFO L225 Difference]: With dead ends: 416 [2022-01-18 15:38:26,528 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 15:38:26,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:38:26,529 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:26,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 264 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 691 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-01-18 15:38:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 15:38:26,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2022-01-18 15:38:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6447368421052633) internal successors, (804), 304 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:26,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 804 transitions. [2022-01-18 15:38:26,532 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 804 transitions. Word has length 18 [2022-01-18 15:38:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:26,532 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 804 transitions. [2022-01-18 15:38:26,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 804 transitions. [2022-01-18 15:38:26,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:26,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:26,532 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:26,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-01-18 15:38:26,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:26,733 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:26,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:26,733 INFO L85 PathProgramCache]: Analyzing trace with hash 2098163443, now seen corresponding path program 385 times [2022-01-18 15:38:26,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:26,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335022326] [2022-01-18 15:38:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:26,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:26,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335022326] [2022-01-18 15:38:26,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335022326] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:26,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181565161] [2022-01-18 15:38:26,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:38:26,990 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:26,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:26,991 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:26,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-01-18 15:38:27,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:27,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:27,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:27,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:27,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:27,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:27,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:28,084 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:28,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:38:28,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:38:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:28,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181565161] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:28,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:28,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:38:28,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201923834] [2022-01-18 15:38:28,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:28,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:38:28,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:28,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:38:28,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:38:28,104 INFO L87 Difference]: Start difference. First operand 305 states and 804 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:28,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:28,882 INFO L93 Difference]: Finished difference Result 420 states and 999 transitions. [2022-01-18 15:38:28,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:28,883 INFO L225 Difference]: With dead ends: 420 [2022-01-18 15:38:28,883 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 15:38:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=1193, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:38:28,883 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 100 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 243 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:28,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 301 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 670 Invalid, 0 Unknown, 243 Unchecked, 0.3s Time] [2022-01-18 15:38:28,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 15:38:28,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 305. [2022-01-18 15:38:28,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6447368421052633) internal successors, (804), 304 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 804 transitions. [2022-01-18 15:38:28,886 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 804 transitions. Word has length 18 [2022-01-18 15:38:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 804 transitions. [2022-01-18 15:38:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 804 transitions. [2022-01-18 15:38:28,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:28,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:28,887 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:28,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:29,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable405,389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:29,087 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:29,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:29,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1526708637, now seen corresponding path program 386 times [2022-01-18 15:38:29,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109214371] [2022-01-18 15:38:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:29,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:29,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:29,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109214371] [2022-01-18 15:38:29,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109214371] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486335419] [2022-01-18 15:38:29,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:38:29,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:29,315 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:29,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-01-18 15:38:29,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:38:29,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:29,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:29,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:29,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:38:29,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:29,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:38:29,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:29,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:30,495 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:30,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:38:30,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:38:30,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486335419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:30,514 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:30,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:38:30,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902217537] [2022-01-18 15:38:30,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:30,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:30,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:30,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:30,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:30,515 INFO L87 Difference]: Start difference. First operand 305 states and 804 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:30,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:30,978 INFO L93 Difference]: Finished difference Result 405 states and 975 transitions. [2022-01-18 15:38:30,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:38:30,979 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:30,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:30,979 INFO L225 Difference]: With dead ends: 405 [2022-01-18 15:38:30,979 INFO L226 Difference]: Without dead ends: 398 [2022-01-18 15:38:30,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:38:30,980 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 98 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:30,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 285 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 589 Invalid, 0 Unknown, 223 Unchecked, 0.2s Time] [2022-01-18 15:38:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-01-18 15:38:30,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 303. [2022-01-18 15:38:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6390728476821192) internal successors, (797), 302 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 797 transitions. [2022-01-18 15:38:30,983 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 797 transitions. Word has length 18 [2022-01-18 15:38:30,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:30,983 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 797 transitions. [2022-01-18 15:38:30,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:30,983 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 797 transitions. [2022-01-18 15:38:30,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:30,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:30,983 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:30,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:31,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:31,184 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:31,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:31,184 INFO L85 PathProgramCache]: Analyzing trace with hash 991478835, now seen corresponding path program 387 times [2022-01-18 15:38:31,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306597613] [2022-01-18 15:38:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:31,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:31,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:31,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306597613] [2022-01-18 15:38:31,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306597613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:31,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839491970] [2022-01-18 15:38:31,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:38:31,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:31,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:31,381 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:31,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-01-18 15:38:31,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:38:31,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:31,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:31,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:31,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:38:31,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:31,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:38:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:31,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:32,586 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:32,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:38:32,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:38:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:32,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839491970] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:32,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:32,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:38:32,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290249674] [2022-01-18 15:38:32,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:32,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:32,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:32,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:32,605 INFO L87 Difference]: Start difference. First operand 303 states and 797 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:32,923 INFO L93 Difference]: Finished difference Result 398 states and 952 transitions. [2022-01-18 15:38:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:32,924 INFO L225 Difference]: With dead ends: 398 [2022-01-18 15:38:32,924 INFO L226 Difference]: Without dead ends: 391 [2022-01-18 15:38:32,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:38:32,925 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:32,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 371 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 663 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-01-18 15:38:32,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-01-18 15:38:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 301. [2022-01-18 15:38:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.6333333333333333) internal successors, (790), 300 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:32,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 790 transitions. [2022-01-18 15:38:32,928 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 790 transitions. Word has length 18 [2022-01-18 15:38:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:32,928 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 790 transitions. [2022-01-18 15:38:32,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:32,928 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 790 transitions. [2022-01-18 15:38:32,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:32,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:32,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:32,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:33,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-01-18 15:38:33,129 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:33,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:33,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1579224157, now seen corresponding path program 388 times [2022-01-18 15:38:33,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:33,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844671333] [2022-01-18 15:38:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:33,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:33,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844671333] [2022-01-18 15:38:33,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844671333] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:33,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405896209] [2022-01-18 15:38:33,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:38:33,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:33,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:33,398 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:33,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-01-18 15:38:33,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:38:33,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:33,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:33,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:33,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:33,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:38:33,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:33,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:38:33,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:33,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:34,591 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:34,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:38:34,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:38:34,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:34,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405896209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:34,609 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:34,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:38:34,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816586761] [2022-01-18 15:38:34,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:38:34,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:38:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:38:34,610 INFO L87 Difference]: Start difference. First operand 301 states and 790 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:34,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:34,971 INFO L93 Difference]: Finished difference Result 414 states and 969 transitions. [2022-01-18 15:38:34,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:34,972 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:34,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:34,972 INFO L225 Difference]: With dead ends: 414 [2022-01-18 15:38:34,972 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 15:38:34,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:38:34,973 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 70 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:34,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 396 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 707 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-01-18 15:38:34,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 15:38:34,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 298. [2022-01-18 15:38:34,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.6262626262626263) internal successors, (780), 297 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:34,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 780 transitions. [2022-01-18 15:38:34,976 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 780 transitions. Word has length 18 [2022-01-18 15:38:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:34,976 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 780 transitions. [2022-01-18 15:38:34,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:34,976 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 780 transitions. [2022-01-18 15:38:34,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:34,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:34,976 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:34,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-01-18 15:38:35,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:35,177 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1382209471, now seen corresponding path program 389 times [2022-01-18 15:38:35,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354467334] [2022-01-18 15:38:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:35,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:35,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:35,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354467334] [2022-01-18 15:38:35,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354467334] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:35,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862358651] [2022-01-18 15:38:35,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:38:35,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:35,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:35,402 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:35,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-01-18 15:38:35,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:38:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:35,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:35,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 136 treesize of output 116 [2022-01-18 15:38:35,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:35,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 96 [2022-01-18 15:38:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:35,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:36,450 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:36,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 140 treesize of output 117 [2022-01-18 15:38:36,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 84 [2022-01-18 15:38:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862358651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:36,474 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:36,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:38:36,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994442] [2022-01-18 15:38:36,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:36,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:38:36,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:38:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:38:36,475 INFO L87 Difference]: Start difference. First operand 298 states and 780 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:37,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:37,131 INFO L93 Difference]: Finished difference Result 488 states and 1139 transitions. [2022-01-18 15:38:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:38:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:37,132 INFO L225 Difference]: With dead ends: 488 [2022-01-18 15:38:37,133 INFO L226 Difference]: Without dead ends: 481 [2022-01-18 15:38:37,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:38:37,133 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 78 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:37,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 407 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:38:37,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-01-18 15:38:37,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 308. [2022-01-18 15:38:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.6482084690553744) internal successors, (813), 307 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:37,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 813 transitions. [2022-01-18 15:38:37,137 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 813 transitions. Word has length 18 [2022-01-18 15:38:37,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:37,137 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 813 transitions. [2022-01-18 15:38:37,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:37,137 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 813 transitions. [2022-01-18 15:38:37,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:37,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:37,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:37,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Ended with exit code 0 [2022-01-18 15:38:37,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:37,338 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1764929859, now seen corresponding path program 390 times [2022-01-18 15:38:37,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:37,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287234433] [2022-01-18 15:38:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:37,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:37,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:37,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:37,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287234433] [2022-01-18 15:38:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287234433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:37,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914578512] [2022-01-18 15:38:37,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:38:37,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:37,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:37,703 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:37,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-01-18 15:38:37,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:38:37,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:37,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:38:37,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:38,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:38,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:38:38,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:38,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:38:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:38,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:38,755 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:38,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:38:38,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:38:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:38,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914578512] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:38,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:38,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:38:38,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155090729] [2022-01-18 15:38:38,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:38,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:38,779 INFO L87 Difference]: Start difference. First operand 308 states and 813 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:40,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:40,108 INFO L93 Difference]: Finished difference Result 533 states and 1242 transitions. [2022-01-18 15:38:40,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:38:40,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:40,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:40,109 INFO L225 Difference]: With dead ends: 533 [2022-01-18 15:38:40,109 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 15:38:40,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:38:40,110 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:40,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 406 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 15:38:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 15:38:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 320. [2022-01-18 15:38:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6739811912225706) internal successors, (853), 319 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 853 transitions. [2022-01-18 15:38:40,113 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 853 transitions. Word has length 18 [2022-01-18 15:38:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:40,114 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 853 transitions. [2022-01-18 15:38:40,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 853 transitions. [2022-01-18 15:38:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:40,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:40,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:40,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:40,314 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2022-01-18 15:38:40,314 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:40,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:40,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1409312961, now seen corresponding path program 391 times [2022-01-18 15:38:40,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:40,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217432652] [2022-01-18 15:38:40,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:40,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:40,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:40,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217432652] [2022-01-18 15:38:40,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217432652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484136860] [2022-01-18 15:38:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:38:40,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:40,499 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:40,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-01-18 15:38:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:40,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:40,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:38:40,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:40,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:38:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:40,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:41,372 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:41,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 101 [2022-01-18 15:38:41,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 72 [2022-01-18 15:38:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:41,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484136860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:41,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:41,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:38:41,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48592043] [2022-01-18 15:38:41,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:41,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:38:41,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:41,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:38:41,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:38:41,395 INFO L87 Difference]: Start difference. First operand 320 states and 853 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:42,277 INFO L93 Difference]: Finished difference Result 526 states and 1213 transitions. [2022-01-18 15:38:42,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:38:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:42,278 INFO L225 Difference]: With dead ends: 526 [2022-01-18 15:38:42,278 INFO L226 Difference]: Without dead ends: 512 [2022-01-18 15:38:42,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=169, Invalid=1237, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:38:42,279 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 118 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:42,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 349 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:38:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-18 15:38:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 322. [2022-01-18 15:38:42,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.682242990654206) internal successors, (861), 321 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 861 transitions. [2022-01-18 15:38:42,283 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 861 transitions. Word has length 18 [2022-01-18 15:38:42,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:42,283 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 861 transitions. [2022-01-18 15:38:42,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:42,283 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 861 transitions. [2022-01-18 15:38:42,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:42,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:42,283 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:42,299 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-01-18 15:38:42,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-01-18 15:38:42,484 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:42,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:42,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1424773757, now seen corresponding path program 392 times [2022-01-18 15:38:42,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:42,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522027698] [2022-01-18 15:38:42,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:42,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:42,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:42,681 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:42,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:42,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522027698] [2022-01-18 15:38:42,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522027698] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:42,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101028611] [2022-01-18 15:38:42,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:38:42,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:42,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:42,683 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:42,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-01-18 15:38:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:38:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:38:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:42,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:42,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:38:42,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:42,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:38:43,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:43,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:44,325 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:44,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 204 treesize of output 177 [2022-01-18 15:38:44,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 140 [2022-01-18 15:38:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:44,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101028611] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:44,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:44,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:38:44,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174681892] [2022-01-18 15:38:44,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:44,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:38:44,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:44,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:38:44,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:38:44,393 INFO L87 Difference]: Start difference. First operand 322 states and 861 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:47,244 INFO L93 Difference]: Finished difference Result 557 states and 1264 transitions. [2022-01-18 15:38:47,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-18 15:38:47,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:47,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:47,245 INFO L225 Difference]: With dead ends: 557 [2022-01-18 15:38:47,245 INFO L226 Difference]: Without dead ends: 522 [2022-01-18 15:38:47,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 15:38:47,245 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 119 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:47,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 523 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1309 Invalid, 0 Unknown, 17 Unchecked, 0.6s Time] [2022-01-18 15:38:47,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2022-01-18 15:38:47,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 319. [2022-01-18 15:38:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.6792452830188678) internal successors, (852), 318 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 852 transitions. [2022-01-18 15:38:47,249 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 852 transitions. Word has length 18 [2022-01-18 15:38:47,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:47,249 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 852 transitions. [2022-01-18 15:38:47,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:47,249 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 852 transitions. [2022-01-18 15:38:47,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:47,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:47,250 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:47,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:47,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable412,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:47,453 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:47,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1346294337, now seen corresponding path program 393 times [2022-01-18 15:38:47,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:47,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705442716] [2022-01-18 15:38:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:47,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:47,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705442716] [2022-01-18 15:38:47,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705442716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:47,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829929541] [2022-01-18 15:38:47,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:38:47,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:47,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:47,642 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:47,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-01-18 15:38:47,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:38:47,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:47,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:47,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:47,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:47,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:47,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:47,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:48,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:48,449 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:48,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:38:48,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:38:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:48,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829929541] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:48,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:48,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:38:48,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729068874] [2022-01-18 15:38:48,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:48,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:38:48,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:48,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:38:48,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:38:48,474 INFO L87 Difference]: Start difference. First operand 319 states and 852 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:48,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:48,921 INFO L93 Difference]: Finished difference Result 433 states and 1057 transitions. [2022-01-18 15:38:48,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:48,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:48,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:48,922 INFO L225 Difference]: With dead ends: 433 [2022-01-18 15:38:48,922 INFO L226 Difference]: Without dead ends: 426 [2022-01-18 15:38:48,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:38:48,922 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 71 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:48,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 222 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 668 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-18 15:38:48,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-01-18 15:38:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 319. [2022-01-18 15:38:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.6792452830188678) internal successors, (852), 318 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:48,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 852 transitions. [2022-01-18 15:38:48,926 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 852 transitions. Word has length 18 [2022-01-18 15:38:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:48,926 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 852 transitions. [2022-01-18 15:38:48,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 852 transitions. [2022-01-18 15:38:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:48,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:48,926 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:48,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-01-18 15:38:49,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable413 [2022-01-18 15:38:49,127 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:49,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:49,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1361755133, now seen corresponding path program 394 times [2022-01-18 15:38:49,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:49,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712785112] [2022-01-18 15:38:49,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:49,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:49,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712785112] [2022-01-18 15:38:49,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712785112] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:49,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244273117] [2022-01-18 15:38:49,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:38:49,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:49,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:49,346 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:49,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-01-18 15:38:49,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:38:49,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:49,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:49,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:49,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:49,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:49,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:49,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:49,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:49,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:50,149 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:50,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:38:50,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:38:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:50,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244273117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:50,173 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:50,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:38:50,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615274411] [2022-01-18 15:38:50,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:50,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:38:50,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:50,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:38:50,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:38:50,174 INFO L87 Difference]: Start difference. First operand 319 states and 852 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:50,897 INFO L93 Difference]: Finished difference Result 404 states and 1013 transitions. [2022-01-18 15:38:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:50,897 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:50,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:50,898 INFO L225 Difference]: With dead ends: 404 [2022-01-18 15:38:50,898 INFO L226 Difference]: Without dead ends: 397 [2022-01-18 15:38:50,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=864, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:38:50,898 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:50,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 234 Invalid, 718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 678 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-01-18 15:38:50,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-01-18 15:38:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 319. [2022-01-18 15:38:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.6792452830188678) internal successors, (852), 318 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 852 transitions. [2022-01-18 15:38:50,901 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 852 transitions. Word has length 18 [2022-01-18 15:38:50,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:50,901 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 852 transitions. [2022-01-18 15:38:50,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:50,902 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 852 transitions. [2022-01-18 15:38:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:50,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:50,902 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:50,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:51,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-01-18 15:38:51,102 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1933209939, now seen corresponding path program 395 times [2022-01-18 15:38:51,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853568433] [2022-01-18 15:38:51,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:51,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:51,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853568433] [2022-01-18 15:38:51,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853568433] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:51,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386086725] [2022-01-18 15:38:51,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:38:51,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:51,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:51,279 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:51,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-01-18 15:38:51,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:38:51,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:51,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:51,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:51,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:38:51,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:51,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:38:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:51,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:52,176 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:38:52,177 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 101 [2022-01-18 15:38:52,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 78 [2022-01-18 15:38:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:52,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386086725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:52,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:52,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:38:52,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787875555] [2022-01-18 15:38:52,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:52,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:38:52,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:52,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:38:52,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:38:52,201 INFO L87 Difference]: Start difference. First operand 319 states and 852 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:52,468 INFO L93 Difference]: Finished difference Result 418 states and 1036 transitions. [2022-01-18 15:38:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:52,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:52,469 INFO L225 Difference]: With dead ends: 418 [2022-01-18 15:38:52,469 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 15:38:52,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:38:52,469 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 39 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:52,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 217 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 435 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-18 15:38:52,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 15:38:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 319. [2022-01-18 15:38:52,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.6792452830188678) internal successors, (852), 318 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:52,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 852 transitions. [2022-01-18 15:38:52,472 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 852 transitions. Word has length 18 [2022-01-18 15:38:52,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:52,472 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 852 transitions. [2022-01-18 15:38:52,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 852 transitions. [2022-01-18 15:38:52,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:52,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:52,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:52,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-01-18 15:38:52,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable415 [2022-01-18 15:38:52,673 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:52,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:52,673 INFO L85 PathProgramCache]: Analyzing trace with hash 607283007, now seen corresponding path program 396 times [2022-01-18 15:38:52,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:52,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541226013] [2022-01-18 15:38:52,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:52,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:52,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:52,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541226013] [2022-01-18 15:38:52,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541226013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:52,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181916727] [2022-01-18 15:38:52,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:38:52,866 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:52,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:52,867 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:52,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-01-18 15:38:52,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:38:52,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:38:52,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:53,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:53,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:53,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:53,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:53,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:54,609 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:54,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 191 treesize of output 168 [2022-01-18 15:38:54,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 135 [2022-01-18 15:38:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:54,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181916727] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:54,715 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:54,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:38:54,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570605325] [2022-01-18 15:38:54,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:54,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:38:54,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:54,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:38:54,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:38:54,716 INFO L87 Difference]: Start difference. First operand 319 states and 852 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:56,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:56,808 INFO L93 Difference]: Finished difference Result 418 states and 1046 transitions. [2022-01-18 15:38:56,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:38:56,808 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:56,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:56,809 INFO L225 Difference]: With dead ends: 418 [2022-01-18 15:38:56,809 INFO L226 Difference]: Without dead ends: 404 [2022-01-18 15:38:56,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:38:56,809 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 48 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:56,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 130 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 437 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-18 15:38:56,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-18 15:38:56,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 321. [2022-01-18 15:38:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.68125) internal successors, (858), 320 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:56,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 858 transitions. [2022-01-18 15:38:56,813 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 858 transitions. Word has length 18 [2022-01-18 15:38:56,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:56,813 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 858 transitions. [2022-01-18 15:38:56,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:56,813 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 858 transitions. [2022-01-18 15:38:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:56,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:56,813 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:56,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Forceful destruction successful, exit code 0 [2022-01-18 15:38:57,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:57,014 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:57,014 INFO L85 PathProgramCache]: Analyzing trace with hash 591822211, now seen corresponding path program 397 times [2022-01-18 15:38:57,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:57,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569027437] [2022-01-18 15:38:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:57,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:57,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:57,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:57,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569027437] [2022-01-18 15:38:57,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569027437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:57,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708170809] [2022-01-18 15:38:57,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:38:57,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:57,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:57,214 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:57,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-01-18 15:38:57,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:57,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:57,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:57,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:57,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:38:57,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:57,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:38:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:57,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:58,113 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:58,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:38:58,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:38:58,147 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:58,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708170809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:58,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:58,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:38:58,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124337636] [2022-01-18 15:38:58,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:58,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:38:58,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:58,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:38:58,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:38:58,147 INFO L87 Difference]: Start difference. First operand 321 states and 858 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:58,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:38:58,492 INFO L93 Difference]: Finished difference Result 377 states and 971 transitions. [2022-01-18 15:38:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:38:58,493 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:38:58,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:38:58,493 INFO L225 Difference]: With dead ends: 377 [2022-01-18 15:38:58,493 INFO L226 Difference]: Without dead ends: 370 [2022-01-18 15:38:58,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:38:58,494 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:38:58,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 120 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 389 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-01-18 15:38:58,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-01-18 15:38:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 321. [2022-01-18 15:38:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.68125) internal successors, (858), 320 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:58,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 858 transitions. [2022-01-18 15:38:58,497 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 858 transitions. Word has length 18 [2022-01-18 15:38:58,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:38:58,497 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 858 transitions. [2022-01-18 15:38:58,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:38:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 858 transitions. [2022-01-18 15:38:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:38:58,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:38:58,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:38:58,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-01-18 15:38:58,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2022-01-18 15:38:58,698 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:38:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:38:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash 20367405, now seen corresponding path program 398 times [2022-01-18 15:38:58,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:38:58,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152645809] [2022-01-18 15:38:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:38:58,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:38:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:38:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:58,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:38:58,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152645809] [2022-01-18 15:38:58,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152645809] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:38:58,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485017685] [2022-01-18 15:38:58,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:38:58,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:38:58,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:38:58,921 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:38:58,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-01-18 15:38:58,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:38:58,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:38:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:38:58,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:38:59,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:59,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:38:59,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:38:59,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:38:59,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:59,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:38:59,921 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:38:59,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:38:59,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:38:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:38:59,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485017685] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:38:59,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:38:59,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:38:59,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126880125] [2022-01-18 15:38:59,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:38:59,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:38:59,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:38:59,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:38:59,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:38:59,942 INFO L87 Difference]: Start difference. First operand 321 states and 858 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:00,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:00,226 INFO L93 Difference]: Finished difference Result 376 states and 966 transitions. [2022-01-18 15:39:00,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:39:00,226 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:00,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:00,227 INFO L225 Difference]: With dead ends: 376 [2022-01-18 15:39:00,227 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 15:39:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:39:00,227 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:00,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 127 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 396 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-01-18 15:39:00,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 15:39:00,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 320. [2022-01-18 15:39:00,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6802507836990594) internal successors, (855), 319 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:00,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 855 transitions. [2022-01-18 15:39:00,230 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 855 transitions. Word has length 18 [2022-01-18 15:39:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:00,230 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 855 transitions. [2022-01-18 15:39:00,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 855 transitions. [2022-01-18 15:39:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:00,231 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:00,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:00,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-01-18 15:39:00,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:00,431 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:00,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:00,431 INFO L85 PathProgramCache]: Analyzing trace with hash -514862397, now seen corresponding path program 399 times [2022-01-18 15:39:00,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:00,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947992471] [2022-01-18 15:39:00,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:00,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:00,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947992471] [2022-01-18 15:39:00,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947992471] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:00,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431764877] [2022-01-18 15:39:00,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:00,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:00,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:00,595 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:00,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-01-18 15:39:00,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:39:00,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:00,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:00,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:39:00,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:00,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:39:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:01,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:01,627 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:01,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:01,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:01,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:01,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431764877] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:01,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:01,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:39:01,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514037057] [2022-01-18 15:39:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:01,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:01,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:01,650 INFO L87 Difference]: Start difference. First operand 320 states and 855 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:01,970 INFO L93 Difference]: Finished difference Result 376 states and 962 transitions. [2022-01-18 15:39:01,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:01,970 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:01,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:01,971 INFO L225 Difference]: With dead ends: 376 [2022-01-18 15:39:01,971 INFO L226 Difference]: Without dead ends: 369 [2022-01-18 15:39:01,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:39:01,971 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:01,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 453 Invalid, 0 Unknown, 130 Unchecked, 0.2s Time] [2022-01-18 15:39:01,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-18 15:39:01,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 319. [2022-01-18 15:39:01,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.6792452830188678) internal successors, (852), 318 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 852 transitions. [2022-01-18 15:39:01,974 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 852 transitions. Word has length 18 [2022-01-18 15:39:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:01,975 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 852 transitions. [2022-01-18 15:39:01,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 852 transitions. [2022-01-18 15:39:01,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:01,975 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:01,975 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:01,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Ended with exit code 0 [2022-01-18 15:39:02,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable419 [2022-01-18 15:39:02,176 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:02,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:02,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1183592847, now seen corresponding path program 400 times [2022-01-18 15:39:02,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:02,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748276262] [2022-01-18 15:39:02,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:02,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:02,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748276262] [2022-01-18 15:39:02,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748276262] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:02,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348842937] [2022-01-18 15:39:02,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:02,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:02,395 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:02,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-01-18 15:39:02,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:02,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:02,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:02,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:02,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:02,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 112 [2022-01-18 15:39:02,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:02,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 92 [2022-01-18 15:39:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:02,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:03,256 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:03,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:39:03,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:39:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:03,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348842937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:03,283 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:03,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 22 [2022-01-18 15:39:03,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488149937] [2022-01-18 15:39:03,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:03,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:03,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:03,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:03,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:03,284 INFO L87 Difference]: Start difference. First operand 319 states and 852 transitions. Second operand has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:03,787 INFO L93 Difference]: Finished difference Result 478 states and 1161 transitions. [2022-01-18 15:39:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:39:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:03,788 INFO L225 Difference]: With dead ends: 478 [2022-01-18 15:39:03,788 INFO L226 Difference]: Without dead ends: 471 [2022-01-18 15:39:03,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:03,788 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 72 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:03,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 281 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:39:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2022-01-18 15:39:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 333. [2022-01-18 15:39:03,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.6987951807228914) internal successors, (896), 332 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:03,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 896 transitions. [2022-01-18 15:39:03,792 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 896 transitions. Word has length 18 [2022-01-18 15:39:03,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:03,792 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 896 transitions. [2022-01-18 15:39:03,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8181818181818181) internal successors, (40), 22 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:03,792 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 896 transitions. [2022-01-18 15:39:03,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:03,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:03,793 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:03,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-01-18 15:39:03,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-01-18 15:39:03,993 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:03,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1990649973, now seen corresponding path program 401 times [2022-01-18 15:39:03,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:03,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688275674] [2022-01-18 15:39:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:03,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:04,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:04,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688275674] [2022-01-18 15:39:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688275674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:04,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610310552] [2022-01-18 15:39:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:39:04,140 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:04,140 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:04,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-01-18 15:39:04,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:39:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:04,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:04,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 139 treesize of output 117 [2022-01-18 15:39:04,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:04,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2022-01-18 15:39:04,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:04,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:04,901 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:04,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:39:04,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:39:04,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:04,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610310552] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:04,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:04,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 20 [2022-01-18 15:39:04,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126687702] [2022-01-18 15:39:04,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:04,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:04,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:04,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:04,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:04,928 INFO L87 Difference]: Start difference. First operand 333 states and 896 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:05,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:05,376 INFO L93 Difference]: Finished difference Result 491 states and 1181 transitions. [2022-01-18 15:39:05,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:39:05,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:05,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:05,377 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:39:05,377 INFO L226 Difference]: Without dead ends: 484 [2022-01-18 15:39:05,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:39:05,378 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:05,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 267 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:39:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-18 15:39:05,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 333. [2022-01-18 15:39:05,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.6987951807228914) internal successors, (896), 332 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:05,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 896 transitions. [2022-01-18 15:39:05,381 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 896 transitions. Word has length 18 [2022-01-18 15:39:05,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:05,381 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 896 transitions. [2022-01-18 15:39:05,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:05,382 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 896 transitions. [2022-01-18 15:39:05,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:05,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:05,382 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:05,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-01-18 15:39:05,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-01-18 15:39:05,582 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash -2006110769, now seen corresponding path program 402 times [2022-01-18 15:39:05,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:05,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868146663] [2022-01-18 15:39:05,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:05,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:05,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:05,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868146663] [2022-01-18 15:39:05,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868146663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:05,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147406056] [2022-01-18 15:39:05,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:39:05,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:05,743 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:05,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-01-18 15:39:05,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:39:05,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:05,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:05,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:39:05,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:05,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:39:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:06,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:06,495 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:06,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:39:06,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:39:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:06,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147406056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:06,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:06,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 20 [2022-01-18 15:39:06,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543088543] [2022-01-18 15:39:06,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:06,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:06,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:06,522 INFO L87 Difference]: Start difference. First operand 333 states and 896 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:07,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:07,063 INFO L93 Difference]: Finished difference Result 476 states and 1158 transitions. [2022-01-18 15:39:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:39:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:07,064 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:39:07,064 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:39:07,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:39:07,064 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:07,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 317 Invalid, 959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:39:07,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:39:07,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 331. [2022-01-18 15:39:07,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.693939393939394) internal successors, (889), 330 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 889 transitions. [2022-01-18 15:39:07,068 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 889 transitions. Word has length 18 [2022-01-18 15:39:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:07,068 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 889 transitions. [2022-01-18 15:39:07,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 889 transitions. [2022-01-18 15:39:07,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:07,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:07,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:07,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Ended with exit code 0 [2022-01-18 15:39:07,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-01-18 15:39:07,269 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:07,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:07,269 INFO L85 PathProgramCache]: Analyzing trace with hash -914938817, now seen corresponding path program 403 times [2022-01-18 15:39:07,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:07,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979701468] [2022-01-18 15:39:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:07,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:07,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979701468] [2022-01-18 15:39:07,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979701468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:07,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192307172] [2022-01-18 15:39:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:39:07,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:07,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:07,439 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:07,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-01-18 15:39:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:07,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:07,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:07,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:07,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:07,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:08,225 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:08,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:39:08,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:39:08,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:08,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192307172] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:08,253 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:08,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:39:08,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910007915] [2022-01-18 15:39:08,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:08,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:39:08,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:08,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:39:08,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:39:08,253 INFO L87 Difference]: Start difference. First operand 331 states and 889 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:08,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:08,839 INFO L93 Difference]: Finished difference Result 466 states and 1135 transitions. [2022-01-18 15:39:08,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:39:08,839 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:08,840 INFO L225 Difference]: With dead ends: 466 [2022-01-18 15:39:08,840 INFO L226 Difference]: Without dead ends: 459 [2022-01-18 15:39:08,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:39:08,840 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:08,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 232 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 651 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-01-18 15:39:08,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2022-01-18 15:39:08,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 334. [2022-01-18 15:39:08,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.7027027027027026) internal successors, (900), 333 states have internal predecessors, (900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 900 transitions. [2022-01-18 15:39:08,844 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 900 transitions. Word has length 18 [2022-01-18 15:39:08,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:08,844 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 900 transitions. [2022-01-18 15:39:08,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:08,844 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 900 transitions. [2022-01-18 15:39:08,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:08,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:08,845 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:08,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Ended with exit code 0 [2022-01-18 15:39:09,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:09,045 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash -930399613, now seen corresponding path program 404 times [2022-01-18 15:39:09,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:09,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251255453] [2022-01-18 15:39:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:09,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:09,223 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:09,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251255453] [2022-01-18 15:39:09,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251255453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:09,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223793616] [2022-01-18 15:39:09,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:39:09,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:09,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:09,224 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:09,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-01-18 15:39:09,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:39:09,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:09,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:09,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:09,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:09,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:09,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:09,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:09,562 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:09,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:09,999 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:10,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 103 [2022-01-18 15:39:10,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 80 [2022-01-18 15:39:10,027 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:10,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223793616] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:10,028 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:10,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 20 [2022-01-18 15:39:10,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558756990] [2022-01-18 15:39:10,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:10,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:10,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:10,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:10,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:10,028 INFO L87 Difference]: Start difference. First operand 334 states and 900 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:10,526 INFO L93 Difference]: Finished difference Result 454 states and 1117 transitions. [2022-01-18 15:39:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:39:10,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:10,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:10,527 INFO L225 Difference]: With dead ends: 454 [2022-01-18 15:39:10,527 INFO L226 Difference]: Without dead ends: 447 [2022-01-18 15:39:10,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=122, Invalid=808, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:39:10,527 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:10,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 251 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 644 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-01-18 15:39:10,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-18 15:39:10,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 333. [2022-01-18 15:39:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.6987951807228914) internal successors, (896), 332 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:10,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 896 transitions. [2022-01-18 15:39:10,530 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 896 transitions. Word has length 18 [2022-01-18 15:39:10,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:10,531 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 896 transitions. [2022-01-18 15:39:10,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 896 transitions. [2022-01-18 15:39:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:10,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:10,531 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:10,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-01-18 15:39:10,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-01-18 15:39:10,731 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:10,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1501854419, now seen corresponding path program 405 times [2022-01-18 15:39:10,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:10,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125780338] [2022-01-18 15:39:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:10,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:10,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125780338] [2022-01-18 15:39:10,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125780338] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:10,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038557880] [2022-01-18 15:39:10,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:10,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:10,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:10,878 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:10,878 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-01-18 15:39:10,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:39:10,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:10,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:10,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:11,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:11,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:39:11,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:11,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:39:11,303 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:11,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:11,742 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:11,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:39:11,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:39:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:11,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038557880] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:11,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:11,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 21 [2022-01-18 15:39:11,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617334475] [2022-01-18 15:39:11,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:11,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:39:11,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:11,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:39:11,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:39:11,769 INFO L87 Difference]: Start difference. First operand 333 states and 896 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:12,131 INFO L93 Difference]: Finished difference Result 467 states and 1134 transitions. [2022-01-18 15:39:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:39:12,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:12,132 INFO L225 Difference]: With dead ends: 467 [2022-01-18 15:39:12,132 INFO L226 Difference]: Without dead ends: 460 [2022-01-18 15:39:12,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:39:12,133 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:12,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 278 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 613 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:39:12,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-01-18 15:39:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 332. [2022-01-18 15:39:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.697885196374622) internal successors, (893), 331 states have internal predecessors, (893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 893 transitions. [2022-01-18 15:39:12,136 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 893 transitions. Word has length 18 [2022-01-18 15:39:12,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:12,136 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 893 transitions. [2022-01-18 15:39:12,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 893 transitions. [2022-01-18 15:39:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:12,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:12,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:12,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:12,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable425 [2022-01-18 15:39:12,337 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:12,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:12,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1927631349, now seen corresponding path program 406 times [2022-01-18 15:39:12,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170945290] [2022-01-18 15:39:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:12,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:12,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:12,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170945290] [2022-01-18 15:39:12,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170945290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:12,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943530385] [2022-01-18 15:39:12,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:12,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:12,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:12,567 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:12,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-01-18 15:39:12,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:12,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:12,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:12,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:12,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:12,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:12,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:12,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:13,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:13,544 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:13,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 112 [2022-01-18 15:39:13,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 79 [2022-01-18 15:39:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:13,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943530385] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:13,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:13,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:39:13,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252181741] [2022-01-18 15:39:13,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:13,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:13,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:13,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:13,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:13,567 INFO L87 Difference]: Start difference. First operand 332 states and 893 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:14,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:14,079 INFO L93 Difference]: Finished difference Result 425 states and 1065 transitions. [2022-01-18 15:39:14,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:39:14,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:14,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:14,080 INFO L225 Difference]: With dead ends: 425 [2022-01-18 15:39:14,080 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 15:39:14,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:39:14,080 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:14,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 189 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 543 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-01-18 15:39:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 15:39:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 336. [2022-01-18 15:39:14,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.71044776119403) internal successors, (908), 335 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:14,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 908 transitions. [2022-01-18 15:39:14,084 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 908 transitions. Word has length 18 [2022-01-18 15:39:14,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:14,084 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 908 transitions. [2022-01-18 15:39:14,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 908 transitions. [2022-01-18 15:39:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:14,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:14,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:14,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:14,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-01-18 15:39:14,285 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1943092145, now seen corresponding path program 407 times [2022-01-18 15:39:14,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:14,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100018965] [2022-01-18 15:39:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:14,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:14,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:14,515 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:14,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100018965] [2022-01-18 15:39:14,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100018965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:14,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397817469] [2022-01-18 15:39:14,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:39:14,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:14,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:14,517 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:14,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-01-18 15:39:14,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:39:14,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:14,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:14,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:14,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:14,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:14,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:14,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:14,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:15,478 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:15,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:15,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:15,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397817469] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:15,499 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:15,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:39:15,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580286110] [2022-01-18 15:39:15,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:15,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:15,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:15,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:15,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:15,500 INFO L87 Difference]: Start difference. First operand 336 states and 908 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:16,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:16,064 INFO L93 Difference]: Finished difference Result 427 states and 1067 transitions. [2022-01-18 15:39:16,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 15:39:16,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:16,065 INFO L225 Difference]: With dead ends: 427 [2022-01-18 15:39:16,065 INFO L226 Difference]: Without dead ends: 420 [2022-01-18 15:39:16,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:39:16,065 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:16,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 202 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 609 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-01-18 15:39:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-01-18 15:39:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 335. [2022-01-18 15:39:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.7065868263473054) internal successors, (904), 334 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:16,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 904 transitions. [2022-01-18 15:39:16,069 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 904 transitions. Word has length 18 [2022-01-18 15:39:16,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 904 transitions. [2022-01-18 15:39:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 904 transitions. [2022-01-18 15:39:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:16,069 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:16,070 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:16,085 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-01-18 15:39:16,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:16,270 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:16,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:16,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1780420345, now seen corresponding path program 408 times [2022-01-18 15:39:16,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:16,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965362703] [2022-01-18 15:39:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:16,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:16,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:16,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965362703] [2022-01-18 15:39:16,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965362703] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:16,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418005341] [2022-01-18 15:39:16,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:39:16,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:16,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:16,484 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:16,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-01-18 15:39:16,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:39:16,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:16,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:16,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:39:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:16,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:39:17,095 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:17,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:17,608 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:17,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:17,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:17,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418005341] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:17,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:17,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:39:17,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582528346] [2022-01-18 15:39:17,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:17,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:17,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:17,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:17,630 INFO L87 Difference]: Start difference. First operand 335 states and 904 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:18,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:18,115 INFO L93 Difference]: Finished difference Result 397 states and 1022 transitions. [2022-01-18 15:39:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:39:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:18,116 INFO L225 Difference]: With dead ends: 397 [2022-01-18 15:39:18,116 INFO L226 Difference]: Without dead ends: 390 [2022-01-18 15:39:18,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:39:18,116 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 45 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:18,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 198 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 543 Invalid, 0 Unknown, 105 Unchecked, 0.2s Time] [2022-01-18 15:39:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-01-18 15:39:18,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 335. [2022-01-18 15:39:18,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.7065868263473054) internal successors, (904), 334 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 904 transitions. [2022-01-18 15:39:18,120 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 904 transitions. Word has length 18 [2022-01-18 15:39:18,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:18,120 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 904 transitions. [2022-01-18 15:39:18,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:18,120 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 904 transitions. [2022-01-18 15:39:18,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:18,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:18,120 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:18,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:18,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable428,412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:18,321 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:18,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1245190543, now seen corresponding path program 409 times [2022-01-18 15:39:18,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:18,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813495651] [2022-01-18 15:39:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:18,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:18,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:18,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813495651] [2022-01-18 15:39:18,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813495651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:18,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331033240] [2022-01-18 15:39:18,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:39:18,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:18,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:18,507 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:18,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-01-18 15:39:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:18,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:18,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:18,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:39:18,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:18,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:39:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:18,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:19,524 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:19,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:19,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:39:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331033240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:19,546 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:19,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 11] total 23 [2022-01-18 15:39:19,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622331159] [2022-01-18 15:39:19,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:19,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:19,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:19,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:19,546 INFO L87 Difference]: Start difference. First operand 335 states and 904 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:19,862 INFO L93 Difference]: Finished difference Result 425 states and 1061 transitions. [2022-01-18 15:39:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:39:19,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:19,863 INFO L225 Difference]: With dead ends: 425 [2022-01-18 15:39:19,863 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 15:39:19,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:39:19,863 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:19,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 267 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 525 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-18 15:39:19,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 15:39:19,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 335. [2022-01-18 15:39:19,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.7065868263473054) internal successors, (904), 334 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:19,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 904 transitions. [2022-01-18 15:39:19,867 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 904 transitions. Word has length 18 [2022-01-18 15:39:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:19,867 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 904 transitions. [2022-01-18 15:39:19,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:19,868 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 904 transitions. [2022-01-18 15:39:19,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:19,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:19,868 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:19,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-01-18 15:39:20,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2022-01-18 15:39:20,068 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:20,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:20,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1038638527, now seen corresponding path program 410 times [2022-01-18 15:39:20,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:20,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26757186] [2022-01-18 15:39:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:20,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:20,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26757186] [2022-01-18 15:39:20,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26757186] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:20,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430279648] [2022-01-18 15:39:20,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:39:20,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:20,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:20,287 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:20,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-01-18 15:39:20,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:39:20,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:20,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:20,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:20,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:20,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:20,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:20,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:20,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:21,375 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:21,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:39:21,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:39:21,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:21,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430279648] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:21,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:21,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:39:21,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440379280] [2022-01-18 15:39:21,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:21,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:21,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:21,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:21,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:21,394 INFO L87 Difference]: Start difference. First operand 335 states and 904 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:21,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:21,805 INFO L93 Difference]: Finished difference Result 473 states and 1164 transitions. [2022-01-18 15:39:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:39:21,805 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:21,806 INFO L225 Difference]: With dead ends: 473 [2022-01-18 15:39:21,806 INFO L226 Difference]: Without dead ends: 466 [2022-01-18 15:39:21,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:39:21,806 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 88 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:21,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 207 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 595 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-01-18 15:39:21,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-18 15:39:21,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 344. [2022-01-18 15:39:21,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.7230320699708455) internal successors, (934), 343 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:21,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 934 transitions. [2022-01-18 15:39:21,810 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 934 transitions. Word has length 18 [2022-01-18 15:39:21,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:21,810 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 934 transitions. [2022-01-18 15:39:21,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 934 transitions. [2022-01-18 15:39:21,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:21,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:21,811 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:21,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Ended with exit code 0 [2022-01-18 15:39:22,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-01-18 15:39:22,011 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:22,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:22,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1023177731, now seen corresponding path program 411 times [2022-01-18 15:39:22,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:22,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267263205] [2022-01-18 15:39:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:22,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:22,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:22,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267263205] [2022-01-18 15:39:22,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267263205] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:22,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997741397] [2022-01-18 15:39:22,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:22,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:22,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:22,265 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:22,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-01-18 15:39:22,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:39:22,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:22,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:22,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:22,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:22,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:22,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:22,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:22,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:23,295 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:23,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:23,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:23,313 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:23,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997741397] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:23,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:23,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:39:23,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509462781] [2022-01-18 15:39:23,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:23,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:39:23,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:39:23,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:39:23,314 INFO L87 Difference]: Start difference. First operand 344 states and 934 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:23,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:23,728 INFO L93 Difference]: Finished difference Result 474 states and 1164 transitions. [2022-01-18 15:39:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:39:23,728 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:23,729 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:39:23,729 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:39:23,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:23,729 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 84 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:23,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 259 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 648 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-01-18 15:39:23,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:39:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 344. [2022-01-18 15:39:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.7230320699708455) internal successors, (934), 343 states have internal predecessors, (934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:23,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 934 transitions. [2022-01-18 15:39:23,733 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 934 transitions. Word has length 18 [2022-01-18 15:39:23,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:23,733 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 934 transitions. [2022-01-18 15:39:23,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:23,733 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 934 transitions. [2022-01-18 15:39:23,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:23,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:23,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:23,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-01-18 15:39:23,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:23,934 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash 451722925, now seen corresponding path program 412 times [2022-01-18 15:39:23,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:23,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287756717] [2022-01-18 15:39:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:23,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:24,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:24,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287756717] [2022-01-18 15:39:24,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287756717] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:24,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873049068] [2022-01-18 15:39:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:24,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:24,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:24,228 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:24,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-01-18 15:39:24,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:24,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:24,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:24,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:24,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:24,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:39:24,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:24,733 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:39:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:24,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:25,490 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:25,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:25,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:25,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873049068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:25,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:25,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-01-18 15:39:25,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732777207] [2022-01-18 15:39:25,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:25,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 15:39:25,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:25,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 15:39:25,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:39:25,541 INFO L87 Difference]: Start difference. First operand 344 states and 934 transitions. Second operand has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:26,470 INFO L93 Difference]: Finished difference Result 489 states and 1184 transitions. [2022-01-18 15:39:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:39:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:26,476 INFO L225 Difference]: With dead ends: 489 [2022-01-18 15:39:26,476 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:39:26,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:39:26,477 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:26,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 381 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 814 Invalid, 0 Unknown, 165 Unchecked, 0.3s Time] [2022-01-18 15:39:26,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:39:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 342. [2022-01-18 15:39:26,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.718475073313783) internal successors, (927), 341 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:26,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 927 transitions. [2022-01-18 15:39:26,480 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 927 transitions. Word has length 18 [2022-01-18 15:39:26,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:26,481 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 927 transitions. [2022-01-18 15:39:26,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 28 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:26,481 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 927 transitions. [2022-01-18 15:39:26,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:26,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:26,481 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:26,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-01-18 15:39:26,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-01-18 15:39:26,682 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:26,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash -83506877, now seen corresponding path program 413 times [2022-01-18 15:39:26,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:26,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506805314] [2022-01-18 15:39:26,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:26,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:26,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:26,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:26,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506805314] [2022-01-18 15:39:26,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506805314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:26,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634479850] [2022-01-18 15:39:26,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:39:26,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:26,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:26,928 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:26,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-01-18 15:39:26,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:39:26,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:26,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:26,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:27,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:27,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:39:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:27,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:39:27,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:27,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:28,125 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:28,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:28,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:28,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634479850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:28,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:28,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:39:28,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648865056] [2022-01-18 15:39:28,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:28,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:39:28,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:28,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:39:28,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:39:28,146 INFO L87 Difference]: Start difference. First operand 342 states and 927 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:28,614 INFO L93 Difference]: Finished difference Result 468 states and 1142 transitions. [2022-01-18 15:39:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:39:28,615 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:28,615 INFO L225 Difference]: With dead ends: 468 [2022-01-18 15:39:28,615 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:39:28,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:39:28,616 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 97 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:28,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 381 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 704 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2022-01-18 15:39:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:39:28,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 339. [2022-01-18 15:39:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.71301775147929) internal successors, (917), 338 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:28,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 917 transitions. [2022-01-18 15:39:28,619 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 917 transitions. Word has length 18 [2022-01-18 15:39:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:28,619 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 917 transitions. [2022-01-18 15:39:28,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 917 transitions. [2022-01-18 15:39:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:28,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:28,620 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:28,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:28,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-01-18 15:39:28,820 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 504238445, now seen corresponding path program 414 times [2022-01-18 15:39:28,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:28,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203689567] [2022-01-18 15:39:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:28,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:29,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:29,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203689567] [2022-01-18 15:39:29,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203689567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:29,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849134934] [2022-01-18 15:39:29,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:39:29,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:29,030 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:29,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-01-18 15:39:29,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:39:29,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:29,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:29,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:29,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:29,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:39:29,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:29,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:39:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:29,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:30,195 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:30,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:30,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:30,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:30,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849134934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:30,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:30,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:39:30,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878394906] [2022-01-18 15:39:30,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:30,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:39:30,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:30,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:39:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:39:30,213 INFO L87 Difference]: Start difference. First operand 339 states and 917 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:30,535 INFO L93 Difference]: Finished difference Result 461 states and 1125 transitions. [2022-01-18 15:39:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:30,536 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:39:30,536 INFO L226 Difference]: Without dead ends: 454 [2022-01-18 15:39:30,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:39:30,536 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 54 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:30,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 429 Invalid, 730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 640 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-01-18 15:39:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-01-18 15:39:30,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 335. [2022-01-18 15:39:30,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.7065868263473054) internal successors, (904), 334 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:30,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 904 transitions. [2022-01-18 15:39:30,540 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 904 transitions. Word has length 18 [2022-01-18 15:39:30,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:30,540 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 904 transitions. [2022-01-18 15:39:30,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:30,540 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 904 transitions. [2022-01-18 15:39:30,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:30,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:30,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:30,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:30,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2022-01-18 15:39:30,741 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:30,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash -513652097, now seen corresponding path program 415 times [2022-01-18 15:39:30,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016627813] [2022-01-18 15:39:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:30,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:30,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016627813] [2022-01-18 15:39:30,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016627813] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:30,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704380018] [2022-01-18 15:39:30,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:39:30,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:30,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:30,897 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:30,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-01-18 15:39:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:30,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:30,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:31,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:31,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 114 [2022-01-18 15:39:31,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:31,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 94 [2022-01-18 15:39:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:31,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:31,716 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:31,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:39:31,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:39:31,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:31,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704380018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:31,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:31,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:39:31,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270538248] [2022-01-18 15:39:31,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:31,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:39:31,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:31,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:39:31,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:39:31,748 INFO L87 Difference]: Start difference. First operand 335 states and 904 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:32,366 INFO L93 Difference]: Finished difference Result 552 states and 1342 transitions. [2022-01-18 15:39:32,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:39:32,366 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:32,367 INFO L225 Difference]: With dead ends: 552 [2022-01-18 15:39:32,367 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 15:39:32,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:32,368 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 72 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:32,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 364 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:39:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 15:39:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 343. [2022-01-18 15:39:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7251461988304095) internal successors, (932), 342 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 932 transitions. [2022-01-18 15:39:32,372 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 932 transitions. Word has length 18 [2022-01-18 15:39:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:32,372 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 932 transitions. [2022-01-18 15:39:32,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 932 transitions. [2022-01-18 15:39:32,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:32,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:32,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:32,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:32,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-01-18 15:39:32,573 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:32,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:32,573 INFO L85 PathProgramCache]: Analyzing trace with hash 607072379, now seen corresponding path program 416 times [2022-01-18 15:39:32,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:32,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767136435] [2022-01-18 15:39:32,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:32,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767136435] [2022-01-18 15:39:32,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767136435] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399742719] [2022-01-18 15:39:32,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:39:32,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:32,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:32,726 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:32,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-01-18 15:39:32,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:39:32,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:32,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:39:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:32,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:39:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:33,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:33,465 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:33,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:39:33,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:39:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:33,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399742719] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:33,494 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:33,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 15:39:33,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194277561] [2022-01-18 15:39:33,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:33,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:33,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:33,494 INFO L87 Difference]: Start difference. First operand 343 states and 932 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:34,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:34,035 INFO L93 Difference]: Finished difference Result 566 states and 1364 transitions. [2022-01-18 15:39:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:39:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:34,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:34,036 INFO L225 Difference]: With dead ends: 566 [2022-01-18 15:39:34,036 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:39:34,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:34,037 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:34,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 309 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 946 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:39:34,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:39:34,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 343. [2022-01-18 15:39:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7251461988304095) internal successors, (932), 342 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 932 transitions. [2022-01-18 15:39:34,040 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 932 transitions. Word has length 18 [2022-01-18 15:39:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:34,041 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 932 transitions. [2022-01-18 15:39:34,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 932 transitions. [2022-01-18 15:39:34,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:34,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:34,041 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:34,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Ended with exit code 0 [2022-01-18 15:39:34,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-01-18 15:39:34,241 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:34,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:34,242 INFO L85 PathProgramCache]: Analyzing trace with hash 591611583, now seen corresponding path program 417 times [2022-01-18 15:39:34,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:34,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791535614] [2022-01-18 15:39:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:34,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:34,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:34,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791535614] [2022-01-18 15:39:34,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791535614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:34,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800242151] [2022-01-18 15:39:34,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:34,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:34,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:34,401 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:34,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-01-18 15:39:34,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:39:34,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:34,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:34,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:34,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:34,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 119 [2022-01-18 15:39:34,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:34,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 97 [2022-01-18 15:39:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:34,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:35,128 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:35,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:39:35,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:39:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800242151] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:35,157 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:35,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 15:39:35,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553568849] [2022-01-18 15:39:35,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:35,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:35,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:35,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:35,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:35,158 INFO L87 Difference]: Start difference. First operand 343 states and 932 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:35,669 INFO L93 Difference]: Finished difference Result 551 states and 1341 transitions. [2022-01-18 15:39:35,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:39:35,669 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:35,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:35,670 INFO L225 Difference]: With dead ends: 551 [2022-01-18 15:39:35,670 INFO L226 Difference]: Without dead ends: 544 [2022-01-18 15:39:35,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:35,670 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:35,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 276 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:39:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-18 15:39:35,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 341. [2022-01-18 15:39:35,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.7205882352941178) internal successors, (925), 340 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 925 transitions. [2022-01-18 15:39:35,674 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 925 transitions. Word has length 18 [2022-01-18 15:39:35,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:35,674 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 925 transitions. [2022-01-18 15:39:35,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:35,674 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 925 transitions. [2022-01-18 15:39:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:35,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:35,674 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:35,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-01-18 15:39:35,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:35,875 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:35,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:35,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1682783535, now seen corresponding path program 418 times [2022-01-18 15:39:35,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:35,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107780300] [2022-01-18 15:39:35,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:35,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:36,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:36,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107780300] [2022-01-18 15:39:36,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107780300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:36,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034201014] [2022-01-18 15:39:36,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:36,042 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:36,043 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:36,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-01-18 15:39:36,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:36,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:36,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:36,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:36,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:36,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:36,858 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:36,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:39:36,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:39:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034201014] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:36,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:36,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 20 [2022-01-18 15:39:36,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946203803] [2022-01-18 15:39:36,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:36,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 15:39:36,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:36,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 15:39:36,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:39:36,887 INFO L87 Difference]: Start difference. First operand 341 states and 925 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:37,455 INFO L93 Difference]: Finished difference Result 582 states and 1432 transitions. [2022-01-18 15:39:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:39:37,456 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:37,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:37,456 INFO L225 Difference]: With dead ends: 582 [2022-01-18 15:39:37,456 INFO L226 Difference]: Without dead ends: 575 [2022-01-18 15:39:37,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:39:37,457 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:37,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 263 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 787 Invalid, 0 Unknown, 56 Unchecked, 0.3s Time] [2022-01-18 15:39:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2022-01-18 15:39:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 348. [2022-01-18 15:39:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.7406340057636887) internal successors, (951), 347 states have internal predecessors, (951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 951 transitions. [2022-01-18 15:39:37,461 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 951 transitions. Word has length 18 [2022-01-18 15:39:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:37,461 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 951 transitions. [2022-01-18 15:39:37,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 951 transitions. [2022-01-18 15:39:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:37,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:37,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:37,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:37,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:37,662 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:37,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:37,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1667322739, now seen corresponding path program 419 times [2022-01-18 15:39:37,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:37,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774859269] [2022-01-18 15:39:37,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:37,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:37,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:37,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774859269] [2022-01-18 15:39:37,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774859269] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:37,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082441323] [2022-01-18 15:39:37,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:39:37,865 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:37,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:37,865 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:37,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-01-18 15:39:37,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:39:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:38,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:38,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:38,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:38,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:38,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:38,676 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:38,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 104 [2022-01-18 15:39:38,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 81 [2022-01-18 15:39:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:38,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082441323] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:38,704 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:38,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:39:38,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523075178] [2022-01-18 15:39:38,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:38,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:39:38,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:39:38,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:39:38,705 INFO L87 Difference]: Start difference. First operand 348 states and 951 transitions. Second operand has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:39,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:39,288 INFO L93 Difference]: Finished difference Result 556 states and 1402 transitions. [2022-01-18 15:39:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:39:39,289 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:39,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:39,289 INFO L225 Difference]: With dead ends: 556 [2022-01-18 15:39:39,289 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:39:39,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:39:39,290 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 63 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:39,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 281 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 763 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-01-18 15:39:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:39:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 353. [2022-01-18 15:39:39,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.758522727272727) internal successors, (971), 352 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 971 transitions. [2022-01-18 15:39:39,294 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 971 transitions. Word has length 18 [2022-01-18 15:39:39,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:39,294 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 971 transitions. [2022-01-18 15:39:39,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 21 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:39,294 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 971 transitions. [2022-01-18 15:39:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:39,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:39,295 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:39,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-01-18 15:39:39,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable439 [2022-01-18 15:39:39,495 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:39,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:39,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1095867933, now seen corresponding path program 420 times [2022-01-18 15:39:39,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:39,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605897218] [2022-01-18 15:39:39,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:39,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:39,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605897218] [2022-01-18 15:39:39,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605897218] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:39,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032529809] [2022-01-18 15:39:39,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:39:39,724 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:39,724 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:39,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-01-18 15:39:39,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:39:39,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:39,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:39,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:40,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:40,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 101 [2022-01-18 15:39:40,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:40,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 83 [2022-01-18 15:39:40,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:40,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:40,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:39:40,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:39:40,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:39:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:40,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032529809] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:40,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:40,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:39:40,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664405308] [2022-01-18 15:39:40,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:40,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:40,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:40,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:40,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:40,634 INFO L87 Difference]: Start difference. First operand 353 states and 971 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:41,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:41,088 INFO L93 Difference]: Finished difference Result 575 states and 1431 transitions. [2022-01-18 15:39:41,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:39:41,088 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:41,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:41,089 INFO L225 Difference]: With dead ends: 575 [2022-01-18 15:39:41,089 INFO L226 Difference]: Without dead ends: 568 [2022-01-18 15:39:41,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:39:41,089 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:41,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 305 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 767 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-01-18 15:39:41,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-18 15:39:41,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 353. [2022-01-18 15:39:41,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.758522727272727) internal successors, (971), 352 states have internal predecessors, (971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 971 transitions. [2022-01-18 15:39:41,093 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 971 transitions. Word has length 18 [2022-01-18 15:39:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:41,094 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 971 transitions. [2022-01-18 15:39:41,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:41,094 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 971 transitions. [2022-01-18 15:39:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:41,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:41,094 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:41,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:41,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:41,294 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash 670091003, now seen corresponding path program 421 times [2022-01-18 15:39:41,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:41,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997440409] [2022-01-18 15:39:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:41,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:41,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:41,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997440409] [2022-01-18 15:39:41,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997440409] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:41,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438221209] [2022-01-18 15:39:41,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:39:41,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:41,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:41,510 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:41,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-01-18 15:39:41,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:41,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:41,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:41,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:41,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:41,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:41,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:41,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:42,435 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:42,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 113 [2022-01-18 15:39:42,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 80 [2022-01-18 15:39:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:42,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438221209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:42,458 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:42,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:39:42,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648638691] [2022-01-18 15:39:42,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:42,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:42,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:42,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:42,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:42,459 INFO L87 Difference]: Start difference. First operand 353 states and 971 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:42,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:42,847 INFO L93 Difference]: Finished difference Result 504 states and 1286 transitions. [2022-01-18 15:39:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:42,848 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:39:42,848 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 15:39:42,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=763, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:39:42,849 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 52 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:42,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 154 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 534 Invalid, 0 Unknown, 48 Unchecked, 0.2s Time] [2022-01-18 15:39:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 15:39:42,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 355. [2022-01-18 15:39:42,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.7655367231638417) internal successors, (979), 354 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:42,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 979 transitions. [2022-01-18 15:39:42,853 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 979 transitions. Word has length 18 [2022-01-18 15:39:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:42,853 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 979 transitions. [2022-01-18 15:39:42,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 979 transitions. [2022-01-18 15:39:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:42,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:42,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:42,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-01-18 15:39:43,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable441,425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:43,054 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:43,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:43,054 INFO L85 PathProgramCache]: Analyzing trace with hash 654630207, now seen corresponding path program 422 times [2022-01-18 15:39:43,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:43,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382953767] [2022-01-18 15:39:43,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:43,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:43,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382953767] [2022-01-18 15:39:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382953767] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:43,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943963843] [2022-01-18 15:39:43,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:39:43,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:43,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:43,216 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:43,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-01-18 15:39:43,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:39:43,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:43,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:43,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:43,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:43,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:43,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:43,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:43,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:43,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:44,081 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:44,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 111 [2022-01-18 15:39:44,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 78 [2022-01-18 15:39:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:44,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943963843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:44,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:44,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-01-18 15:39:44,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423488989] [2022-01-18 15:39:44,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:44,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 15:39:44,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:44,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 15:39:44,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:39:44,103 INFO L87 Difference]: Start difference. First operand 355 states and 979 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:44,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:44,455 INFO L93 Difference]: Finished difference Result 476 states and 1240 transitions. [2022-01-18 15:39:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:44,455 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:44,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:44,456 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:39:44,456 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:39:44,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:44,456 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:44,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 141 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 406 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:39:44,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:39:44,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 355. [2022-01-18 15:39:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.7655367231638417) internal successors, (979), 354 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:44,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 979 transitions. [2022-01-18 15:39:44,460 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 979 transitions. Word has length 18 [2022-01-18 15:39:44,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:44,460 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 979 transitions. [2022-01-18 15:39:44,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:44,460 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 979 transitions. [2022-01-18 15:39:44,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:44,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:44,460 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:44,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Ended with exit code 0 [2022-01-18 15:39:44,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2022-01-18 15:39:44,661 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:44,661 INFO L85 PathProgramCache]: Analyzing trace with hash 83175401, now seen corresponding path program 423 times [2022-01-18 15:39:44,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:44,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751487126] [2022-01-18 15:39:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:44,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:44,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:44,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751487126] [2022-01-18 15:39:44,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751487126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:44,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272766131] [2022-01-18 15:39:44,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:44,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:44,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:44,880 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-01-18 15:39:44,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:39:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:44,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:44,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:45,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:45,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 102 [2022-01-18 15:39:45,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:45,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 84 [2022-01-18 15:39:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:45,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:45,862 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:45,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:45,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:45,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272766131] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:45,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:45,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:39:45,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430541351] [2022-01-18 15:39:45,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:45,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:45,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:45,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:45,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:45,884 INFO L87 Difference]: Start difference. First operand 355 states and 979 transitions. Second operand has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:46,201 INFO L93 Difference]: Finished difference Result 491 states and 1261 transitions. [2022-01-18 15:39:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:46,202 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:39:46,202 INFO L226 Difference]: Without dead ends: 484 [2022-01-18 15:39:46,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:46,203 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:46,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 176 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 477 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-01-18 15:39:46,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-18 15:39:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 355. [2022-01-18 15:39:46,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 2.7655367231638417) internal successors, (979), 354 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 979 transitions. [2022-01-18 15:39:46,206 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 979 transitions. Word has length 18 [2022-01-18 15:39:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 979 transitions. [2022-01-18 15:39:46,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 23 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 979 transitions. [2022-01-18 15:39:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:46,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:46,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:46,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:46,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2022-01-18 15:39:46,407 INFO L402 AbstractCegarLoop]: === Iteration 445 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:46,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash -452054401, now seen corresponding path program 424 times [2022-01-18 15:39:46,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103401419] [2022-01-18 15:39:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:46,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:46,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103401419] [2022-01-18 15:39:46,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103401419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816709218] [2022-01-18 15:39:46,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:46,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:46,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:46,577 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:46,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-01-18 15:39:46,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:46,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:46,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:46,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:46,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:46,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:39:46,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:46,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:39:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:47,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:47,638 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:47,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:47,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:47,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816709218] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:47,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:47,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:39:47,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185341761] [2022-01-18 15:39:47,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:47,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:47,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:47,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:47,662 INFO L87 Difference]: Start difference. First operand 355 states and 979 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:48,153 INFO L93 Difference]: Finished difference Result 531 states and 1328 transitions. [2022-01-18 15:39:48,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:39:48,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:48,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:48,154 INFO L225 Difference]: With dead ends: 531 [2022-01-18 15:39:48,154 INFO L226 Difference]: Without dead ends: 524 [2022-01-18 15:39:48,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:39:48,154 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 71 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:48,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 302 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 684 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-01-18 15:39:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-18 15:39:48,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 357. [2022-01-18 15:39:48,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.7724719101123596) internal successors, (987), 356 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:48,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 987 transitions. [2022-01-18 15:39:48,159 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 987 transitions. Word has length 18 [2022-01-18 15:39:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:48,159 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 987 transitions. [2022-01-18 15:39:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 987 transitions. [2022-01-18 15:39:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:48,159 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:48,159 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:48,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-01-18 15:39:48,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2022-01-18 15:39:48,360 INFO L402 AbstractCegarLoop]: === Iteration 446 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:48,360 INFO L85 PathProgramCache]: Analyzing trace with hash -658606417, now seen corresponding path program 425 times [2022-01-18 15:39:48,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086658387] [2022-01-18 15:39:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:48,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:48,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:48,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086658387] [2022-01-18 15:39:48,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086658387] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:48,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125567353] [2022-01-18 15:39:48,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:39:48,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:48,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:48,565 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:48,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-01-18 15:39:48,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:39:48,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:48,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:48,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:48,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:48,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:48,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:48,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:49,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:49,602 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:49,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:49,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:49,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125567353] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:49,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:49,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-01-18 15:39:49,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379800133] [2022-01-18 15:39:49,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:49,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 15:39:49,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:49,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 15:39:49,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:39:49,621 INFO L87 Difference]: Start difference. First operand 357 states and 987 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:49,870 INFO L93 Difference]: Finished difference Result 486 states and 1259 transitions. [2022-01-18 15:39:49,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:39:49,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:49,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:49,871 INFO L225 Difference]: With dead ends: 486 [2022-01-18 15:39:49,871 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:39:49,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:39:49,871 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 37 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:49,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 124 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 454 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-01-18 15:39:49,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:39:49,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 360. [2022-01-18 15:39:49,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.7743732590529246) internal successors, (996), 359 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 996 transitions. [2022-01-18 15:39:49,875 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 996 transitions. Word has length 18 [2022-01-18 15:39:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:49,875 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 996 transitions. [2022-01-18 15:39:49,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 996 transitions. [2022-01-18 15:39:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:49,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:49,876 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:49,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-01-18 15:39:50,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable445,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:50,076 INFO L402 AbstractCegarLoop]: === Iteration 447 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:50,076 INFO L85 PathProgramCache]: Analyzing trace with hash -674067213, now seen corresponding path program 426 times [2022-01-18 15:39:50,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:50,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726697577] [2022-01-18 15:39:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:50,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:50,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726697577] [2022-01-18 15:39:50,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726697577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:50,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562381585] [2022-01-18 15:39:50,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:39:50,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:50,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:50,347 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:50,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-01-18 15:39:50,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:39:50,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:50,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:39:50,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:50,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:50,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 129 treesize of output 109 [2022-01-18 15:39:50,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:50,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 89 [2022-01-18 15:39:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:51,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:52,498 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:52,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 203 treesize of output 176 [2022-01-18 15:39:52,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 139 [2022-01-18 15:39:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:52,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562381585] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:52,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:52,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:39:52,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951307288] [2022-01-18 15:39:52,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:52,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:39:52,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:52,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:39:52,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:39:52,570 INFO L87 Difference]: Start difference. First operand 360 states and 996 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:53,069 INFO L93 Difference]: Finished difference Result 477 states and 1246 transitions. [2022-01-18 15:39:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:39:53,070 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:53,070 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:39:53,070 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:39:53,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:39:53,071 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:53,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 148 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 490 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-01-18 15:39:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:39:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 360. [2022-01-18 15:39:53,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.7743732590529246) internal successors, (996), 359 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 996 transitions. [2022-01-18 15:39:53,074 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 996 transitions. Word has length 18 [2022-01-18 15:39:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:53,074 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 996 transitions. [2022-01-18 15:39:53,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 996 transitions. [2022-01-18 15:39:53,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:53,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:53,075 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:53,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-01-18 15:39:53,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2022-01-18 15:39:53,275 INFO L402 AbstractCegarLoop]: === Iteration 448 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:53,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1245522019, now seen corresponding path program 427 times [2022-01-18 15:39:53,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:53,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690441909] [2022-01-18 15:39:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:53,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:53,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:53,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690441909] [2022-01-18 15:39:53,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690441909] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137915342] [2022-01-18 15:39:53,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:39:53,463 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:53,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:53,464 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:53,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-01-18 15:39:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:53,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:53,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:53,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2022-01-18 15:39:53,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:53,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 86 [2022-01-18 15:39:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:54,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:54,626 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:54,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 110 [2022-01-18 15:39:54,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 77 [2022-01-18 15:39:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:54,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137915342] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:54,644 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:54,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:39:54,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026169364] [2022-01-18 15:39:54,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:54,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:39:54,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:39:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:39:54,645 INFO L87 Difference]: Start difference. First operand 360 states and 996 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:54,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:54,829 INFO L93 Difference]: Finished difference Result 475 states and 1240 transitions. [2022-01-18 15:39:54,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:39:54,830 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:54,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:54,830 INFO L225 Difference]: With dead ends: 475 [2022-01-18 15:39:54,830 INFO L226 Difference]: Without dead ends: 468 [2022-01-18 15:39:54,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:39:54,830 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:54,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 162 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 417 Invalid, 0 Unknown, 69 Unchecked, 0.2s Time] [2022-01-18 15:39:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-18 15:39:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 359. [2022-01-18 15:39:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.7737430167597767) internal successors, (993), 358 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:54,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 993 transitions. [2022-01-18 15:39:54,834 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 993 transitions. Word has length 18 [2022-01-18 15:39:54,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:54,834 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 993 transitions. [2022-01-18 15:39:54,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 993 transitions. [2022-01-18 15:39:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:54,835 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:54,835 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:54,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:55,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable447,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:55,047 INFO L402 AbstractCegarLoop]: === Iteration 449 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:55,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1780751821, now seen corresponding path program 428 times [2022-01-18 15:39:55,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:55,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630821947] [2022-01-18 15:39:55,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:55,048 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:55,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:55,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630821947] [2022-01-18 15:39:55,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630821947] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811933784] [2022-01-18 15:39:55,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:39:55,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:55,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:55,272 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:55,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-01-18 15:39:55,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:39:55,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:55,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 15:39:55,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:55,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:55,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 105 [2022-01-18 15:39:55,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:55,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 87 [2022-01-18 15:39:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:56,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:56,995 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:56,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 173 [2022-01-18 15:39:56,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 128 [2022-01-18 15:39:57,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:57,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811933784] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:57,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:57,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 26 [2022-01-18 15:39:57,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825510990] [2022-01-18 15:39:57,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:57,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:39:57,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:57,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:39:57,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:39:57,084 INFO L87 Difference]: Start difference. First operand 359 states and 993 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:57,331 INFO L93 Difference]: Finished difference Result 476 states and 1240 transitions. [2022-01-18 15:39:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-18 15:39:57,331 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:57,332 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:39:57,332 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:39:57,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:39:57,332 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:57,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 156 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 408 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-01-18 15:39:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:39:57,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 358. [2022-01-18 15:39:57,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.773109243697479) internal successors, (990), 357 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:57,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 990 transitions. [2022-01-18 15:39:57,335 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 990 transitions. Word has length 18 [2022-01-18 15:39:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:57,336 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 990 transitions. [2022-01-18 15:39:57,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:57,336 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 990 transitions. [2022-01-18 15:39:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:57,336 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:57,336 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:57,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-01-18 15:39:57,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2022-01-18 15:39:57,536 INFO L402 AbstractCegarLoop]: === Iteration 450 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:57,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:57,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1193006499, now seen corresponding path program 429 times [2022-01-18 15:39:57,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:57,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748213661] [2022-01-18 15:39:57,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:57,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:57,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:57,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:57,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748213661] [2022-01-18 15:39:57,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748213661] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:57,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511243013] [2022-01-18 15:39:57,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:39:57,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:57,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:57,808 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:57,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-01-18 15:39:57,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:39:57,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:57,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:58,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:58,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:39:58,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:39:58,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:39:58,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:58,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:39:58,946 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:39:58,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 109 [2022-01-18 15:39:58,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-01-18 15:39:58,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:58,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511243013] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:39:58,963 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:39:58,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:39:58,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600109916] [2022-01-18 15:39:58,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:39:58,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:39:58,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:39:58,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:39:58,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:39:58,964 INFO L87 Difference]: Start difference. First operand 358 states and 990 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:39:59,155 INFO L93 Difference]: Finished difference Result 477 states and 1240 transitions. [2022-01-18 15:39:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:39:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:39:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:39:59,156 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:39:59,156 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:39:59,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:39:59,156 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:39:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 170 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 390 Invalid, 0 Unknown, 49 Unchecked, 0.2s Time] [2022-01-18 15:39:59,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:39:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 357. [2022-01-18 15:39:59,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.7724719101123596) internal successors, (987), 356 states have internal predecessors, (987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 987 transitions. [2022-01-18 15:39:59,159 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 987 transitions. Word has length 18 [2022-01-18 15:39:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:39:59,160 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 987 transitions. [2022-01-18 15:39:59,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:39:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 987 transitions. [2022-01-18 15:39:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:39:59,160 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:39:59,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:39:59,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-01-18 15:39:59,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2022-01-18 15:39:59,360 INFO L402 AbstractCegarLoop]: === Iteration 451 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:39:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:39:59,361 INFO L85 PathProgramCache]: Analyzing trace with hash 256475071, now seen corresponding path program 430 times [2022-01-18 15:39:59,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:39:59,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742514544] [2022-01-18 15:39:59,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:39:59,361 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:39:59,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:39:59,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:39:59,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:39:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742514544] [2022-01-18 15:39:59,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742514544] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:39:59,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290861227] [2022-01-18 15:39:59,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:39:59,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:39:59,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:39:59,620 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:39:59,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-01-18 15:39:59,643 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:39:59,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:39:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:39:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:39:59,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 95 [2022-01-18 15:39:59,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 77 [2022-01-18 15:40:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:00,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:00,569 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:00,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 102 [2022-01-18 15:40:00,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 79 [2022-01-18 15:40:00,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:00,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290861227] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:00,583 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:00,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:40:00,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254166225] [2022-01-18 15:40:00,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:00,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:40:00,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:40:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:40:00,584 INFO L87 Difference]: Start difference. First operand 357 states and 987 transitions. Second operand has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:00,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:00,989 INFO L93 Difference]: Finished difference Result 673 states and 1761 transitions. [2022-01-18 15:40:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:00,990 INFO L225 Difference]: With dead ends: 673 [2022-01-18 15:40:00,990 INFO L226 Difference]: Without dead ends: 666 [2022-01-18 15:40:00,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:40:00,990 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 71 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:00,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 168 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:40:00,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-18 15:40:00,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 361. [2022-01-18 15:40:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.775) internal successors, (999), 360 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:00,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 999 transitions. [2022-01-18 15:40:00,995 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 999 transitions. Word has length 18 [2022-01-18 15:40:00,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:00,995 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 999 transitions. [2022-01-18 15:40:00,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 23 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:00,995 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 999 transitions. [2022-01-18 15:40:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:40:00,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:00,995 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:01,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-01-18 15:40:01,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:01,196 INFO L402 AbstractCegarLoop]: === Iteration 452 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash 241014275, now seen corresponding path program 431 times [2022-01-18 15:40:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82367964] [2022-01-18 15:40:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:01,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:01,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82367964] [2022-01-18 15:40:01,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82367964] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:01,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724862466] [2022-01-18 15:40:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:01,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:01,460 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:01,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-01-18 15:40:01,486 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:01,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:01,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 15:40:01,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:01,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 94 [2022-01-18 15:40:01,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 76 [2022-01-18 15:40:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:01,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:02,657 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-01-18 15:40:02,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 26 [2022-01-18 15:40:02,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2022-01-18 15:40:02,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:40:02,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-01-18 15:40:02,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 15:40:02,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 10 [2022-01-18 15:40:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:02,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724862466] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:02,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:02,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 25 [2022-01-18 15:40:02,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937323694] [2022-01-18 15:40:02,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:02,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 15:40:02,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:02,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 15:40:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:02,669 INFO L87 Difference]: Start difference. First operand 361 states and 999 transitions. Second operand has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:03,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:03,238 INFO L93 Difference]: Finished difference Result 675 states and 1763 transitions. [2022-01-18 15:40:03,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:03,238 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:03,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:03,239 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:40:03,239 INFO L226 Difference]: Without dead ends: 668 [2022-01-18 15:40:03,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:40:03,239 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:03,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 224 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:40:03,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-01-18 15:40:03,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 361. [2022-01-18 15:40:03,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.775) internal successors, (999), 360 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:03,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 999 transitions. [2022-01-18 15:40:03,244 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 999 transitions. Word has length 18 [2022-01-18 15:40:03,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:03,244 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 999 transitions. [2022-01-18 15:40:03,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.68) internal successors, (42), 25 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:03,244 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 999 transitions. [2022-01-18 15:40:03,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:40:03,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:03,244 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:03,260 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:03,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable451,435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:03,445 INFO L402 AbstractCegarLoop]: === Iteration 453 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:03,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash -330440531, now seen corresponding path program 432 times [2022-01-18 15:40:03,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:03,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329414949] [2022-01-18 15:40:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:03,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:03,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329414949] [2022-01-18 15:40:03,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329414949] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:03,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689427322] [2022-01-18 15:40:03,702 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:03,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:03,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:03,703 INFO L229 MonitoredProcess]: Starting monitored process 436 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:03,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Waiting until timeout for monitored process [2022-01-18 15:40:03,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:03,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:03,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:40:03,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:04,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:04,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 106 [2022-01-18 15:40:04,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:04,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 88 [2022-01-18 15:40:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:04,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:05,048 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:05,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:40:05,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:40:05,062 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:05,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689427322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:05,062 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:05,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-01-18 15:40:05,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212049931] [2022-01-18 15:40:05,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:05,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 15:40:05,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:05,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 15:40:05,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:40:05,063 INFO L87 Difference]: Start difference. First operand 361 states and 999 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:05,284 INFO L93 Difference]: Finished difference Result 554 states and 1458 transitions. [2022-01-18 15:40:05,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:05,284 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:05,285 INFO L225 Difference]: With dead ends: 554 [2022-01-18 15:40:05,285 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 15:40:05,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:40:05,285 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:05,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 178 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 430 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-01-18 15:40:05,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 15:40:05,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 360. [2022-01-18 15:40:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.7743732590529246) internal successors, (996), 359 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 996 transitions. [2022-01-18 15:40:05,289 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 996 transitions. Word has length 18 [2022-01-18 15:40:05,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:05,289 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 996 transitions. [2022-01-18 15:40:05,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:05,289 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 996 transitions. [2022-01-18 15:40:05,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:40:05,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:05,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:05,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (436)] Ended with exit code 0 [2022-01-18 15:40:05,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 436 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable452 [2022-01-18 15:40:05,490 INFO L402 AbstractCegarLoop]: === Iteration 454 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:05,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:05,490 INFO L85 PathProgramCache]: Analyzing trace with hash -865670333, now seen corresponding path program 433 times [2022-01-18 15:40:05,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:05,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401575476] [2022-01-18 15:40:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:05,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:05,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:05,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401575476] [2022-01-18 15:40:05,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401575476] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:05,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588216450] [2022-01-18 15:40:05,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:05,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:05,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:05,784 INFO L229 MonitoredProcess]: Starting monitored process 437 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:05,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Waiting until timeout for monitored process [2022-01-18 15:40:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:05,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:40:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:06,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:40:06,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:40:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:06,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:06,799 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:06,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:40:06,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:40:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:06,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588216450] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:06,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:06,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:40:06,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51431481] [2022-01-18 15:40:06,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:06,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:40:06,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:06,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:40:06,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:40:06,813 INFO L87 Difference]: Start difference. First operand 360 states and 996 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:07,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:07,255 INFO L93 Difference]: Finished difference Result 661 states and 1739 transitions. [2022-01-18 15:40:07,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:07,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:07,256 INFO L225 Difference]: With dead ends: 661 [2022-01-18 15:40:07,256 INFO L226 Difference]: Without dead ends: 654 [2022-01-18 15:40:07,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:40:07,256 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:07,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 172 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:40:07,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-01-18 15:40:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 359. [2022-01-18 15:40:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.7737430167597767) internal successors, (993), 358 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:07,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 993 transitions. [2022-01-18 15:40:07,261 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 993 transitions. Word has length 18 [2022-01-18 15:40:07,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:07,261 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 993 transitions. [2022-01-18 15:40:07,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 993 transitions. [2022-01-18 15:40:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:40:07,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:07,261 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:07,277 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (437)] Ended with exit code 0 [2022-01-18 15:40:07,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 437 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable453 [2022-01-18 15:40:07,462 INFO L402 AbstractCegarLoop]: === Iteration 455 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:07,462 INFO L85 PathProgramCache]: Analyzing trace with hash -277925011, now seen corresponding path program 434 times [2022-01-18 15:40:07,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:07,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005200048] [2022-01-18 15:40:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:07,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:07,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005200048] [2022-01-18 15:40:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005200048] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504187578] [2022-01-18 15:40:07,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:07,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:07,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:07,762 INFO L229 MonitoredProcess]: Starting monitored process 438 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:07,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Waiting until timeout for monitored process [2022-01-18 15:40:07,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:07,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:40:07,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:08,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 100 [2022-01-18 15:40:08,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 82 [2022-01-18 15:40:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:08,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:08,822 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:08,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 99 [2022-01-18 15:40:08,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 76 [2022-01-18 15:40:08,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:08,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504187578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:08,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:08,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-01-18 15:40:08,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902252308] [2022-01-18 15:40:08,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:08,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-18 15:40:08,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:08,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-18 15:40:08,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:40:08,837 INFO L87 Difference]: Start difference. First operand 359 states and 993 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:09,339 INFO L93 Difference]: Finished difference Result 660 states and 1736 transitions. [2022-01-18 15:40:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:09,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:09,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:09,340 INFO L225 Difference]: With dead ends: 660 [2022-01-18 15:40:09,340 INFO L226 Difference]: Without dead ends: 653 [2022-01-18 15:40:09,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:40:09,340 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:09,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 180 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:40:09,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-18 15:40:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 358. [2022-01-18 15:40:09,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.773109243697479) internal successors, (990), 357 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:09,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 990 transitions. [2022-01-18 15:40:09,345 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 990 transitions. Word has length 18 [2022-01-18 15:40:09,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:09,345 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 990 transitions. [2022-01-18 15:40:09,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:09,345 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 990 transitions. [2022-01-18 15:40:09,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 15:40:09,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:09,345 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:09,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (438)] Ended with exit code 0 [2022-01-18 15:40:09,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable454,438 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:09,546 INFO L402 AbstractCegarLoop]: === Iteration 456 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:09,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:09,546 INFO L85 PathProgramCache]: Analyzing trace with hash 319411647, now seen corresponding path program 435 times [2022-01-18 15:40:09,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:09,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564252935] [2022-01-18 15:40:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:09,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:09,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564252935] [2022-01-18 15:40:09,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564252935] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:09,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453080576] [2022-01-18 15:40:09,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:09,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:09,804 INFO L229 MonitoredProcess]: Starting monitored process 439 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:09,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Waiting until timeout for monitored process [2022-01-18 15:40:09,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:09,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:09,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-18 15:40:09,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:10,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 96 [2022-01-18 15:40:10,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 78 [2022-01-18 15:40:10,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:10,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:10,926 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:10,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 100 [2022-01-18 15:40:10,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 77 [2022-01-18 15:40:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:10,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453080576] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:10,940 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:10,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-01-18 15:40:10,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210199971] [2022-01-18 15:40:10,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:10,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-18 15:40:10,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:10,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-18 15:40:10,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:40:10,941 INFO L87 Difference]: Start difference. First operand 358 states and 990 transitions. Second operand has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:11,385 INFO L93 Difference]: Finished difference Result 657 states and 1730 transitions. [2022-01-18 15:40:11,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:11,385 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 15:40:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:11,386 INFO L225 Difference]: With dead ends: 657 [2022-01-18 15:40:11,386 INFO L226 Difference]: Without dead ends: 650 [2022-01-18 15:40:11,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:40:11,387 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 54 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:11,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 218 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 535 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-01-18 15:40:11,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2022-01-18 15:40:11,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 360. [2022-01-18 15:40:11,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.766016713091922) internal successors, (993), 359 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:11,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 993 transitions. [2022-01-18 15:40:11,391 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 993 transitions. Word has length 18 [2022-01-18 15:40:11,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:11,391 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 993 transitions. [2022-01-18 15:40:11,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.75) internal successors, (42), 24 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:11,391 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 993 transitions. [2022-01-18 15:40:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:11,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:11,392 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:11,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (439)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:11,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 439 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2022-01-18 15:40:11,607 INFO L402 AbstractCegarLoop]: === Iteration 457 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:11,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1705594564, now seen corresponding path program 436 times [2022-01-18 15:40:11,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:11,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086253594] [2022-01-18 15:40:11,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:11,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:11,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:11,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086253594] [2022-01-18 15:40:11,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086253594] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:11,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595040628] [2022-01-18 15:40:11,708 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:11,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:11,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:11,709 INFO L229 MonitoredProcess]: Starting monitored process 440 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:11,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Waiting until timeout for monitored process [2022-01-18 15:40:11,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:11,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:11,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:11,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:11,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:40:11,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:40:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:11,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:12,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:12,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:12,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:12,076 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:12,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595040628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:12,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:12,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-01-18 15:40:12,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960490699] [2022-01-18 15:40:12,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:12,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:40:12,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:12,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:40:12,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:40:12,077 INFO L87 Difference]: Start difference. First operand 360 states and 993 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:12,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:12,389 INFO L93 Difference]: Finished difference Result 759 states and 2054 transitions. [2022-01-18 15:40:12,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:40:12,389 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:12,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:12,391 INFO L225 Difference]: With dead ends: 759 [2022-01-18 15:40:12,391 INFO L226 Difference]: Without dead ends: 759 [2022-01-18 15:40:12,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:40:12,391 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:12,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 181 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 473 Invalid, 0 Unknown, 23 Unchecked, 0.2s Time] [2022-01-18 15:40:12,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2022-01-18 15:40:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 366. [2022-01-18 15:40:12,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.756164383561644) internal successors, (1006), 365 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 1006 transitions. [2022-01-18 15:40:12,396 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 1006 transitions. Word has length 19 [2022-01-18 15:40:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:12,396 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 1006 transitions. [2022-01-18 15:40:12,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:12,396 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 1006 transitions. [2022-01-18 15:40:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:12,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:12,397 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:12,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (440)] Ended with exit code 0 [2022-01-18 15:40:12,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 440 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable456 [2022-01-18 15:40:12,597 INFO L402 AbstractCegarLoop]: === Iteration 458 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:12,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:12,597 INFO L85 PathProgramCache]: Analyzing trace with hash -211827476, now seen corresponding path program 437 times [2022-01-18 15:40:12,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:12,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811817319] [2022-01-18 15:40:12,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:12,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:12,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:12,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811817319] [2022-01-18 15:40:12,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811817319] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:12,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807675238] [2022-01-18 15:40:12,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:12,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:12,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:12,703 INFO L229 MonitoredProcess]: Starting monitored process 441 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:12,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Waiting until timeout for monitored process [2022-01-18 15:40:12,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:12,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:12,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:12,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:12,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-01-18 15:40:12,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-01-18 15:40:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:12,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:13,056 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:13,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:13,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:13,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:13,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807675238] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:13,073 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:13,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 16 [2022-01-18 15:40:13,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878999889] [2022-01-18 15:40:13,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:13,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 15:40:13,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:13,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 15:40:13,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-01-18 15:40:13,073 INFO L87 Difference]: Start difference. First operand 366 states and 1006 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:13,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:13,267 INFO L93 Difference]: Finished difference Result 775 states and 2086 transitions. [2022-01-18 15:40:13,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:13,267 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:13,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:13,268 INFO L225 Difference]: With dead ends: 775 [2022-01-18 15:40:13,268 INFO L226 Difference]: Without dead ends: 775 [2022-01-18 15:40:13,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:40:13,268 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:13,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 219 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 471 Invalid, 0 Unknown, 84 Unchecked, 0.2s Time] [2022-01-18 15:40:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-01-18 15:40:13,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 361. [2022-01-18 15:40:13,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 360 states have (on average 2.7666666666666666) internal successors, (996), 360 states have internal predecessors, (996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 996 transitions. [2022-01-18 15:40:13,273 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 996 transitions. Word has length 19 [2022-01-18 15:40:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:13,274 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 996 transitions. [2022-01-18 15:40:13,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 996 transitions. [2022-01-18 15:40:13,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:13,274 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:13,274 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:13,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (441)] Ended with exit code 0 [2022-01-18 15:40:13,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable457 [2022-01-18 15:40:13,475 INFO L402 AbstractCegarLoop]: === Iteration 459 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 265999382, now seen corresponding path program 438 times [2022-01-18 15:40:13,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:13,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960931173] [2022-01-18 15:40:13,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:13,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:13,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:13,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:13,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960931173] [2022-01-18 15:40:13,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960931173] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455048561] [2022-01-18 15:40:13,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:13,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:13,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:13,587 INFO L229 MonitoredProcess]: Starting monitored process 442 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:13,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Waiting until timeout for monitored process [2022-01-18 15:40:13,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:13,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:13,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:13,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:13,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:13,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:13,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:13,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:13,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:13,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:13,968 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:13,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:13,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:13,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455048561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:13,984 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:13,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:13,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342744359] [2022-01-18 15:40:13,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:13,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:13,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:13,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:13,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:13,985 INFO L87 Difference]: Start difference. First operand 361 states and 996 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:14,090 INFO L93 Difference]: Finished difference Result 561 states and 1483 transitions. [2022-01-18 15:40:14,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:14,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:14,091 INFO L225 Difference]: With dead ends: 561 [2022-01-18 15:40:14,091 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 15:40:14,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:14,091 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:14,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 182 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-01-18 15:40:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 15:40:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 369. [2022-01-18 15:40:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.760869565217391) internal successors, (1016), 368 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1016 transitions. [2022-01-18 15:40:14,096 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1016 transitions. Word has length 19 [2022-01-18 15:40:14,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:14,096 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1016 transitions. [2022-01-18 15:40:14,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,096 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1016 transitions. [2022-01-18 15:40:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:14,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:14,097 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:14,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (442)] Ended with exit code 0 [2022-01-18 15:40:14,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 442 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2022-01-18 15:40:14,297 INFO L402 AbstractCegarLoop]: === Iteration 460 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:14,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 437894626, now seen corresponding path program 439 times [2022-01-18 15:40:14,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:14,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578657011] [2022-01-18 15:40:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:14,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:14,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578657011] [2022-01-18 15:40:14,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578657011] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:14,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437937940] [2022-01-18 15:40:14,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:14,402 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:14,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:14,403 INFO L229 MonitoredProcess]: Starting monitored process 443 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:14,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Waiting until timeout for monitored process [2022-01-18 15:40:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:14,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:14,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:14,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:14,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:14,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:14,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:14,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:14,804 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:14,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:14,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437937940] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:14,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:14,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536128722] [2022-01-18 15:40:14,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:14,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:14,822 INFO L87 Difference]: Start difference. First operand 369 states and 1016 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:14,918 INFO L93 Difference]: Finished difference Result 580 states and 1520 transitions. [2022-01-18 15:40:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 15:40:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:14,919 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:40:14,919 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:40:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:14,919 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:14,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 163 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 266 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-01-18 15:40:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:40:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 362. [2022-01-18 15:40:14,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.7673130193905817) internal successors, (999), 361 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 999 transitions. [2022-01-18 15:40:14,923 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 999 transitions. Word has length 19 [2022-01-18 15:40:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:14,923 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 999 transitions. [2022-01-18 15:40:14,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 999 transitions. [2022-01-18 15:40:14,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:14,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:14,924 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:14,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (443)] Ended with exit code 0 [2022-01-18 15:40:15,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable459,443 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:15,140 INFO L402 AbstractCegarLoop]: === Iteration 461 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:15,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1681577012, now seen corresponding path program 440 times [2022-01-18 15:40:15,140 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:15,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995444160] [2022-01-18 15:40:15,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:15,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:15,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:15,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:15,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995444160] [2022-01-18 15:40:15,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995444160] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712297051] [2022-01-18 15:40:15,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:15,247 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:15,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:15,248 INFO L229 MonitoredProcess]: Starting monitored process 444 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:15,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Waiting until timeout for monitored process [2022-01-18 15:40:15,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:15,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:15,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:15,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:15,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:15,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:15,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:15,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:15,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:15,669 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:15,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:15,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712297051] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:15,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:15,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:15,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145520006] [2022-01-18 15:40:15,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:15,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:15,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:15,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:15,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:15,689 INFO L87 Difference]: Start difference. First operand 362 states and 999 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:15,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:15,911 INFO L93 Difference]: Finished difference Result 568 states and 1480 transitions. [2022-01-18 15:40:15,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:40:15,911 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:15,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:15,912 INFO L225 Difference]: With dead ends: 568 [2022-01-18 15:40:15,912 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:40:15,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:40:15,912 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:15,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 181 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 322 Invalid, 0 Unknown, 122 Unchecked, 0.1s Time] [2022-01-18 15:40:15,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:40:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 364. [2022-01-18 15:40:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 2.757575757575758) internal successors, (1001), 363 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 1001 transitions. [2022-01-18 15:40:15,916 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 1001 transitions. Word has length 19 [2022-01-18 15:40:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:15,916 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 1001 transitions. [2022-01-18 15:40:15,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 1001 transitions. [2022-01-18 15:40:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:15,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:15,917 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:15,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (444)] Ended with exit code 0 [2022-01-18 15:40:16,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,444 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:16,117 INFO L402 AbstractCegarLoop]: === Iteration 462 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1660166894, now seen corresponding path program 441 times [2022-01-18 15:40:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690705437] [2022-01-18 15:40:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:16,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:16,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:16,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690705437] [2022-01-18 15:40:16,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690705437] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136816314] [2022-01-18 15:40:16,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:16,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:16,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:16,226 INFO L229 MonitoredProcess]: Starting monitored process 445 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:16,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Waiting until timeout for monitored process [2022-01-18 15:40:16,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:16,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:16,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:16,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:16,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:16,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:16,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:16,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:16,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:16,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:16,713 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:16,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:16,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:16,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136816314] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:16,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:16,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:16,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999051963] [2022-01-18 15:40:16,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:16,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:16,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:16,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:16,734 INFO L87 Difference]: Start difference. First operand 364 states and 1001 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:16,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:16,968 INFO L93 Difference]: Finished difference Result 554 states and 1459 transitions. [2022-01-18 15:40:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:40:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:16,969 INFO L225 Difference]: With dead ends: 554 [2022-01-18 15:40:16,969 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:40:16,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:40:16,969 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:16,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 158 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-01-18 15:40:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:40:16,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 362. [2022-01-18 15:40:16,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.7645429362880884) internal successors, (998), 361 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:16,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 998 transitions. [2022-01-18 15:40:16,973 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 998 transitions. Word has length 19 [2022-01-18 15:40:16,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:16,974 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 998 transitions. [2022-01-18 15:40:16,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:16,974 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 998 transitions. [2022-01-18 15:40:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:16,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:16,974 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:16,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (445)] Ended with exit code 0 [2022-01-18 15:40:17,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,445 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:17,174 INFO L402 AbstractCegarLoop]: === Iteration 463 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:17,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2083267898, now seen corresponding path program 442 times [2022-01-18 15:40:17,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:17,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493538979] [2022-01-18 15:40:17,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:17,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:17,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:17,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:17,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493538979] [2022-01-18 15:40:17,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493538979] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:17,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602106263] [2022-01-18 15:40:17,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:17,281 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:17,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:17,282 INFO L229 MonitoredProcess]: Starting monitored process 446 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:17,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Waiting until timeout for monitored process [2022-01-18 15:40:17,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:17,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:17,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:17,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:17,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:17,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:17,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:17,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:17,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:17,668 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:17,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:17,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:17,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602106263] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:17,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:17,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:17,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521223674] [2022-01-18 15:40:17,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:17,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:17,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:17,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:17,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:17,685 INFO L87 Difference]: Start difference. First operand 362 states and 998 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:17,784 INFO L93 Difference]: Finished difference Result 559 states and 1478 transitions. [2022-01-18 15:40:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:17,785 INFO L225 Difference]: With dead ends: 559 [2022-01-18 15:40:17,785 INFO L226 Difference]: Without dead ends: 559 [2022-01-18 15:40:17,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:17,786 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:17,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 157 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 284 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-18 15:40:17,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-18 15:40:17,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 367. [2022-01-18 15:40:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.762295081967213) internal successors, (1011), 366 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1011 transitions. [2022-01-18 15:40:17,790 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1011 transitions. Word has length 19 [2022-01-18 15:40:17,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:17,790 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1011 transitions. [2022-01-18 15:40:17,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:17,790 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1011 transitions. [2022-01-18 15:40:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:17,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:17,790 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:17,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (446)] Ended with exit code 0 [2022-01-18 15:40:17,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable462,446 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:17,991 INFO L402 AbstractCegarLoop]: === Iteration 464 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:17,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:17,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1911372654, now seen corresponding path program 443 times [2022-01-18 15:40:17,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:17,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167796634] [2022-01-18 15:40:17,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:17,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:18,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167796634] [2022-01-18 15:40:18,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167796634] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:18,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407500209] [2022-01-18 15:40:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:18,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:18,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:18,101 INFO L229 MonitoredProcess]: Starting monitored process 447 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:18,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Waiting until timeout for monitored process [2022-01-18 15:40:18,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:18,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:18,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:18,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:18,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:18,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:18,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:18,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:18,514 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:18,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:18,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:18,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407500209] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:18,530 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:18,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:18,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885307667] [2022-01-18 15:40:18,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:18,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:18,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:18,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:18,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:18,531 INFO L87 Difference]: Start difference. First operand 367 states and 1011 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:18,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:18,611 INFO L93 Difference]: Finished difference Result 571 states and 1502 transitions. [2022-01-18 15:40:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:18,612 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:40:18,612 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:40:18,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:18,613 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:18,613 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 197 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2022-01-18 15:40:18,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:40:18,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 365. [2022-01-18 15:40:18,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 2.7664835164835164) internal successors, (1007), 364 states have internal predecessors, (1007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:18,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 1007 transitions. [2022-01-18 15:40:18,617 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 1007 transitions. Word has length 19 [2022-01-18 15:40:18,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:18,617 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 1007 transitions. [2022-01-18 15:40:18,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:18,617 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 1007 transitions. [2022-01-18 15:40:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:18,617 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:18,617 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:18,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (447)] Ended with exit code 0 [2022-01-18 15:40:18,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable463 [2022-01-18 15:40:18,818 INFO L402 AbstractCegarLoop]: === Iteration 465 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1700547510, now seen corresponding path program 444 times [2022-01-18 15:40:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819591089] [2022-01-18 15:40:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:18,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:18,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819591089] [2022-01-18 15:40:18,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819591089] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:18,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019435916] [2022-01-18 15:40:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:18,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:18,925 INFO L229 MonitoredProcess]: Starting monitored process 448 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:18,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Waiting until timeout for monitored process [2022-01-18 15:40:18,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:18,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:18,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:18,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:19,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:19,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:19,180 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:19,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:19,312 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:19,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:19,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:19,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019435916] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:19,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:19,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:19,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848695638] [2022-01-18 15:40:19,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:19,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:19,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:19,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:19,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:19,329 INFO L87 Difference]: Start difference. First operand 365 states and 1007 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:19,442 INFO L93 Difference]: Finished difference Result 589 states and 1528 transitions. [2022-01-18 15:40:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:19,442 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:19,443 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:40:19,443 INFO L226 Difference]: Without dead ends: 589 [2022-01-18 15:40:19,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:19,443 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 49 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:19,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 172 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 316 Invalid, 0 Unknown, 115 Unchecked, 0.1s Time] [2022-01-18 15:40:19,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-01-18 15:40:19,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 367. [2022-01-18 15:40:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.76775956284153) internal successors, (1013), 366 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:19,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1013 transitions. [2022-01-18 15:40:19,447 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1013 transitions. Word has length 19 [2022-01-18 15:40:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:19,447 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1013 transitions. [2022-01-18 15:40:19,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1013 transitions. [2022-01-18 15:40:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:19,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:19,448 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:19,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (448)] Ended with exit code 0 [2022-01-18 15:40:19,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2022-01-18 15:40:19,648 INFO L402 AbstractCegarLoop]: === Iteration 466 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:19,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:19,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1528652266, now seen corresponding path program 445 times [2022-01-18 15:40:19,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:19,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272098880] [2022-01-18 15:40:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:19,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:19,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272098880] [2022-01-18 15:40:19,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272098880] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:19,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654158113] [2022-01-18 15:40:19,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:19,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:19,754 INFO L229 MonitoredProcess]: Starting monitored process 449 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:19,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Waiting until timeout for monitored process [2022-01-18 15:40:19,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:19,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:19,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:19,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:19,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:20,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:20,150 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:20,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:20,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:20,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:20,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654158113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:20,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:20,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:20,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147726488] [2022-01-18 15:40:20,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:20,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:20,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:20,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:20,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:20,169 INFO L87 Difference]: Start difference. First operand 367 states and 1013 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:20,245 INFO L93 Difference]: Finished difference Result 561 states and 1482 transitions. [2022-01-18 15:40:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:20,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:20,246 INFO L225 Difference]: With dead ends: 561 [2022-01-18 15:40:20,246 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 15:40:20,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:20,246 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:20,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 158 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 196 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2022-01-18 15:40:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 15:40:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 367. [2022-01-18 15:40:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.76775956284153) internal successors, (1013), 366 states have internal predecessors, (1013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1013 transitions. [2022-01-18 15:40:20,251 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1013 transitions. Word has length 19 [2022-01-18 15:40:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:20,251 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1013 transitions. [2022-01-18 15:40:20,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1013 transitions. [2022-01-18 15:40:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:20,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:20,251 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:20,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (449)] Ended with exit code 0 [2022-01-18 15:40:20,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable465 [2022-01-18 15:40:20,452 INFO L402 AbstractCegarLoop]: === Iteration 467 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:20,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:20,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1040495696, now seen corresponding path program 446 times [2022-01-18 15:40:20,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:20,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366024297] [2022-01-18 15:40:20,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:20,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366024297] [2022-01-18 15:40:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366024297] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:20,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610872146] [2022-01-18 15:40:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:20,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:20,561 INFO L229 MonitoredProcess]: Starting monitored process 450 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:20,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Waiting until timeout for monitored process [2022-01-18 15:40:20,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:20,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:20,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:20,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:20,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:20,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:20,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:20,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:20,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:21,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:21,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:21,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:21,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610872146] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:21,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:21,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:21,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457939189] [2022-01-18 15:40:21,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:21,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:21,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:21,024 INFO L87 Difference]: Start difference. First operand 367 states and 1013 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:21,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:21,264 INFO L93 Difference]: Finished difference Result 562 states and 1480 transitions. [2022-01-18 15:40:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:40:21,265 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:21,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:21,265 INFO L225 Difference]: With dead ends: 562 [2022-01-18 15:40:21,265 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 15:40:21,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:40:21,266 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:21,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 184 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 306 Invalid, 0 Unknown, 157 Unchecked, 0.1s Time] [2022-01-18 15:40:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 15:40:21,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 371. [2022-01-18 15:40:21,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.7513513513513512) internal successors, (1018), 370 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:21,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1018 transitions. [2022-01-18 15:40:21,270 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1018 transitions. Word has length 19 [2022-01-18 15:40:21,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:21,270 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1018 transitions. [2022-01-18 15:40:21,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:21,270 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1018 transitions. [2022-01-18 15:40:21,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:21,270 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:21,270 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:21,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (450)] Ended with exit code 0 [2022-01-18 15:40:21,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 450 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2022-01-18 15:40:21,471 INFO L402 AbstractCegarLoop]: === Iteration 468 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:21,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1193956914, now seen corresponding path program 447 times [2022-01-18 15:40:21,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:21,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385406272] [2022-01-18 15:40:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:21,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:21,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:21,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:21,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385406272] [2022-01-18 15:40:21,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385406272] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:21,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20614818] [2022-01-18 15:40:21,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:21,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:21,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:21,580 INFO L229 MonitoredProcess]: Starting monitored process 451 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:21,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Waiting until timeout for monitored process [2022-01-18 15:40:21,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:21,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:21,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:21,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:21,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:21,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:21,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:21,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:22,063 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:22,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:22,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:22,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20614818] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:22,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:22,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:22,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499160810] [2022-01-18 15:40:22,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:22,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:22,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:22,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:22,084 INFO L87 Difference]: Start difference. First operand 371 states and 1018 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:22,339 INFO L93 Difference]: Finished difference Result 580 states and 1510 transitions. [2022-01-18 15:40:22,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:40:22,339 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:22,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:22,340 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:40:22,340 INFO L226 Difference]: Without dead ends: 574 [2022-01-18 15:40:22,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:22,340 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 43 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:22,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 217 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 306 Invalid, 0 Unknown, 237 Unchecked, 0.1s Time] [2022-01-18 15:40:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2022-01-18 15:40:22,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 367. [2022-01-18 15:40:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.7650273224043715) internal successors, (1012), 366 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:22,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 1012 transitions. [2022-01-18 15:40:22,345 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 1012 transitions. Word has length 19 [2022-01-18 15:40:22,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:22,345 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 1012 transitions. [2022-01-18 15:40:22,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:22,345 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 1012 transitions. [2022-01-18 15:40:22,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:22,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:22,345 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:22,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (451)] Ended with exit code 0 [2022-01-18 15:40:22,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,451 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:22,546 INFO L402 AbstractCegarLoop]: === Iteration 469 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:22,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:22,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1581727254, now seen corresponding path program 448 times [2022-01-18 15:40:22,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:22,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444972236] [2022-01-18 15:40:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:22,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:22,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:22,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444972236] [2022-01-18 15:40:22,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444972236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:22,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198682706] [2022-01-18 15:40:22,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:22,654 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:22,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:22,654 INFO L229 MonitoredProcess]: Starting monitored process 452 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:22,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Waiting until timeout for monitored process [2022-01-18 15:40:22,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:22,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:22,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:22,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:22,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:22,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:22,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:23,044 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:23,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:23,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:23,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198682706] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:23,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:23,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:23,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187793222] [2022-01-18 15:40:23,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:23,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:23,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:23,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:23,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:23,061 INFO L87 Difference]: Start difference. First operand 367 states and 1012 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:23,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:23,154 INFO L93 Difference]: Finished difference Result 585 states and 1523 transitions. [2022-01-18 15:40:23,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:23,155 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:23,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:23,155 INFO L225 Difference]: With dead ends: 585 [2022-01-18 15:40:23,155 INFO L226 Difference]: Without dead ends: 585 [2022-01-18 15:40:23,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:23,156 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 43 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:23,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 194 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 179 Unchecked, 0.1s Time] [2022-01-18 15:40:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2022-01-18 15:40:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 369. [2022-01-18 15:40:23,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.766304347826087) internal successors, (1018), 368 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:23,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1018 transitions. [2022-01-18 15:40:23,160 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1018 transitions. Word has length 19 [2022-01-18 15:40:23,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:23,160 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1018 transitions. [2022-01-18 15:40:23,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:23,160 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1018 transitions. [2022-01-18 15:40:23,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:23,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:23,161 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:23,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (452)] Ended with exit code 0 [2022-01-18 15:40:23,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,452 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:23,361 INFO L402 AbstractCegarLoop]: === Iteration 470 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:23,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1753622498, now seen corresponding path program 449 times [2022-01-18 15:40:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:23,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107127356] [2022-01-18 15:40:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:23,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:23,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:23,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107127356] [2022-01-18 15:40:23,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107127356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:23,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303494258] [2022-01-18 15:40:23,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:23,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:23,475 INFO L229 MonitoredProcess]: Starting monitored process 453 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:23,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Waiting until timeout for monitored process [2022-01-18 15:40:23,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:40:23,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:23,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:23,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:23,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:23,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:23,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:23,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:23,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:23,894 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:23,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:23,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:23,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303494258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:23,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:23,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:23,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608259024] [2022-01-18 15:40:23,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:23,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:23,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:23,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:23,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:23,912 INFO L87 Difference]: Start difference. First operand 369 states and 1018 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:24,002 INFO L93 Difference]: Finished difference Result 569 states and 1501 transitions. [2022-01-18 15:40:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:24,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:24,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:24,004 INFO L225 Difference]: With dead ends: 569 [2022-01-18 15:40:24,004 INFO L226 Difference]: Without dead ends: 569 [2022-01-18 15:40:24,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:24,004 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 195 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:24,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 159 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 195 Unchecked, 0.1s Time] [2022-01-18 15:40:24,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-18 15:40:24,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 368. [2022-01-18 15:40:24,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.76566757493188) internal successors, (1015), 367 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:24,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1015 transitions. [2022-01-18 15:40:24,008 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1015 transitions. Word has length 19 [2022-01-18 15:40:24,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:24,008 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1015 transitions. [2022-01-18 15:40:24,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:24,009 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1015 transitions. [2022-01-18 15:40:24,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:24,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:24,009 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:24,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (453)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:24,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,453 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:24,209 INFO L402 AbstractCegarLoop]: === Iteration 471 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:24,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:24,210 INFO L85 PathProgramCache]: Analyzing trace with hash 19925836, now seen corresponding path program 450 times [2022-01-18 15:40:24,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:24,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615925310] [2022-01-18 15:40:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:24,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:24,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615925310] [2022-01-18 15:40:24,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615925310] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:24,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262946034] [2022-01-18 15:40:24,331 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:24,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:24,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:24,332 INFO L229 MonitoredProcess]: Starting monitored process 454 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:24,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Waiting until timeout for monitored process [2022-01-18 15:40:24,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:24,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:24,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:24,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:24,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:24,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:24,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:24,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:24,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:24,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:24,805 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:24,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:24,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:24,824 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:24,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262946034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:24,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:24,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:24,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451561122] [2022-01-18 15:40:24,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:24,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:24,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:24,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:24,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:24,825 INFO L87 Difference]: Start difference. First operand 368 states and 1015 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:25,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:25,066 INFO L93 Difference]: Finished difference Result 589 states and 1526 transitions. [2022-01-18 15:40:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:40:25,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:25,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:25,067 INFO L225 Difference]: With dead ends: 589 [2022-01-18 15:40:25,067 INFO L226 Difference]: Without dead ends: 586 [2022-01-18 15:40:25,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:40:25,067 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:25,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 233 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 292 Invalid, 0 Unknown, 239 Unchecked, 0.1s Time] [2022-01-18 15:40:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-01-18 15:40:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 370. [2022-01-18 15:40:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.7560975609756095) internal successors, (1017), 369 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1017 transitions. [2022-01-18 15:40:25,072 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1017 transitions. Word has length 19 [2022-01-18 15:40:25,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:25,072 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1017 transitions. [2022-01-18 15:40:25,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1017 transitions. [2022-01-18 15:40:25,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:25,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:25,072 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:25,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (454)] Ended with exit code 0 [2022-01-18 15:40:25,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,454 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:25,272 INFO L402 AbstractCegarLoop]: === Iteration 472 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 173387054, now seen corresponding path program 451 times [2022-01-18 15:40:25,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:25,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271708137] [2022-01-18 15:40:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:25,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:25,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271708137] [2022-01-18 15:40:25,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271708137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:25,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105081944] [2022-01-18 15:40:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:25,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:25,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:25,378 INFO L229 MonitoredProcess]: Starting monitored process 455 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:25,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Waiting until timeout for monitored process [2022-01-18 15:40:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:25,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:25,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:25,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:25,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:25,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:25,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:25,842 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:25,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:25,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:25,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:25,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105081944] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:25,862 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:25,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:25,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855318610] [2022-01-18 15:40:25,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:25,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:25,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:25,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:25,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:25,862 INFO L87 Difference]: Start difference. First operand 370 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:26,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:26,188 INFO L93 Difference]: Finished difference Result 682 states and 1785 transitions. [2022-01-18 15:40:26,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:40:26,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:26,189 INFO L225 Difference]: With dead ends: 682 [2022-01-18 15:40:26,189 INFO L226 Difference]: Without dead ends: 678 [2022-01-18 15:40:26,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:40:26,190 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 49 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:26,190 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 163 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 376 Invalid, 0 Unknown, 121 Unchecked, 0.1s Time] [2022-01-18 15:40:26,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2022-01-18 15:40:26,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 368. [2022-01-18 15:40:26,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.7629427792915533) internal successors, (1014), 367 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:26,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 1014 transitions. [2022-01-18 15:40:26,194 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 1014 transitions. Word has length 19 [2022-01-18 15:40:26,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:26,194 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 1014 transitions. [2022-01-18 15:40:26,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:26,195 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 1014 transitions. [2022-01-18 15:40:26,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:26,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:26,195 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:26,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (455)] Ended with exit code 0 [2022-01-18 15:40:26,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,455 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:26,395 INFO L402 AbstractCegarLoop]: === Iteration 473 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:26,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:26,396 INFO L85 PathProgramCache]: Analyzing trace with hash -516804410, now seen corresponding path program 452 times [2022-01-18 15:40:26,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:26,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273499354] [2022-01-18 15:40:26,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:26,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:26,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273499354] [2022-01-18 15:40:26,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273499354] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:26,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980043716] [2022-01-18 15:40:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:26,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:26,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:26,500 INFO L229 MonitoredProcess]: Starting monitored process 456 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:26,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Waiting until timeout for monitored process [2022-01-18 15:40:26,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:26,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:26,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:26,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:26,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:26,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:26,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:26,868 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:26,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:26,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:26,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:26,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980043716] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:26,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:26,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:26,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412316478] [2022-01-18 15:40:26,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:26,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:26,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:26,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:26,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:26,886 INFO L87 Difference]: Start difference. First operand 368 states and 1014 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:27,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:27,136 INFO L93 Difference]: Finished difference Result 584 states and 1522 transitions. [2022-01-18 15:40:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:40:27,136 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:27,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:27,137 INFO L225 Difference]: With dead ends: 584 [2022-01-18 15:40:27,137 INFO L226 Difference]: Without dead ends: 584 [2022-01-18 15:40:27,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:27,137 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:27,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 215 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 354 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-01-18 15:40:27,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-18 15:40:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 369. [2022-01-18 15:40:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.766304347826087) internal successors, (1018), 368 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1018 transitions. [2022-01-18 15:40:27,142 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1018 transitions. Word has length 19 [2022-01-18 15:40:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:27,142 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1018 transitions. [2022-01-18 15:40:27,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1018 transitions. [2022-01-18 15:40:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:27,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:27,142 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:27,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (456)] Ended with exit code 0 [2022-01-18 15:40:27,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,456 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:27,343 INFO L402 AbstractCegarLoop]: === Iteration 474 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:27,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:27,343 INFO L85 PathProgramCache]: Analyzing trace with hash 402646224, now seen corresponding path program 453 times [2022-01-18 15:40:27,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:27,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746442323] [2022-01-18 15:40:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:27,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:27,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:27,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746442323] [2022-01-18 15:40:27,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746442323] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:27,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545232666] [2022-01-18 15:40:27,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:27,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:27,449 INFO L229 MonitoredProcess]: Starting monitored process 457 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:27,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Waiting until timeout for monitored process [2022-01-18 15:40:27,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:27,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:27,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:27,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:27,697 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:27,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:27,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:27,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:27,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:27,862 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:27,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:27,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:27,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:27,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545232666] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:27,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:27,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:27,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243651634] [2022-01-18 15:40:27,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:27,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:27,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:27,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:27,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:27,882 INFO L87 Difference]: Start difference. First operand 369 states and 1018 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:28,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:28,542 INFO L93 Difference]: Finished difference Result 602 states and 1550 transitions. [2022-01-18 15:40:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:40:28,543 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:28,543 INFO L225 Difference]: With dead ends: 602 [2022-01-18 15:40:28,544 INFO L226 Difference]: Without dead ends: 599 [2022-01-18 15:40:28,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=955, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:40:28,544 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 96 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 210 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:28,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 206 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 456 Invalid, 0 Unknown, 210 Unchecked, 0.2s Time] [2022-01-18 15:40:28,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-01-18 15:40:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 369. [2022-01-18 15:40:28,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.7635869565217392) internal successors, (1017), 368 states have internal predecessors, (1017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:28,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1017 transitions. [2022-01-18 15:40:28,548 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1017 transitions. Word has length 19 [2022-01-18 15:40:28,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:28,548 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1017 transitions. [2022-01-18 15:40:28,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:28,548 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1017 transitions. [2022-01-18 15:40:28,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:28,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:28,549 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:28,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (457)] Ended with exit code 0 [2022-01-18 15:40:28,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,457 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:28,749 INFO L402 AbstractCegarLoop]: === Iteration 475 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:28,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:28,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1103720012, now seen corresponding path program 454 times [2022-01-18 15:40:28,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:28,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747256822] [2022-01-18 15:40:28,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:28,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:28,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:28,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:28,858 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:28,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747256822] [2022-01-18 15:40:28,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747256822] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:28,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922721802] [2022-01-18 15:40:28,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:28,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:28,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:28,859 INFO L229 MonitoredProcess]: Starting monitored process 458 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:28,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Waiting until timeout for monitored process [2022-01-18 15:40:28,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:28,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:28,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:28,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:29,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:29,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:29,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:29,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:29,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:29,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:29,232 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:29,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2022-01-18 15:40:29,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-01-18 15:40:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922721802] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:29,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:29,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:29,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719283325] [2022-01-18 15:40:29,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:29,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:29,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:29,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:29,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:29,249 INFO L87 Difference]: Start difference. First operand 369 states and 1017 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:29,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:29,469 INFO L93 Difference]: Finished difference Result 623 states and 1598 transitions. [2022-01-18 15:40:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:40:29,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:29,470 INFO L225 Difference]: With dead ends: 623 [2022-01-18 15:40:29,470 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 15:40:29,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:29,470 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:29,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 179 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 356 Invalid, 0 Unknown, 173 Unchecked, 0.1s Time] [2022-01-18 15:40:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 15:40:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 369. [2022-01-18 15:40:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.760869565217391) internal successors, (1016), 368 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1016 transitions. [2022-01-18 15:40:29,475 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1016 transitions. Word has length 19 [2022-01-18 15:40:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:29,475 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1016 transitions. [2022-01-18 15:40:29,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:29,475 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1016 transitions. [2022-01-18 15:40:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:29,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:29,475 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:29,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (458)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:29,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable474 [2022-01-18 15:40:29,676 INFO L402 AbstractCegarLoop]: === Iteration 476 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:29,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:29,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1523370700, now seen corresponding path program 455 times [2022-01-18 15:40:29,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:29,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374568430] [2022-01-18 15:40:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:29,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:29,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:29,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:29,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374568430] [2022-01-18 15:40:29,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374568430] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:29,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101449868] [2022-01-18 15:40:29,777 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:29,778 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:29,778 INFO L229 MonitoredProcess]: Starting monitored process 459 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:29,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Waiting until timeout for monitored process [2022-01-18 15:40:29,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:40:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:30,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:30,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:30,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:30,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:30,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:30,159 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:30,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:40:30,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:30,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101449868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:30,179 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:30,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:30,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568857209] [2022-01-18 15:40:30,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:30,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:30,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:30,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:30,180 INFO L87 Difference]: Start difference. First operand 369 states and 1016 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:30,531 INFO L93 Difference]: Finished difference Result 564 states and 1489 transitions. [2022-01-18 15:40:30,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 15:40:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:30,532 INFO L225 Difference]: With dead ends: 564 [2022-01-18 15:40:30,532 INFO L226 Difference]: Without dead ends: 564 [2022-01-18 15:40:30,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:40:30,533 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:30,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 144 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 395 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-01-18 15:40:30,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-18 15:40:30,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 369. [2022-01-18 15:40:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.760869565217391) internal successors, (1016), 368 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:30,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1016 transitions. [2022-01-18 15:40:30,537 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1016 transitions. Word has length 19 [2022-01-18 15:40:30,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:30,537 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1016 transitions. [2022-01-18 15:40:30,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:30,537 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1016 transitions. [2022-01-18 15:40:30,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:30,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:30,537 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:30,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (459)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:30,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 459 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable475 [2022-01-18 15:40:30,738 INFO L402 AbstractCegarLoop]: === Iteration 477 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:30,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:30,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1714199612, now seen corresponding path program 456 times [2022-01-18 15:40:30,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:30,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403939654] [2022-01-18 15:40:30,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:30,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:30,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403939654] [2022-01-18 15:40:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403939654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742151325] [2022-01-18 15:40:30,842 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:30,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:30,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:30,843 INFO L229 MonitoredProcess]: Starting monitored process 460 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:30,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Waiting until timeout for monitored process [2022-01-18 15:40:30,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:30,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:30,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:31,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:31,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:31,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:31,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:31,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:31,188 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:31,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:31,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:31,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742151325] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:31,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:31,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:31,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471742534] [2022-01-18 15:40:31,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:31,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:31,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:31,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:31,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:31,213 INFO L87 Difference]: Start difference. First operand 369 states and 1016 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:31,321 INFO L93 Difference]: Finished difference Result 501 states and 1305 transitions. [2022-01-18 15:40:31,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:31,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:31,322 INFO L225 Difference]: With dead ends: 501 [2022-01-18 15:40:31,322 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:40:31,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:31,323 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:31,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 156 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 294 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-01-18 15:40:31,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:40:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 376. [2022-01-18 15:40:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.7546666666666666) internal successors, (1033), 375 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1033 transitions. [2022-01-18 15:40:31,327 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1033 transitions. Word has length 19 [2022-01-18 15:40:31,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:31,327 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1033 transitions. [2022-01-18 15:40:31,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:31,327 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1033 transitions. [2022-01-18 15:40:31,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:31,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:31,327 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:31,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (460)] Ended with exit code 0 [2022-01-18 15:40:31,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 460 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable476 [2022-01-18 15:40:31,528 INFO L402 AbstractCegarLoop]: === Iteration 478 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:31,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1560738394, now seen corresponding path program 457 times [2022-01-18 15:40:31,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:31,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117222298] [2022-01-18 15:40:31,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:31,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:31,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:31,628 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117222298] [2022-01-18 15:40:31,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117222298] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:31,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699649710] [2022-01-18 15:40:31,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:31,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:31,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:31,629 INFO L229 MonitoredProcess]: Starting monitored process 461 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:31,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Waiting until timeout for monitored process [2022-01-18 15:40:31,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:31,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:31,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:31,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:31,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:31,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:31,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:31,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:32,007 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:32,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:32,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699649710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:32,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:32,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:32,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936656180] [2022-01-18 15:40:32,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:32,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:32,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:32,034 INFO L87 Difference]: Start difference. First operand 376 states and 1033 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:32,114 INFO L93 Difference]: Finished difference Result 504 states and 1308 transitions. [2022-01-18 15:40:32,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:32,114 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:32,115 INFO L225 Difference]: With dead ends: 504 [2022-01-18 15:40:32,115 INFO L226 Difference]: Without dead ends: 504 [2022-01-18 15:40:32,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:32,115 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:32,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 170 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 202 Invalid, 0 Unknown, 139 Unchecked, 0.1s Time] [2022-01-18 15:40:32,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-18 15:40:32,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 372. [2022-01-18 15:40:32,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.7628032345013476) internal successors, (1025), 371 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1025 transitions. [2022-01-18 15:40:32,119 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1025 transitions. Word has length 19 [2022-01-18 15:40:32,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:32,119 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1025 transitions. [2022-01-18 15:40:32,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,119 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1025 transitions. [2022-01-18 15:40:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:32,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:32,119 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:32,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (461)] Ended with exit code 0 [2022-01-18 15:40:32,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable477 [2022-01-18 15:40:32,320 INFO L402 AbstractCegarLoop]: === Iteration 479 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:32,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:32,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1560197824, now seen corresponding path program 458 times [2022-01-18 15:40:32,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:32,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209605863] [2022-01-18 15:40:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:32,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:32,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209605863] [2022-01-18 15:40:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209605863] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888588186] [2022-01-18 15:40:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:32,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:32,431 INFO L229 MonitoredProcess]: Starting monitored process 462 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:32,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Waiting until timeout for monitored process [2022-01-18 15:40:32,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:32,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:32,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:32,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:32,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:32,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:32,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:32,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:32,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:32,822 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:32,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:32,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:32,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888588186] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:32,850 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:32,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:32,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174584518] [2022-01-18 15:40:32,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:32,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:32,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:32,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:32,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:32,850 INFO L87 Difference]: Start difference. First operand 372 states and 1025 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:32,966 INFO L93 Difference]: Finished difference Result 516 states and 1334 transitions. [2022-01-18 15:40:32,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:32,967 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:32,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:32,967 INFO L225 Difference]: With dead ends: 516 [2022-01-18 15:40:32,967 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 15:40:32,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:32,968 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:32,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 196 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 294 Unchecked, 0.1s Time] [2022-01-18 15:40:32,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 15:40:32,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 370. [2022-01-18 15:40:32,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.761517615176152) internal successors, (1019), 369 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1019 transitions. [2022-01-18 15:40:32,972 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1019 transitions. Word has length 19 [2022-01-18 15:40:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:32,972 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1019 transitions. [2022-01-18 15:40:32,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1019 transitions. [2022-01-18 15:40:32,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:32,972 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:32,972 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:32,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (462)] Ended with exit code 0 [2022-01-18 15:40:33,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable478,462 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:33,173 INFO L402 AbstractCegarLoop]: === Iteration 480 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:33,173 INFO L85 PathProgramCache]: Analyzing trace with hash 633191290, now seen corresponding path program 459 times [2022-01-18 15:40:33,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:33,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018568623] [2022-01-18 15:40:33,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:33,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:33,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:33,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018568623] [2022-01-18 15:40:33,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018568623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:33,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083660841] [2022-01-18 15:40:33,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:33,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:33,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:33,280 INFO L229 MonitoredProcess]: Starting monitored process 463 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:33,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Waiting until timeout for monitored process [2022-01-18 15:40:33,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:33,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:33,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:33,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:33,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:33,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:33,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:33,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:33,666 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:33,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:33,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:33,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083660841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:33,693 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:33,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:33,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90061492] [2022-01-18 15:40:33,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:33,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:33,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:33,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:33,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:33,693 INFO L87 Difference]: Start difference. First operand 370 states and 1019 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:33,830 INFO L93 Difference]: Finished difference Result 497 states and 1290 transitions. [2022-01-18 15:40:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:33,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:33,831 INFO L225 Difference]: With dead ends: 497 [2022-01-18 15:40:33,831 INFO L226 Difference]: Without dead ends: 491 [2022-01-18 15:40:33,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:33,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 37 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:33,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 168 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-01-18 15:40:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-18 15:40:33,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 376. [2022-01-18 15:40:33,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.7413333333333334) internal successors, (1028), 375 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:33,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1028 transitions. [2022-01-18 15:40:33,835 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1028 transitions. Word has length 19 [2022-01-18 15:40:33,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:33,835 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 1028 transitions. [2022-01-18 15:40:33,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:33,835 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1028 transitions. [2022-01-18 15:40:33,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:33,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:33,836 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:33,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (463)] Ended with exit code 0 [2022-01-18 15:40:34,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable479 [2022-01-18 15:40:34,036 INFO L402 AbstractCegarLoop]: === Iteration 481 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:34,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:34,036 INFO L85 PathProgramCache]: Analyzing trace with hash 786652508, now seen corresponding path program 460 times [2022-01-18 15:40:34,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:34,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598434016] [2022-01-18 15:40:34,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:34,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:34,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:34,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:34,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598434016] [2022-01-18 15:40:34,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598434016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:34,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858950111] [2022-01-18 15:40:34,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:34,138 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:34,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:34,139 INFO L229 MonitoredProcess]: Starting monitored process 464 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:34,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Waiting until timeout for monitored process [2022-01-18 15:40:34,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:34,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:34,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:34,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:34,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:34,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:34,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:34,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:34,535 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:34,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:34,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:34,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858950111] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:34,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:34,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:34,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929043198] [2022-01-18 15:40:34,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:34,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:34,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:34,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:34,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:34,564 INFO L87 Difference]: Start difference. First operand 376 states and 1028 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:34,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:34,702 INFO L93 Difference]: Finished difference Result 493 states and 1283 transitions. [2022-01-18 15:40:34,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:34,702 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:34,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:34,703 INFO L225 Difference]: With dead ends: 493 [2022-01-18 15:40:34,703 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:40:34,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:34,703 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 31 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:34,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 173 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 101 Unchecked, 0.1s Time] [2022-01-18 15:40:34,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:40:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 374. [2022-01-18 15:40:34,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.745308310991957) internal successors, (1024), 373 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1024 transitions. [2022-01-18 15:40:34,707 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1024 transitions. Word has length 19 [2022-01-18 15:40:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:34,707 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1024 transitions. [2022-01-18 15:40:34,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1024 transitions. [2022-01-18 15:40:34,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:34,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:34,708 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:34,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (464)] Ended with exit code 0 [2022-01-18 15:40:34,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable480,464 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:34,908 INFO L402 AbstractCegarLoop]: === Iteration 482 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 215197702, now seen corresponding path program 461 times [2022-01-18 15:40:34,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:34,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895411183] [2022-01-18 15:40:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:34,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:35,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:35,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895411183] [2022-01-18 15:40:35,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895411183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:35,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297910820] [2022-01-18 15:40:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:35,015 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:35,016 INFO L229 MonitoredProcess]: Starting monitored process 465 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:35,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Waiting until timeout for monitored process [2022-01-18 15:40:35,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:35,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:35,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:35,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:35,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:35,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:35,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:35,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:35,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:35,421 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:35,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:35,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:35,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297910820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:35,449 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:35,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:35,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550411322] [2022-01-18 15:40:35,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:35,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:35,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:35,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:35,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:35,449 INFO L87 Difference]: Start difference. First operand 374 states and 1024 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:35,596 INFO L93 Difference]: Finished difference Result 492 states and 1280 transitions. [2022-01-18 15:40:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:35,597 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:40:35,597 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:40:35,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:35,597 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 31 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:35,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 176 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 114 Unchecked, 0.1s Time] [2022-01-18 15:40:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:40:35,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 370. [2022-01-18 15:40:35,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 2.758807588075881) internal successors, (1018), 369 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1018 transitions. [2022-01-18 15:40:35,601 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1018 transitions. Word has length 19 [2022-01-18 15:40:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:35,601 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 1018 transitions. [2022-01-18 15:40:35,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1018 transitions. [2022-01-18 15:40:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:35,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:35,602 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:35,620 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (465)] Ended with exit code 0 [2022-01-18 15:40:35,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,465 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:35,802 INFO L402 AbstractCegarLoop]: === Iteration 483 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:35,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:35,803 INFO L85 PathProgramCache]: Analyzing trace with hash 231500404, now seen corresponding path program 462 times [2022-01-18 15:40:35,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:35,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852890483] [2022-01-18 15:40:35,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:35,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:35,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:35,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:35,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852890483] [2022-01-18 15:40:35,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852890483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:35,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699685889] [2022-01-18 15:40:35,904 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:35,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:35,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:35,905 INFO L229 MonitoredProcess]: Starting monitored process 466 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:35,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Waiting until timeout for monitored process [2022-01-18 15:40:35,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:35,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:35,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:35,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:36,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:36,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:36,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:36,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:36,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:36,266 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:36,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:36,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:36,289 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:36,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699685889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:36,290 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:36,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:36,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080790001] [2022-01-18 15:40:36,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:36,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:36,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:36,290 INFO L87 Difference]: Start difference. First operand 370 states and 1018 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:36,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:36,394 INFO L93 Difference]: Finished difference Result 496 states and 1297 transitions. [2022-01-18 15:40:36,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:36,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:36,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:36,395 INFO L225 Difference]: With dead ends: 496 [2022-01-18 15:40:36,396 INFO L226 Difference]: Without dead ends: 496 [2022-01-18 15:40:36,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:36,396 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:36,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 296 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-01-18 15:40:36,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-18 15:40:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 374. [2022-01-18 15:40:36,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.7560321715817695) internal successors, (1028), 373 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1028 transitions. [2022-01-18 15:40:36,400 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1028 transitions. Word has length 19 [2022-01-18 15:40:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1028 transitions. [2022-01-18 15:40:36,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:36,400 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1028 transitions. [2022-01-18 15:40:36,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:36,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:36,400 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:36,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (466)] Ended with exit code 0 [2022-01-18 15:40:36,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable482,466 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:36,601 INFO L402 AbstractCegarLoop]: === Iteration 484 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:36,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:36,601 INFO L85 PathProgramCache]: Analyzing trace with hash 403395648, now seen corresponding path program 463 times [2022-01-18 15:40:36,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:36,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717761907] [2022-01-18 15:40:36,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:36,601 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:36,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:36,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717761907] [2022-01-18 15:40:36,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717761907] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:36,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926300477] [2022-01-18 15:40:36,702 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:36,702 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:36,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:36,703 INFO L229 MonitoredProcess]: Starting monitored process 467 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:36,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Waiting until timeout for monitored process [2022-01-18 15:40:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:36,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:36,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:36,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:36,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:36,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:36,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:37,069 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:37,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:37,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:37,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926300477] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:37,092 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:37,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:37,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762748842] [2022-01-18 15:40:37,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:37,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:37,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:37,093 INFO L87 Difference]: Start difference. First operand 374 states and 1028 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:37,202 INFO L93 Difference]: Finished difference Result 511 states and 1326 transitions. [2022-01-18 15:40:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:37,203 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:37,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:37,203 INFO L225 Difference]: With dead ends: 511 [2022-01-18 15:40:37,204 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 15:40:37,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:37,204 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:37,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 197 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 325 Invalid, 0 Unknown, 203 Unchecked, 0.1s Time] [2022-01-18 15:40:37,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 15:40:37,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 371. [2022-01-18 15:40:37,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.7594594594594595) internal successors, (1021), 370 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1021 transitions. [2022-01-18 15:40:37,208 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1021 transitions. Word has length 19 [2022-01-18 15:40:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:37,208 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1021 transitions. [2022-01-18 15:40:37,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,208 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1021 transitions. [2022-01-18 15:40:37,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:37,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:37,208 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:37,224 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (467)] Ended with exit code 0 [2022-01-18 15:40:37,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,467 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:37,409 INFO L402 AbstractCegarLoop]: === Iteration 485 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 614220792, now seen corresponding path program 464 times [2022-01-18 15:40:37,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793725468] [2022-01-18 15:40:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:37,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:37,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:37,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:37,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793725468] [2022-01-18 15:40:37,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793725468] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:37,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650838144] [2022-01-18 15:40:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:37,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:37,511 INFO L229 MonitoredProcess]: Starting monitored process 468 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:37,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Waiting until timeout for monitored process [2022-01-18 15:40:37,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:37,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:37,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:37,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:37,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:37,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:37,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:37,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:37,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:37,858 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:37,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:37,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:37,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:37,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650838144] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:37,882 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:37,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:37,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980971905] [2022-01-18 15:40:37,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:37,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:37,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:37,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:37,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:37,882 INFO L87 Difference]: Start difference. First operand 371 states and 1021 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:37,942 INFO L93 Difference]: Finished difference Result 497 states and 1298 transitions. [2022-01-18 15:40:37,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:37,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:37,943 INFO L225 Difference]: With dead ends: 497 [2022-01-18 15:40:37,943 INFO L226 Difference]: Without dead ends: 497 [2022-01-18 15:40:37,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:37,943 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:37,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 159 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 111 Unchecked, 0.1s Time] [2022-01-18 15:40:37,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-18 15:40:37,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 373. [2022-01-18 15:40:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.760752688172043) internal successors, (1027), 372 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1027 transitions. [2022-01-18 15:40:37,947 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1027 transitions. Word has length 19 [2022-01-18 15:40:37,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:37,947 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1027 transitions. [2022-01-18 15:40:37,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:37,947 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1027 transitions. [2022-01-18 15:40:37,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:37,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:37,947 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:37,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (468)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2022-01-18 15:40:38,148 INFO L402 AbstractCegarLoop]: === Iteration 486 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:38,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:38,148 INFO L85 PathProgramCache]: Analyzing trace with hash 786116036, now seen corresponding path program 465 times [2022-01-18 15:40:38,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:38,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383697377] [2022-01-18 15:40:38,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:38,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:38,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383697377] [2022-01-18 15:40:38,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383697377] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037949978] [2022-01-18 15:40:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:38,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:38,258 INFO L229 MonitoredProcess]: Starting monitored process 469 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:38,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Waiting until timeout for monitored process [2022-01-18 15:40:38,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:38,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:38,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:38,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:38,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:38,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:38,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:38,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:38,637 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:38,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:38,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:38,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037949978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:38,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:38,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:38,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146329388] [2022-01-18 15:40:38,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:38,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:38,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:38,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:38,660 INFO L87 Difference]: Start difference. First operand 373 states and 1027 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:38,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:38,778 INFO L93 Difference]: Finished difference Result 513 states and 1330 transitions. [2022-01-18 15:40:38,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:38,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:38,779 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:40:38,779 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:40:38,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:38,779 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 35 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:38,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 169 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 326 Invalid, 0 Unknown, 225 Unchecked, 0.1s Time] [2022-01-18 15:40:38,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:40:38,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 371. [2022-01-18 15:40:38,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.7594594594594595) internal successors, (1021), 370 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:38,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1021 transitions. [2022-01-18 15:40:38,783 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1021 transitions. Word has length 19 [2022-01-18 15:40:38,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:38,783 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1021 transitions. [2022-01-18 15:40:38,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:38,783 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1021 transitions. [2022-01-18 15:40:38,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:38,783 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:38,783 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:38,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (469)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:38,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 469 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable485 [2022-01-18 15:40:38,984 INFO L402 AbstractCegarLoop]: === Iteration 487 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:38,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:38,984 INFO L85 PathProgramCache]: Analyzing trace with hash -939703298, now seen corresponding path program 466 times [2022-01-18 15:40:38,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779282592] [2022-01-18 15:40:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:38,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:39,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:39,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779282592] [2022-01-18 15:40:39,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779282592] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:39,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535604282] [2022-01-18 15:40:39,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:39,085 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:39,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:39,085 INFO L229 MonitoredProcess]: Starting monitored process 470 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:39,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Waiting until timeout for monitored process [2022-01-18 15:40:39,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:39,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:39,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:39,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:39,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:39,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:39,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:39,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:39,485 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:39,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:39,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:39,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535604282] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:39,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:39,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:39,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137597388] [2022-01-18 15:40:39,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:39,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:39,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:39,516 INFO L87 Difference]: Start difference. First operand 371 states and 1021 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:39,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:39,701 INFO L93 Difference]: Finished difference Result 494 states and 1286 transitions. [2022-01-18 15:40:39,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:39,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:39,702 INFO L225 Difference]: With dead ends: 494 [2022-01-18 15:40:39,702 INFO L226 Difference]: Without dead ends: 488 [2022-01-18 15:40:39,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:40:39,702 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:39,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 161 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 356 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-01-18 15:40:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-18 15:40:39,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 373. [2022-01-18 15:40:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.75) internal successors, (1023), 372 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1023 transitions. [2022-01-18 15:40:39,707 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1023 transitions. Word has length 19 [2022-01-18 15:40:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:39,707 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1023 transitions. [2022-01-18 15:40:39,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:39,707 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1023 transitions. [2022-01-18 15:40:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:39,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:39,707 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:39,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (470)] Ended with exit code 0 [2022-01-18 15:40:39,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2022-01-18 15:40:39,908 INFO L402 AbstractCegarLoop]: === Iteration 488 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:39,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1357696886, now seen corresponding path program 467 times [2022-01-18 15:40:39,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:39,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081962754] [2022-01-18 15:40:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:39,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:40,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:40,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081962754] [2022-01-18 15:40:40,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081962754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:40,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648251764] [2022-01-18 15:40:40,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:40,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:40,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:40,020 INFO L229 MonitoredProcess]: Starting monitored process 471 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:40,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Waiting until timeout for monitored process [2022-01-18 15:40:40,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:40,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:40,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:40,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:40,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:40,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:40,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:40,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:40,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:40,456 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:40,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:40,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:40,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:40,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648251764] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:40,485 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:40,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:40,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922202901] [2022-01-18 15:40:40,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:40,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:40,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:40,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:40,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:40,486 INFO L87 Difference]: Start difference. First operand 373 states and 1023 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:40,631 INFO L93 Difference]: Finished difference Result 491 states and 1279 transitions. [2022-01-18 15:40:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:40,632 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:40,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:40,633 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:40:40,633 INFO L226 Difference]: Without dead ends: 486 [2022-01-18 15:40:40,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:40,633 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:40,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 169 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 295 Invalid, 0 Unknown, 109 Unchecked, 0.1s Time] [2022-01-18 15:40:40,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-18 15:40:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 371. [2022-01-18 15:40:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.7567567567567566) internal successors, (1020), 370 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1020 transitions. [2022-01-18 15:40:40,637 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1020 transitions. Word has length 19 [2022-01-18 15:40:40,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:40,637 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1020 transitions. [2022-01-18 15:40:40,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:40,637 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1020 transitions. [2022-01-18 15:40:40,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:40,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:40,637 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:40,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (471)] Ended with exit code 0 [2022-01-18 15:40:40,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable487,471 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:40,838 INFO L402 AbstractCegarLoop]: === Iteration 489 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:40,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:40,838 INFO L85 PathProgramCache]: Analyzing trace with hash -398471740, now seen corresponding path program 468 times [2022-01-18 15:40:40,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:40,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486032754] [2022-01-18 15:40:40,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:40,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:40,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:40,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486032754] [2022-01-18 15:40:40,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486032754] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:40,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000233356] [2022-01-18 15:40:40,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:40,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:40,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:40,951 INFO L229 MonitoredProcess]: Starting monitored process 472 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:40,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Waiting until timeout for monitored process [2022-01-18 15:40:40,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:40:40,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:40,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:40,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:41,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:41,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:41,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:41,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:41,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:41,349 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:41,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:41,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:41,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000233356] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:41,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:41,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:41,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847202020] [2022-01-18 15:40:41,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:41,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:41,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:41,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:41,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:41,376 INFO L87 Difference]: Start difference. First operand 371 states and 1020 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:41,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:41,521 INFO L93 Difference]: Finished difference Result 498 states and 1298 transitions. [2022-01-18 15:40:41,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:41,522 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:41,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:41,522 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:40:41,523 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:40:41,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:41,523 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:41,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 146 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 357 Invalid, 0 Unknown, 92 Unchecked, 0.1s Time] [2022-01-18 15:40:41,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:40:41,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 372. [2022-01-18 15:40:41,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.757412398921833) internal successors, (1023), 371 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:41,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1023 transitions. [2022-01-18 15:40:41,527 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1023 transitions. Word has length 19 [2022-01-18 15:40:41,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:41,527 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1023 transitions. [2022-01-18 15:40:41,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:41,527 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1023 transitions. [2022-01-18 15:40:41,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:41,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:41,527 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:41,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (472)] Ended with exit code 0 [2022-01-18 15:40:41,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable488 [2022-01-18 15:40:41,728 INFO L402 AbstractCegarLoop]: === Iteration 490 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:41,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1960273158, now seen corresponding path program 469 times [2022-01-18 15:40:41,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:41,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553236356] [2022-01-18 15:40:41,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:41,728 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:41,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553236356] [2022-01-18 15:40:41,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553236356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381053021] [2022-01-18 15:40:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:41,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:41,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:41,837 INFO L229 MonitoredProcess]: Starting monitored process 473 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:41,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Waiting until timeout for monitored process [2022-01-18 15:40:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:41,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:41,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:42,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:42,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:42,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:42,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:42,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:42,254 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:42,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:42,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:42,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381053021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:42,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:42,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:42,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262860823] [2022-01-18 15:40:42,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:42,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:42,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:42,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:42,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:42,281 INFO L87 Difference]: Start difference. First operand 372 states and 1023 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:42,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:42,437 INFO L93 Difference]: Finished difference Result 492 states and 1283 transitions. [2022-01-18 15:40:42,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:42,437 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:42,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:42,438 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:40:42,438 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:40:42,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:42,438 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:42,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 151 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-01-18 15:40:42,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:40:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 374. [2022-01-18 15:40:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.74798927613941) internal successors, (1025), 373 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:42,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 1025 transitions. [2022-01-18 15:40:42,442 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 1025 transitions. Word has length 19 [2022-01-18 15:40:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:42,442 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 1025 transitions. [2022-01-18 15:40:42,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 1025 transitions. [2022-01-18 15:40:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:42,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:42,442 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:42,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (473)] Ended with exit code 0 [2022-01-18 15:40:42,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 473 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2022-01-18 15:40:42,643 INFO L402 AbstractCegarLoop]: === Iteration 491 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:42,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:42,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1806811940, now seen corresponding path program 470 times [2022-01-18 15:40:42,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:42,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593156259] [2022-01-18 15:40:42,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:42,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:42,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:42,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593156259] [2022-01-18 15:40:42,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593156259] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:42,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676341557] [2022-01-18 15:40:42,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:42,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:42,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:42,745 INFO L229 MonitoredProcess]: Starting monitored process 474 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:42,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Waiting until timeout for monitored process [2022-01-18 15:40:42,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:42,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:42,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:42,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:43,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:43,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:43,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:43,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:43,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:43,167 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:43,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:43,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:43,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676341557] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:43,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:43,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:43,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324822858] [2022-01-18 15:40:43,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:43,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:43,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:43,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:43,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:43,195 INFO L87 Difference]: Start difference. First operand 374 states and 1025 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:43,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:43,348 INFO L93 Difference]: Finished difference Result 491 states and 1280 transitions. [2022-01-18 15:40:43,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:40:43,349 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:43,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:43,349 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:40:43,349 INFO L226 Difference]: Without dead ends: 487 [2022-01-18 15:40:43,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:40:43,350 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:43,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 151 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 103 Unchecked, 0.1s Time] [2022-01-18 15:40:43,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-18 15:40:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 372. [2022-01-18 15:40:43,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.7547169811320753) internal successors, (1022), 371 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1022 transitions. [2022-01-18 15:40:43,354 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1022 transitions. Word has length 19 [2022-01-18 15:40:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:43,354 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1022 transitions. [2022-01-18 15:40:43,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:43,354 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1022 transitions. [2022-01-18 15:40:43,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:43,354 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:43,354 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:43,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (474)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:43,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable490,474 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:43,555 INFO L402 AbstractCegarLoop]: === Iteration 492 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:43,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:43,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1797963892, now seen corresponding path program 471 times [2022-01-18 15:40:43,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:43,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628942702] [2022-01-18 15:40:43,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:43,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:43,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628942702] [2022-01-18 15:40:43,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628942702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:43,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244333990] [2022-01-18 15:40:43,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:43,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:43,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:43,667 INFO L229 MonitoredProcess]: Starting monitored process 475 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:43,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Waiting until timeout for monitored process [2022-01-18 15:40:43,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:40:43,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:43,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:43,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:43,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:43,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:43,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:43,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:43,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:43,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:44,000 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:44,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:44,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:44,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:44,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244333990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:44,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:44,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:44,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102762229] [2022-01-18 15:40:44,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:44,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:44,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:44,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:44,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:44,024 INFO L87 Difference]: Start difference. First operand 372 states and 1022 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:44,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:44,317 INFO L93 Difference]: Finished difference Result 521 states and 1337 transitions. [2022-01-18 15:40:44,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:40:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:44,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:44,318 INFO L225 Difference]: With dead ends: 521 [2022-01-18 15:40:44,319 INFO L226 Difference]: Without dead ends: 521 [2022-01-18 15:40:44,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:44,319 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:44,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 180 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 459 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-01-18 15:40:44,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-18 15:40:44,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 373. [2022-01-18 15:40:44,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.7580645161290325) internal successors, (1026), 372 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:44,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1026 transitions. [2022-01-18 15:40:44,328 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1026 transitions. Word has length 19 [2022-01-18 15:40:44,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:44,328 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1026 transitions. [2022-01-18 15:40:44,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:44,328 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1026 transitions. [2022-01-18 15:40:44,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:44,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:44,329 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:44,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (475)] Ended with exit code 0 [2022-01-18 15:40:44,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 475 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable491 [2022-01-18 15:40:44,529 INFO L402 AbstractCegarLoop]: === Iteration 493 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:44,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:44,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1577552770, now seen corresponding path program 472 times [2022-01-18 15:40:44,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:44,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204410672] [2022-01-18 15:40:44,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:44,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:44,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204410672] [2022-01-18 15:40:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204410672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663559047] [2022-01-18 15:40:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:44,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:44,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:44,626 INFO L229 MonitoredProcess]: Starting monitored process 476 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:44,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Waiting until timeout for monitored process [2022-01-18 15:40:44,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:44,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:44,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:44,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:44,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:44,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:44,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:44,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:44,965 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:44,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:44,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:44,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:44,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663559047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:44,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:44,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:44,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941160350] [2022-01-18 15:40:44,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:44,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:44,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:44,994 INFO L87 Difference]: Start difference. First operand 373 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:45,290 INFO L93 Difference]: Finished difference Result 508 states and 1309 transitions. [2022-01-18 15:40:45,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:40:45,290 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:45,291 INFO L225 Difference]: With dead ends: 508 [2022-01-18 15:40:45,291 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:40:45,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:45,291 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 67 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:45,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 181 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 394 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-18 15:40:45,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:40:45,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 373. [2022-01-18 15:40:45,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.7553763440860215) internal successors, (1025), 372 states have internal predecessors, (1025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1025 transitions. [2022-01-18 15:40:45,295 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1025 transitions. Word has length 19 [2022-01-18 15:40:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:45,295 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1025 transitions. [2022-01-18 15:40:45,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1025 transitions. [2022-01-18 15:40:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:45,295 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:45,295 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:45,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (476)] Ended with exit code 0 [2022-01-18 15:40:45,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,476 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:45,496 INFO L402 AbstractCegarLoop]: === Iteration 494 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:45,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1211048290, now seen corresponding path program 473 times [2022-01-18 15:40:45,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:45,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220382610] [2022-01-18 15:40:45,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:45,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:45,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:45,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220382610] [2022-01-18 15:40:45,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220382610] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834997892] [2022-01-18 15:40:45,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:45,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:45,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:45,592 INFO L229 MonitoredProcess]: Starting monitored process 477 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:45,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Waiting until timeout for monitored process [2022-01-18 15:40:45,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:40:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:45,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:45,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:45,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:45,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:45,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:45,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:45,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:45,932 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:45,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:45,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:45,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:45,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834997892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:45,957 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:45,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:45,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086108538] [2022-01-18 15:40:45,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:45,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:45,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:45,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:45,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:45,957 INFO L87 Difference]: Start difference. First operand 373 states and 1025 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:46,187 INFO L93 Difference]: Finished difference Result 503 states and 1306 transitions. [2022-01-18 15:40:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:40:46,188 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:46,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:46,188 INFO L225 Difference]: With dead ends: 503 [2022-01-18 15:40:46,188 INFO L226 Difference]: Without dead ends: 501 [2022-01-18 15:40:46,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:46,189 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:46,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 177 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 394 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-01-18 15:40:46,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-01-18 15:40:46,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 373. [2022-01-18 15:40:46,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.752688172043011) internal successors, (1024), 372 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:46,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 1024 transitions. [2022-01-18 15:40:46,192 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 1024 transitions. Word has length 19 [2022-01-18 15:40:46,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:46,193 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 1024 transitions. [2022-01-18 15:40:46,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:46,193 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 1024 transitions. [2022-01-18 15:40:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:46,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:46,193 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:46,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (477)] Ended with exit code 0 [2022-01-18 15:40:46,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,477 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:46,394 INFO L402 AbstractCegarLoop]: === Iteration 495 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:46,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:46,394 INFO L85 PathProgramCache]: Analyzing trace with hash -456828294, now seen corresponding path program 474 times [2022-01-18 15:40:46,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169001054] [2022-01-18 15:40:46,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:46,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:46,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:46,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169001054] [2022-01-18 15:40:46,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169001054] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:46,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538856858] [2022-01-18 15:40:46,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:46,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:46,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:46,493 INFO L229 MonitoredProcess]: Starting monitored process 478 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:46,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Waiting until timeout for monitored process [2022-01-18 15:40:46,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:40:46,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:46,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:46,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:46,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:46,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:46,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:46,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:46,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:46,832 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:46,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:46,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:46,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538856858] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:46,861 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:46,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:46,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095401587] [2022-01-18 15:40:46,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:46,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:46,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:46,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:46,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:46,862 INFO L87 Difference]: Start difference. First operand 373 states and 1024 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:47,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:47,020 INFO L93 Difference]: Finished difference Result 491 states and 1284 transitions. [2022-01-18 15:40:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 15:40:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:47,021 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:40:47,021 INFO L226 Difference]: Without dead ends: 491 [2022-01-18 15:40:47,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:40:47,021 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 32 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:47,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 133 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 357 Invalid, 0 Unknown, 113 Unchecked, 0.1s Time] [2022-01-18 15:40:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-18 15:40:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 371. [2022-01-18 15:40:47,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.7567567567567566) internal successors, (1020), 370 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:47,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1020 transitions. [2022-01-18 15:40:47,025 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1020 transitions. Word has length 19 [2022-01-18 15:40:47,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:47,025 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1020 transitions. [2022-01-18 15:40:47,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:47,025 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1020 transitions. [2022-01-18 15:40:47,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:47,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:47,026 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:47,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (478)] Ended with exit code 0 [2022-01-18 15:40:47,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable494 [2022-01-18 15:40:47,226 INFO L402 AbstractCegarLoop]: === Iteration 496 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:47,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:47,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1991553344, now seen corresponding path program 475 times [2022-01-18 15:40:47,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:47,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597200231] [2022-01-18 15:40:47,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:47,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:47,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:47,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:47,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597200231] [2022-01-18 15:40:47,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597200231] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:47,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498005711] [2022-01-18 15:40:47,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:47,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:47,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:47,324 INFO L229 MonitoredProcess]: Starting monitored process 479 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:47,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Waiting until timeout for monitored process [2022-01-18 15:40:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:47,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:47,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:47,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:47,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:47,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:47,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:47,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:47,661 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:47,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:47,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498005711] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:47,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:47,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854558132] [2022-01-18 15:40:47,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:47,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:47,692 INFO L87 Difference]: Start difference. First operand 371 states and 1020 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:47,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:47,995 INFO L93 Difference]: Finished difference Result 609 states and 1519 transitions. [2022-01-18 15:40:47,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:40:47,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:47,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:47,996 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:40:47,996 INFO L226 Difference]: Without dead ends: 609 [2022-01-18 15:40:47,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:40:47,997 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 67 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:47,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 325 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 577 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-01-18 15:40:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-01-18 15:40:48,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 387. [2022-01-18 15:40:48,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.7538860103626943) internal successors, (1063), 386 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1063 transitions. [2022-01-18 15:40:48,001 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1063 transitions. Word has length 19 [2022-01-18 15:40:48,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:48,001 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 1063 transitions. [2022-01-18 15:40:48,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:48,001 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1063 transitions. [2022-01-18 15:40:48,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:48,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:48,002 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:48,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (479)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:48,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,479 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:48,202 INFO L402 AbstractCegarLoop]: === Iteration 497 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:48,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:48,202 INFO L85 PathProgramCache]: Analyzing trace with hash 2145014562, now seen corresponding path program 476 times [2022-01-18 15:40:48,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:48,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322126239] [2022-01-18 15:40:48,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:48,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:48,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322126239] [2022-01-18 15:40:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322126239] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:48,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038759024] [2022-01-18 15:40:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:48,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:48,296 INFO L229 MonitoredProcess]: Starting monitored process 480 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:48,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Waiting until timeout for monitored process [2022-01-18 15:40:48,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:48,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:48,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:48,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:48,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:48,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:48,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:48,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:48,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:48,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:48,630 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:48,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:48,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:48,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038759024] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:48,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:48,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:48,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026235002] [2022-01-18 15:40:48,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:48,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:48,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:48,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:48,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:48,658 INFO L87 Difference]: Start difference. First operand 387 states and 1063 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:48,957 INFO L93 Difference]: Finished difference Result 607 states and 1509 transitions. [2022-01-18 15:40:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:40:48,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:48,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:48,958 INFO L225 Difference]: With dead ends: 607 [2022-01-18 15:40:48,958 INFO L226 Difference]: Without dead ends: 607 [2022-01-18 15:40:48,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:40:48,958 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 66 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:48,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 334 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 644 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-01-18 15:40:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-01-18 15:40:48,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 385. [2022-01-18 15:40:48,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.7578125) internal successors, (1059), 384 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 1059 transitions. [2022-01-18 15:40:48,963 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 1059 transitions. Word has length 19 [2022-01-18 15:40:48,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:48,963 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 1059 transitions. [2022-01-18 15:40:48,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:48,963 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 1059 transitions. [2022-01-18 15:40:48,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:48,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:48,963 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:48,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (480)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:49,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable496,480 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:49,164 INFO L402 AbstractCegarLoop]: === Iteration 498 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:49,164 INFO L85 PathProgramCache]: Analyzing trace with hash 820349642, now seen corresponding path program 477 times [2022-01-18 15:40:49,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:49,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368100940] [2022-01-18 15:40:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:49,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:49,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:49,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368100940] [2022-01-18 15:40:49,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368100940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:49,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141088072] [2022-01-18 15:40:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:49,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:49,258 INFO L229 MonitoredProcess]: Starting monitored process 481 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:49,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Waiting until timeout for monitored process [2022-01-18 15:40:49,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:49,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:49,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:49,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:49,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:49,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:40:49,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:49,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:49,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:49,607 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:49,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:49,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:49,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141088072] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:49,638 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:49,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:49,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33786652] [2022-01-18 15:40:49,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:49,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:49,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:49,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:49,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:49,638 INFO L87 Difference]: Start difference. First operand 385 states and 1059 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:50,012 INFO L93 Difference]: Finished difference Result 565 states and 1418 transitions. [2022-01-18 15:40:50,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:40:50,012 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:50,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:50,013 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:40:50,013 INFO L226 Difference]: Without dead ends: 553 [2022-01-18 15:40:50,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:40:50,014 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 80 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:50,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 263 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 543 Invalid, 0 Unknown, 137 Unchecked, 0.2s Time] [2022-01-18 15:40:50,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-18 15:40:50,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 393. [2022-01-18 15:40:50,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.739795918367347) internal successors, (1074), 392 states have internal predecessors, (1074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:50,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1074 transitions. [2022-01-18 15:40:50,018 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1074 transitions. Word has length 19 [2022-01-18 15:40:50,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:50,018 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1074 transitions. [2022-01-18 15:40:50,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:50,018 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1074 transitions. [2022-01-18 15:40:50,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:50,019 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:50,019 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:50,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (481)] Ended with exit code 0 [2022-01-18 15:40:50,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable497 [2022-01-18 15:40:50,219 INFO L402 AbstractCegarLoop]: === Iteration 499 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1361581200, now seen corresponding path program 478 times [2022-01-18 15:40:50,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:50,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864532981] [2022-01-18 15:40:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:50,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:50,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:50,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864532981] [2022-01-18 15:40:50,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864532981] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:50,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55086066] [2022-01-18 15:40:50,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:50,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:50,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:50,320 INFO L229 MonitoredProcess]: Starting monitored process 482 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:50,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Waiting until timeout for monitored process [2022-01-18 15:40:50,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:50,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:50,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:50,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:50,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:50,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:50,664 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:50,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:50,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:50,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55086066] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:50,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:50,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:50,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083098190] [2022-01-18 15:40:50,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:50,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:50,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:50,694 INFO L87 Difference]: Start difference. First operand 393 states and 1074 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:51,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:51,084 INFO L93 Difference]: Finished difference Result 640 states and 1585 transitions. [2022-01-18 15:40:51,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:40:51,085 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:51,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:51,086 INFO L225 Difference]: With dead ends: 640 [2022-01-18 15:40:51,086 INFO L226 Difference]: Without dead ends: 630 [2022-01-18 15:40:51,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:40:51,086 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:51,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 238 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 440 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 15:40:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-18 15:40:51,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 408. [2022-01-18 15:40:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.7542997542997543) internal successors, (1121), 407 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:51,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1121 transitions. [2022-01-18 15:40:51,091 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1121 transitions. Word has length 19 [2022-01-18 15:40:51,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:51,091 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1121 transitions. [2022-01-18 15:40:51,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:51,091 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1121 transitions. [2022-01-18 15:40:51,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:51,092 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:51,092 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:51,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (482)] Ended with exit code 0 [2022-01-18 15:40:51,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2022-01-18 15:40:51,292 INFO L402 AbstractCegarLoop]: === Iteration 500 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:51,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:51,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1812661620, now seen corresponding path program 479 times [2022-01-18 15:40:51,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288736194] [2022-01-18 15:40:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:51,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:51,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:51,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:51,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:51,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288736194] [2022-01-18 15:40:51,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288736194] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:51,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099123264] [2022-01-18 15:40:51,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:51,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:51,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:51,390 INFO L229 MonitoredProcess]: Starting monitored process 483 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:51,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Waiting until timeout for monitored process [2022-01-18 15:40:51,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:40:51,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:51,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:51,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:51,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:51,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:51,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:51,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:51,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:51,706 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:51,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:51,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:51,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099123264] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:51,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:51,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:51,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384779486] [2022-01-18 15:40:51,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:51,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:51,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:51,733 INFO L87 Difference]: Start difference. First operand 408 states and 1121 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:52,169 INFO L93 Difference]: Finished difference Result 626 states and 1548 transitions. [2022-01-18 15:40:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:40:52,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:52,171 INFO L225 Difference]: With dead ends: 626 [2022-01-18 15:40:52,171 INFO L226 Difference]: Without dead ends: 623 [2022-01-18 15:40:52,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:40:52,171 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:52,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 276 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 516 Invalid, 0 Unknown, 271 Unchecked, 0.2s Time] [2022-01-18 15:40:52,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-18 15:40:52,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 409. [2022-01-18 15:40:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.730392156862745) internal successors, (1114), 408 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:52,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1114 transitions. [2022-01-18 15:40:52,176 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1114 transitions. Word has length 19 [2022-01-18 15:40:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:52,176 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1114 transitions. [2022-01-18 15:40:52,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1114 transitions. [2022-01-18 15:40:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:52,176 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:52,176 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:52,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (483)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:52,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 483 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2022-01-18 15:40:52,377 INFO L402 AbstractCegarLoop]: === Iteration 501 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:52,377 INFO L85 PathProgramCache]: Analyzing trace with hash -200220218, now seen corresponding path program 480 times [2022-01-18 15:40:52,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:52,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479105320] [2022-01-18 15:40:52,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:52,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:52,471 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:52,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479105320] [2022-01-18 15:40:52,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479105320] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:52,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422368117] [2022-01-18 15:40:52,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:52,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:52,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:52,472 INFO L229 MonitoredProcess]: Starting monitored process 484 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:52,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Waiting until timeout for monitored process [2022-01-18 15:40:52,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:40:52,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:52,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:52,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:52,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:52,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:52,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:52,828 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:52,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:52,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:52,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422368117] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:52,859 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:52,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:52,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397616163] [2022-01-18 15:40:52,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:52,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:52,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:52,859 INFO L87 Difference]: Start difference. First operand 409 states and 1114 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:53,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:53,090 INFO L93 Difference]: Finished difference Result 536 states and 1384 transitions. [2022-01-18 15:40:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:40:53,090 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:53,091 INFO L225 Difference]: With dead ends: 536 [2022-01-18 15:40:53,091 INFO L226 Difference]: Without dead ends: 530 [2022-01-18 15:40:53,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:40:53,091 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:53,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 174 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 367 Invalid, 0 Unknown, 119 Unchecked, 0.1s Time] [2022-01-18 15:40:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-18 15:40:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 413. [2022-01-18 15:40:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.7135922330097086) internal successors, (1118), 412 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1118 transitions. [2022-01-18 15:40:53,095 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1118 transitions. Word has length 19 [2022-01-18 15:40:53,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:53,095 INFO L470 AbstractCegarLoop]: Abstraction has 413 states and 1118 transitions. [2022-01-18 15:40:53,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:53,095 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1118 transitions. [2022-01-18 15:40:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:53,096 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:53,096 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:53,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (484)] Ended with exit code 0 [2022-01-18 15:40:53,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,484 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:53,296 INFO L402 AbstractCegarLoop]: === Iteration 502 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash -46759000, now seen corresponding path program 481 times [2022-01-18 15:40:53,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:53,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25767439] [2022-01-18 15:40:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:53,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:53,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:53,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25767439] [2022-01-18 15:40:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25767439] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:53,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52432308] [2022-01-18 15:40:53,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:40:53,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:53,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:53,395 INFO L229 MonitoredProcess]: Starting monitored process 485 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:53,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Waiting until timeout for monitored process [2022-01-18 15:40:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:53,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:53,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:53,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:53,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:40:53,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:53,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:40:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:53,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:53,762 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:53,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:53,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:53,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52432308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:53,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:53,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:53,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025017172] [2022-01-18 15:40:53,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:53,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:53,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:53,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:53,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:53,794 INFO L87 Difference]: Start difference. First operand 413 states and 1118 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:54,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:54,108 INFO L93 Difference]: Finished difference Result 540 states and 1383 transitions. [2022-01-18 15:40:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:40:54,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:54,109 INFO L225 Difference]: With dead ends: 540 [2022-01-18 15:40:54,109 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 15:40:54,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:40:54,109 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:54,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 181 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 502 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-18 15:40:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 15:40:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 409. [2022-01-18 15:40:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7230392156862746) internal successors, (1111), 408 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1111 transitions. [2022-01-18 15:40:54,114 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1111 transitions. Word has length 19 [2022-01-18 15:40:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:54,114 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1111 transitions. [2022-01-18 15:40:54,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1111 transitions. [2022-01-18 15:40:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:54,115 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:54,115 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:54,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (485)] Ended with exit code 0 [2022-01-18 15:40:54,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 485 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2022-01-18 15:40:54,315 INFO L402 AbstractCegarLoop]: === Iteration 503 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:54,315 INFO L85 PathProgramCache]: Analyzing trace with hash -736950464, now seen corresponding path program 482 times [2022-01-18 15:40:54,315 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:54,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333716587] [2022-01-18 15:40:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:54,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:54,404 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:54,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:54,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333716587] [2022-01-18 15:40:54,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333716587] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:54,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891881338] [2022-01-18 15:40:54,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:40:54,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:54,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:54,406 INFO L229 MonitoredProcess]: Starting monitored process 486 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:54,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Waiting until timeout for monitored process [2022-01-18 15:40:54,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:40:54,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:54,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:54,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:54,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:54,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:54,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:54,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:54,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:54,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:54,712 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:54,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:54,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:54,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891881338] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:54,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:54,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:54,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606373111] [2022-01-18 15:40:54,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:54,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:54,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:54,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:54,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:54,741 INFO L87 Difference]: Start difference. First operand 409 states and 1111 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:55,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:55,399 INFO L93 Difference]: Finished difference Result 675 states and 1649 transitions. [2022-01-18 15:40:55,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:40:55,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:55,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:55,400 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:40:55,400 INFO L226 Difference]: Without dead ends: 675 [2022-01-18 15:40:55,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:40:55,401 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:55,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 226 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 611 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-01-18 15:40:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2022-01-18 15:40:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 418. [2022-01-18 15:40:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.712230215827338) internal successors, (1131), 417 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:55,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1131 transitions. [2022-01-18 15:40:55,406 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1131 transitions. Word has length 19 [2022-01-18 15:40:55,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:55,406 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1131 transitions. [2022-01-18 15:40:55,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:55,406 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1131 transitions. [2022-01-18 15:40:55,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:55,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:55,407 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:55,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (486)] Ended with exit code 0 [2022-01-18 15:40:55,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2022-01-18 15:40:55,607 INFO L402 AbstractCegarLoop]: === Iteration 504 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:55,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:55,607 INFO L85 PathProgramCache]: Analyzing trace with hash 182500170, now seen corresponding path program 483 times [2022-01-18 15:40:55,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:55,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948551814] [2022-01-18 15:40:55,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:55,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:55,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:55,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948551814] [2022-01-18 15:40:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948551814] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:55,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675404743] [2022-01-18 15:40:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:40:55,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:55,698 INFO L229 MonitoredProcess]: Starting monitored process 487 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:55,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Waiting until timeout for monitored process [2022-01-18 15:40:55,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:40:55,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:55,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:55,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:55,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:55,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:55,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:55,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:55,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:56,005 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:56,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:56,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:56,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675404743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:56,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:56,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:56,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515073545] [2022-01-18 15:40:56,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:56,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:56,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:56,036 INFO L87 Difference]: Start difference. First operand 418 states and 1131 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:56,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:56,566 INFO L93 Difference]: Finished difference Result 596 states and 1487 transitions. [2022-01-18 15:40:56,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:40:56,566 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:56,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:56,567 INFO L225 Difference]: With dead ends: 596 [2022-01-18 15:40:56,567 INFO L226 Difference]: Without dead ends: 590 [2022-01-18 15:40:56,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:40:56,568 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 69 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:56,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 229 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 592 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:40:56,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-18 15:40:56,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 419. [2022-01-18 15:40:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.712918660287081) internal successors, (1134), 418 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:56,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1134 transitions. [2022-01-18 15:40:56,572 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1134 transitions. Word has length 19 [2022-01-18 15:40:56,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:56,572 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1134 transitions. [2022-01-18 15:40:56,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:56,572 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1134 transitions. [2022-01-18 15:40:56,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:56,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:56,573 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:56,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (487)] Ended with exit code 0 [2022-01-18 15:40:56,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 487 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable503 [2022-01-18 15:40:56,773 INFO L402 AbstractCegarLoop]: === Iteration 505 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:56,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:56,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1323866066, now seen corresponding path program 484 times [2022-01-18 15:40:56,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:56,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758061731] [2022-01-18 15:40:56,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:56,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:56,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:56,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:56,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758061731] [2022-01-18 15:40:56,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758061731] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:56,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899191244] [2022-01-18 15:40:56,861 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:40:56,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:56,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:56,862 INFO L229 MonitoredProcess]: Starting monitored process 488 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:56,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Waiting until timeout for monitored process [2022-01-18 15:40:56,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:40:56,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:57,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:57,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:57,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:57,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:57,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:57,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:57,164 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:57,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:40:57,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:40:57,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:57,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899191244] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:57,193 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:57,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:57,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419152029] [2022-01-18 15:40:57,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:57,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:57,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:57,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:57,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:57,193 INFO L87 Difference]: Start difference. First operand 419 states and 1134 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:57,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:57,876 INFO L93 Difference]: Finished difference Result 639 states and 1586 transitions. [2022-01-18 15:40:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:40:57,876 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:57,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:57,877 INFO L225 Difference]: With dead ends: 639 [2022-01-18 15:40:57,877 INFO L226 Difference]: Without dead ends: 635 [2022-01-18 15:40:57,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1445, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:40:57,878 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:57,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 213 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 642 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-01-18 15:40:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2022-01-18 15:40:57,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 419. [2022-01-18 15:40:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.710526315789474) internal successors, (1133), 418 states have internal predecessors, (1133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:57,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1133 transitions. [2022-01-18 15:40:57,883 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1133 transitions. Word has length 19 [2022-01-18 15:40:57,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:57,883 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1133 transitions. [2022-01-18 15:40:57,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:57,883 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1133 transitions. [2022-01-18 15:40:57,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:57,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:57,883 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:57,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (488)] Forceful destruction successful, exit code 0 [2022-01-18 15:40:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable504 [2022-01-18 15:40:58,084 INFO L402 AbstractCegarLoop]: === Iteration 506 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:58,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:58,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1303224646, now seen corresponding path program 485 times [2022-01-18 15:40:58,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:58,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789561300] [2022-01-18 15:40:58,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:58,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:58,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789561300] [2022-01-18 15:40:58,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789561300] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:58,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34588403] [2022-01-18 15:40:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:40:58,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:58,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:58,174 INFO L229 MonitoredProcess]: Starting monitored process 489 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Waiting until timeout for monitored process [2022-01-18 15:40:58,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:40:58,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:58,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:58,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:58,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:58,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:40:58,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:58,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:40:58,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:58,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:58,460 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:40:58,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:40:58,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:40:58,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:58,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34588403] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:58,492 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:58,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:58,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924152926] [2022-01-18 15:40:58,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:58,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:58,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:58,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:58,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:58,492 INFO L87 Difference]: Start difference. First operand 419 states and 1133 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:58,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:40:58,854 INFO L93 Difference]: Finished difference Result 562 states and 1431 transitions. [2022-01-18 15:40:58,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:40:58,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:40:58,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:40:58,855 INFO L225 Difference]: With dead ends: 562 [2022-01-18 15:40:58,856 INFO L226 Difference]: Without dead ends: 562 [2022-01-18 15:40:58,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 28 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:40:58,856 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:40:58,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 190 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 445 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-01-18 15:40:58,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2022-01-18 15:40:58,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 417. [2022-01-18 15:40:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.7091346153846154) internal successors, (1127), 416 states have internal predecessors, (1127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1127 transitions. [2022-01-18 15:40:58,860 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1127 transitions. Word has length 19 [2022-01-18 15:40:58,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:40:58,860 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1127 transitions. [2022-01-18 15:40:58,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:40:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1127 transitions. [2022-01-18 15:40:58,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:40:58,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:40:58,861 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:40:58,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (489)] Ended with exit code 0 [2022-01-18 15:40:59,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,489 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:59,061 INFO L402 AbstractCegarLoop]: === Iteration 507 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:40:59,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:40:59,062 INFO L85 PathProgramCache]: Analyzing trace with hash 32883780, now seen corresponding path program 486 times [2022-01-18 15:40:59,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:40:59,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042316888] [2022-01-18 15:40:59,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:40:59,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:40:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:40:59,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:59,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:40:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042316888] [2022-01-18 15:40:59,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042316888] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:40:59,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102197404] [2022-01-18 15:40:59,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:40:59,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:40:59,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:40:59,153 INFO L229 MonitoredProcess]: Starting monitored process 490 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:40:59,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Waiting until timeout for monitored process [2022-01-18 15:40:59,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:40:59,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:40:59,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:40:59,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:40:59,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:59,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:40:59,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:40:59,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:40:59,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:59,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:40:59,455 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:40:59,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:40:59,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:40:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:40:59,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102197404] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:40:59,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:40:59,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:40:59,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422390017] [2022-01-18 15:40:59,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:40:59,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:40:59,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:40:59,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:40:59,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:40:59,490 INFO L87 Difference]: Start difference. First operand 417 states and 1127 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:00,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:00,062 INFO L93 Difference]: Finished difference Result 851 states and 2009 transitions. [2022-01-18 15:41:00,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:00,063 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:00,064 INFO L225 Difference]: With dead ends: 851 [2022-01-18 15:41:00,064 INFO L226 Difference]: Without dead ends: 851 [2022-01-18 15:41:00,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:41:00,064 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 117 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:00,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 365 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 879 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-01-18 15:41:00,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2022-01-18 15:41:00,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 437. [2022-01-18 15:41:00,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.729357798165138) internal successors, (1190), 436 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1190 transitions. [2022-01-18 15:41:00,070 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1190 transitions. Word has length 19 [2022-01-18 15:41:00,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:00,070 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1190 transitions. [2022-01-18 15:41:00,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:00,070 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1190 transitions. [2022-01-18 15:41:00,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:00,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:00,071 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:00,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (490)] Ended with exit code 0 [2022-01-18 15:41:00,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,490 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:00,271 INFO L402 AbstractCegarLoop]: === Iteration 508 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:00,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:00,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1528917638, now seen corresponding path program 487 times [2022-01-18 15:41:00,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:00,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212494660] [2022-01-18 15:41:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:00,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:00,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:00,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212494660] [2022-01-18 15:41:00,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212494660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:00,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137001105] [2022-01-18 15:41:00,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:00,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:00,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:00,362 INFO L229 MonitoredProcess]: Starting monitored process 491 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:00,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Waiting until timeout for monitored process [2022-01-18 15:41:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:00,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:00,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:00,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:00,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:00,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:00,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:00,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:00,673 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:00,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:00,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:00,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137001105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:00,710 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:00,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:00,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247811157] [2022-01-18 15:41:00,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:00,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:00,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:00,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:00,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:00,711 INFO L87 Difference]: Start difference. First operand 437 states and 1190 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:01,214 INFO L93 Difference]: Finished difference Result 675 states and 1659 transitions. [2022-01-18 15:41:01,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:01,215 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:01,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:01,215 INFO L225 Difference]: With dead ends: 675 [2022-01-18 15:41:01,215 INFO L226 Difference]: Without dead ends: 663 [2022-01-18 15:41:01,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:41:01,216 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 93 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:01,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 283 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 641 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2022-01-18 15:41:01,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-18 15:41:01,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 437. [2022-01-18 15:41:01,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.7247706422018347) internal successors, (1188), 436 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:01,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1188 transitions. [2022-01-18 15:41:01,222 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1188 transitions. Word has length 19 [2022-01-18 15:41:01,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:01,222 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1188 transitions. [2022-01-18 15:41:01,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:01,222 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1188 transitions. [2022-01-18 15:41:01,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:01,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:01,222 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:01,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (491)] Ended with exit code 0 [2022-01-18 15:41:01,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 491 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2022-01-18 15:41:01,423 INFO L402 AbstractCegarLoop]: === Iteration 509 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:01,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:01,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2065647884, now seen corresponding path program 488 times [2022-01-18 15:41:01,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:01,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465934547] [2022-01-18 15:41:01,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:01,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:01,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465934547] [2022-01-18 15:41:01,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465934547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:01,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645016121] [2022-01-18 15:41:01,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:01,506 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:01,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:01,507 INFO L229 MonitoredProcess]: Starting monitored process 492 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:01,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Waiting until timeout for monitored process [2022-01-18 15:41:01,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:01,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:01,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:01,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:01,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:01,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:01,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:01,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:01,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:01,784 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:01,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:01,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:01,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645016121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:01,821 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:01,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:01,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970399766] [2022-01-18 15:41:01,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:01,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:01,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:01,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:01,821 INFO L87 Difference]: Start difference. First operand 437 states and 1188 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:02,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:02,593 INFO L93 Difference]: Finished difference Result 815 states and 1909 transitions. [2022-01-18 15:41:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:41:02,593 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:02,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:02,594 INFO L225 Difference]: With dead ends: 815 [2022-01-18 15:41:02,594 INFO L226 Difference]: Without dead ends: 809 [2022-01-18 15:41:02,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:41:02,594 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 159 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:02,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 333 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 801 Invalid, 0 Unknown, 104 Unchecked, 0.3s Time] [2022-01-18 15:41:02,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-01-18 15:41:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 439. [2022-01-18 15:41:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.730593607305936) internal successors, (1196), 438 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1196 transitions. [2022-01-18 15:41:02,600 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1196 transitions. Word has length 19 [2022-01-18 15:41:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:02,600 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1196 transitions. [2022-01-18 15:41:02,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1196 transitions. [2022-01-18 15:41:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:02,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:02,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:02,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (492)] Ended with exit code 0 [2022-01-18 15:41:02,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,492 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:02,801 INFO L402 AbstractCegarLoop]: === Iteration 510 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1146197250, now seen corresponding path program 489 times [2022-01-18 15:41:02,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124843343] [2022-01-18 15:41:02,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:02,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:02,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:02,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124843343] [2022-01-18 15:41:02,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124843343] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:02,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641165937] [2022-01-18 15:41:02,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:02,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:02,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:02,893 INFO L229 MonitoredProcess]: Starting monitored process 493 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:02,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Waiting until timeout for monitored process [2022-01-18 15:41:02,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:41:02,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:02,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:02,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:03,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:03,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:03,037 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:03,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:03,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:03,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:03,170 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:03,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:03,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:03,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641165937] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:03,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:03,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:03,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409042887] [2022-01-18 15:41:03,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:03,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:03,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:03,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:03,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:03,210 INFO L87 Difference]: Start difference. First operand 439 states and 1196 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:04,108 INFO L93 Difference]: Finished difference Result 818 states and 1891 transitions. [2022-01-18 15:41:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-18 15:41:04,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:04,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:04,109 INFO L225 Difference]: With dead ends: 818 [2022-01-18 15:41:04,109 INFO L226 Difference]: Without dead ends: 812 [2022-01-18 15:41:04,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 15:41:04,110 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 218 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:04,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 343 Invalid, 1047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 873 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-01-18 15:41:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2022-01-18 15:41:04,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 440. [2022-01-18 15:41:04,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.7289293849658316) internal successors, (1198), 439 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:04,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1198 transitions. [2022-01-18 15:41:04,116 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1198 transitions. Word has length 19 [2022-01-18 15:41:04,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:04,116 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1198 transitions. [2022-01-18 15:41:04,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:04,116 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1198 transitions. [2022-01-18 15:41:04,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:04,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:04,116 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:04,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (493)] Ended with exit code 0 [2022-01-18 15:41:04,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,493 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:04,317 INFO L402 AbstractCegarLoop]: === Iteration 511 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:04,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1642403810, now seen corresponding path program 490 times [2022-01-18 15:41:04,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:04,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829690728] [2022-01-18 15:41:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:04,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:04,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:04,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829690728] [2022-01-18 15:41:04,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829690728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:04,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004115044] [2022-01-18 15:41:04,401 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:04,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:04,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:04,402 INFO L229 MonitoredProcess]: Starting monitored process 494 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:04,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Waiting until timeout for monitored process [2022-01-18 15:41:04,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:04,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:04,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:04,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:04,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:04,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:04,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:04,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:04,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:04,664 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:04,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:04,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:04,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004115044] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:04,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:04,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:04,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849039213] [2022-01-18 15:41:04,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:04,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:04,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:04,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:04,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:04,697 INFO L87 Difference]: Start difference. First operand 440 states and 1198 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:05,984 INFO L93 Difference]: Finished difference Result 861 states and 2014 transitions. [2022-01-18 15:41:05,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 15:41:05,985 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:05,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:05,986 INFO L225 Difference]: With dead ends: 861 [2022-01-18 15:41:05,986 INFO L226 Difference]: Without dead ends: 857 [2022-01-18 15:41:05,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=383, Invalid=3277, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:41:05,987 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 116 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:05,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 514 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1278 Invalid, 0 Unknown, 57 Unchecked, 0.4s Time] [2022-01-18 15:41:05,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-01-18 15:41:05,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 440. [2022-01-18 15:41:05,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.724373576309795) internal successors, (1196), 439 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:05,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1196 transitions. [2022-01-18 15:41:05,992 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1196 transitions. Word has length 19 [2022-01-18 15:41:05,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:05,992 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 1196 transitions. [2022-01-18 15:41:05,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:05,993 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1196 transitions. [2022-01-18 15:41:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:05,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:05,993 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:06,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (494)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:06,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2022-01-18 15:41:06,193 INFO L402 AbstractCegarLoop]: === Iteration 512 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:06,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:06,194 INFO L85 PathProgramCache]: Analyzing trace with hash -25472774, now seen corresponding path program 491 times [2022-01-18 15:41:06,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:06,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344874035] [2022-01-18 15:41:06,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:06,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:06,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:06,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:06,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344874035] [2022-01-18 15:41:06,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344874035] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:06,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167341380] [2022-01-18 15:41:06,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:06,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:06,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:06,281 INFO L229 MonitoredProcess]: Starting monitored process 495 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:06,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Waiting until timeout for monitored process [2022-01-18 15:41:06,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:06,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:06,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:06,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:06,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:06,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:06,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:06,542 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:06,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:06,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:06,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:06,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167341380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:06,579 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:06,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:06,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528788471] [2022-01-18 15:41:06,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:06,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:06,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:06,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:06,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:06,580 INFO L87 Difference]: Start difference. First operand 440 states and 1196 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:07,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:07,061 INFO L93 Difference]: Finished difference Result 695 states and 1711 transitions. [2022-01-18 15:41:07,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:41:07,061 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:07,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:07,062 INFO L225 Difference]: With dead ends: 695 [2022-01-18 15:41:07,062 INFO L226 Difference]: Without dead ends: 695 [2022-01-18 15:41:07,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:41:07,063 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:07,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 304 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 685 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-18 15:41:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2022-01-18 15:41:07,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 436. [2022-01-18 15:41:07,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.7264367816091952) internal successors, (1186), 435 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:07,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1186 transitions. [2022-01-18 15:41:07,069 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1186 transitions. Word has length 19 [2022-01-18 15:41:07,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:07,069 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1186 transitions. [2022-01-18 15:41:07,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:07,069 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1186 transitions. [2022-01-18 15:41:07,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:07,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:07,070 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:07,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (495)] Ended with exit code 0 [2022-01-18 15:41:07,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable511 [2022-01-18 15:41:07,283 INFO L402 AbstractCegarLoop]: === Iteration 513 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:07,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:07,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1216626880, now seen corresponding path program 492 times [2022-01-18 15:41:07,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:07,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947033559] [2022-01-18 15:41:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:07,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:07,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:07,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947033559] [2022-01-18 15:41:07,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947033559] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:07,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947859159] [2022-01-18 15:41:07,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:07,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:07,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:07,371 INFO L229 MonitoredProcess]: Starting monitored process 496 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:07,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Waiting until timeout for monitored process [2022-01-18 15:41:07,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:41:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:07,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:07,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:07,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:07,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:07,560 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:07,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:07,631 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:07,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:07,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:07,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947859159] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:07,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:07,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:07,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026485066] [2022-01-18 15:41:07,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:07,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:07,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:07,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:07,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:07,668 INFO L87 Difference]: Start difference. First operand 436 states and 1186 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:08,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:08,215 INFO L93 Difference]: Finished difference Result 757 states and 1819 transitions. [2022-01-18 15:41:08,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:41:08,216 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:08,217 INFO L225 Difference]: With dead ends: 757 [2022-01-18 15:41:08,217 INFO L226 Difference]: Without dead ends: 757 [2022-01-18 15:41:08,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:41:08,217 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 101 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:08,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 379 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:41:08,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-01-18 15:41:08,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 439. [2022-01-18 15:41:08,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.732876712328767) internal successors, (1197), 438 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:08,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1197 transitions. [2022-01-18 15:41:08,223 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1197 transitions. Word has length 19 [2022-01-18 15:41:08,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:08,223 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1197 transitions. [2022-01-18 15:41:08,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:08,223 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1197 transitions. [2022-01-18 15:41:08,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:08,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:08,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:08,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (496)] Ended with exit code 0 [2022-01-18 15:41:08,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 496 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2022-01-18 15:41:08,424 INFO L402 AbstractCegarLoop]: === Iteration 514 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:08,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:08,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2136077514, now seen corresponding path program 493 times [2022-01-18 15:41:08,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:08,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263352274] [2022-01-18 15:41:08,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:08,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:08,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263352274] [2022-01-18 15:41:08,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263352274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:08,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883662005] [2022-01-18 15:41:08,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:08,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:08,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:08,512 INFO L229 MonitoredProcess]: Starting monitored process 497 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:08,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Waiting until timeout for monitored process [2022-01-18 15:41:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:08,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:08,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:08,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:08,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:08,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:08,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:08,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:08,760 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:08,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:08,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:08,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883662005] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:08,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:08,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:08,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865083616] [2022-01-18 15:41:08,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:08,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:08,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:08,795 INFO L87 Difference]: Start difference. First operand 439 states and 1197 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:09,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:09,491 INFO L93 Difference]: Finished difference Result 817 states and 1922 transitions. [2022-01-18 15:41:09,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 15:41:09,492 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:09,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:09,493 INFO L225 Difference]: With dead ends: 817 [2022-01-18 15:41:09,493 INFO L226 Difference]: Without dead ends: 811 [2022-01-18 15:41:09,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 15:41:09,493 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 125 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 1092 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1092 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:09,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 497 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1092 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 15:41:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-01-18 15:41:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 441. [2022-01-18 15:41:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.734090909090909) internal successors, (1203), 440 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1203 transitions. [2022-01-18 15:41:09,499 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1203 transitions. Word has length 19 [2022-01-18 15:41:09,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:09,499 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1203 transitions. [2022-01-18 15:41:09,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1203 transitions. [2022-01-18 15:41:09,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:09,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:09,500 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:09,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (497)] Ended with exit code 0 [2022-01-18 15:41:09,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2022-01-18 15:41:09,700 INFO L402 AbstractCegarLoop]: === Iteration 515 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 629711278, now seen corresponding path program 494 times [2022-01-18 15:41:09,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217966216] [2022-01-18 15:41:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:09,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:09,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:09,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:09,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217966216] [2022-01-18 15:41:09,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217966216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:09,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10217093] [2022-01-18 15:41:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:09,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:09,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:09,798 INFO L229 MonitoredProcess]: Starting monitored process 498 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:09,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Waiting until timeout for monitored process [2022-01-18 15:41:09,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:09,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:09,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:09,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:09,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:09,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:09,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:10,065 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:10,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:10,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:10,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10217093] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:10,102 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:10,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:10,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42491862] [2022-01-18 15:41:10,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:10,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:10,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:10,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:10,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:10,103 INFO L87 Difference]: Start difference. First operand 441 states and 1203 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:10,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:10,644 INFO L93 Difference]: Finished difference Result 742 states and 1790 transitions. [2022-01-18 15:41:10,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:41:10,645 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:10,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:10,646 INFO L225 Difference]: With dead ends: 742 [2022-01-18 15:41:10,646 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 15:41:10,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:41:10,646 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 107 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:10,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 310 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:10,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 15:41:10,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 441. [2022-01-18 15:41:10,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.731818181818182) internal successors, (1202), 440 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:10,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1202 transitions. [2022-01-18 15:41:10,651 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1202 transitions. Word has length 19 [2022-01-18 15:41:10,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:10,651 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1202 transitions. [2022-01-18 15:41:10,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:10,652 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1202 transitions. [2022-01-18 15:41:10,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:10,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:10,652 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:10,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (498)] Ended with exit code 0 [2022-01-18 15:41:10,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,498 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:10,852 INFO L402 AbstractCegarLoop]: === Iteration 516 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1038165306, now seen corresponding path program 495 times [2022-01-18 15:41:10,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:10,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542415458] [2022-01-18 15:41:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:10,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:10,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:10,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542415458] [2022-01-18 15:41:10,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542415458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:10,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693059655] [2022-01-18 15:41:10,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:10,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:10,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:10,939 INFO L229 MonitoredProcess]: Starting monitored process 499 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:10,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Waiting until timeout for monitored process [2022-01-18 15:41:10,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:41:10,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:10,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:11,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:11,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:11,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:11,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:11,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:11,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:11,176 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:11,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:11,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:11,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693059655] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:11,209 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:11,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:11,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137944672] [2022-01-18 15:41:11,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:11,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:11,210 INFO L87 Difference]: Start difference. First operand 441 states and 1202 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:11,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:11,618 INFO L93 Difference]: Finished difference Result 802 states and 1914 transitions. [2022-01-18 15:41:11,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:41:11,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:11,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:11,619 INFO L225 Difference]: With dead ends: 802 [2022-01-18 15:41:11,619 INFO L226 Difference]: Without dead ends: 802 [2022-01-18 15:41:11,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:41:11,620 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 119 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:11,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 324 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:41:11,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-01-18 15:41:11,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 441. [2022-01-18 15:41:11,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.7363636363636363) internal successors, (1204), 440 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1204 transitions. [2022-01-18 15:41:11,625 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1204 transitions. Word has length 19 [2022-01-18 15:41:11,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:11,625 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1204 transitions. [2022-01-18 15:41:11,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:11,625 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1204 transitions. [2022-01-18 15:41:11,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:11,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:11,626 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:11,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (499)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:11,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,499 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:11,826 INFO L402 AbstractCegarLoop]: === Iteration 517 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:11,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:11,827 INFO L85 PathProgramCache]: Analyzing trace with hash 94481476, now seen corresponding path program 496 times [2022-01-18 15:41:11,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:11,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662612975] [2022-01-18 15:41:11,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:11,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:11,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:11,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662612975] [2022-01-18 15:41:11,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662612975] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:11,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554954990] [2022-01-18 15:41:11,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:11,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:11,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:11,916 INFO L229 MonitoredProcess]: Starting monitored process 500 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:11,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Waiting until timeout for monitored process [2022-01-18 15:41:11,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:11,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:11,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:11,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:12,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:12,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:41:12,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:12,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:41:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:12,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:12,198 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:12,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:12,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:12,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554954990] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:12,235 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:12,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:12,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521537437] [2022-01-18 15:41:12,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:12,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:12,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:12,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:12,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:12,235 INFO L87 Difference]: Start difference. First operand 441 states and 1204 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:12,717 INFO L93 Difference]: Finished difference Result 673 states and 1663 transitions. [2022-01-18 15:41:12,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:12,717 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:12,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:12,718 INFO L225 Difference]: With dead ends: 673 [2022-01-18 15:41:12,718 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 15:41:12,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:41:12,718 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:12,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 365 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:41:12,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 15:41:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 443. [2022-01-18 15:41:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 2.728506787330317) internal successors, (1206), 442 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1206 transitions. [2022-01-18 15:41:12,724 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1206 transitions. Word has length 19 [2022-01-18 15:41:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:12,724 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1206 transitions. [2022-01-18 15:41:12,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1206 transitions. [2022-01-18 15:41:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:12,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:12,724 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:12,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (500)] Ended with exit code 0 [2022-01-18 15:41:12,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable516,500 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:12,925 INFO L402 AbstractCegarLoop]: === Iteration 518 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash 37545850, now seen corresponding path program 497 times [2022-01-18 15:41:12,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:12,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943419229] [2022-01-18 15:41:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:12,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:13,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:13,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943419229] [2022-01-18 15:41:13,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943419229] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:13,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771302908] [2022-01-18 15:41:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:13,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:13,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:13,015 INFO L229 MonitoredProcess]: Starting monitored process 501 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Waiting until timeout for monitored process [2022-01-18 15:41:13,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:41:13,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:13,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:13,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:13,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:13,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:13,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:13,263 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:13,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:13,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771302908] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:13,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:13,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-01-18 15:41:13,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524659523] [2022-01-18 15:41:13,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:13,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:13,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:13,296 INFO L87 Difference]: Start difference. First operand 443 states and 1206 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:13,714 INFO L93 Difference]: Finished difference Result 738 states and 1787 transitions. [2022-01-18 15:41:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:41:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:13,715 INFO L225 Difference]: With dead ends: 738 [2022-01-18 15:41:13,715 INFO L226 Difference]: Without dead ends: 738 [2022-01-18 15:41:13,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:41:13,716 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 95 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:13,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 332 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:41:13,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-01-18 15:41:13,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 441. [2022-01-18 15:41:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.725) internal successors, (1199), 440 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:13,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1199 transitions. [2022-01-18 15:41:13,721 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1199 transitions. Word has length 19 [2022-01-18 15:41:13,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:13,721 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1199 transitions. [2022-01-18 15:41:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1199 transitions. [2022-01-18 15:41:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:13,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:13,722 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:13,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (501)] Ended with exit code 0 [2022-01-18 15:41:13,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable517 [2022-01-18 15:41:13,922 INFO L402 AbstractCegarLoop]: === Iteration 519 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:13,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:13,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1324141014, now seen corresponding path program 498 times [2022-01-18 15:41:13,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:13,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208328167] [2022-01-18 15:41:13,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:13,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:14,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:14,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208328167] [2022-01-18 15:41:14,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208328167] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:14,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956174894] [2022-01-18 15:41:14,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:14,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:14,023 INFO L229 MonitoredProcess]: Starting monitored process 502 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:14,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Waiting until timeout for monitored process [2022-01-18 15:41:14,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:41:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:14,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:14,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:14,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:14,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:14,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:14,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:14,393 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:14,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:14,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:14,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:14,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956174894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:14,417 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:14,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:14,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599044376] [2022-01-18 15:41:14,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:14,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:14,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:14,417 INFO L87 Difference]: Start difference. First operand 441 states and 1199 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:14,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:14,566 INFO L93 Difference]: Finished difference Result 570 states and 1468 transitions. [2022-01-18 15:41:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:14,567 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:14,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:14,567 INFO L225 Difference]: With dead ends: 570 [2022-01-18 15:41:14,567 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 15:41:14,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:14,568 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:14,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 336 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 430 Invalid, 0 Unknown, 132 Unchecked, 0.1s Time] [2022-01-18 15:41:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 15:41:14,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 468. [2022-01-18 15:41:14,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.725910064239829) internal successors, (1273), 467 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1273 transitions. [2022-01-18 15:41:14,573 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1273 transitions. Word has length 19 [2022-01-18 15:41:14,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:14,573 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 1273 transitions. [2022-01-18 15:41:14,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:14,573 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1273 transitions. [2022-01-18 15:41:14,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:14,573 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:14,573 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:14,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (502)] Ended with exit code 0 [2022-01-18 15:41:14,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,502 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:14,774 INFO L402 AbstractCegarLoop]: === Iteration 520 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:14,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:14,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1496036258, now seen corresponding path program 499 times [2022-01-18 15:41:14,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:14,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121342281] [2022-01-18 15:41:14,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:14,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:14,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:14,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:14,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121342281] [2022-01-18 15:41:14,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121342281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:14,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705671181] [2022-01-18 15:41:14,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:14,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:14,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:14,875 INFO L229 MonitoredProcess]: Starting monitored process 503 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:14,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Waiting until timeout for monitored process [2022-01-18 15:41:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:15,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:15,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:15,100 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:15,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:15,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:15,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:15,245 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:15,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:15,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:15,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705671181] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:15,268 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:15,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:15,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849880578] [2022-01-18 15:41:15,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:15,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:15,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:15,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:15,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:15,268 INFO L87 Difference]: Start difference. First operand 468 states and 1273 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:15,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:15,416 INFO L93 Difference]: Finished difference Result 618 states and 1559 transitions. [2022-01-18 15:41:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:15,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:15,417 INFO L225 Difference]: With dead ends: 618 [2022-01-18 15:41:15,417 INFO L226 Difference]: Without dead ends: 618 [2022-01-18 15:41:15,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:15,417 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:15,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 323 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 417 Invalid, 0 Unknown, 188 Unchecked, 0.1s Time] [2022-01-18 15:41:15,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2022-01-18 15:41:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 462. [2022-01-18 15:41:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.7310195227765726) internal successors, (1259), 461 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 1259 transitions. [2022-01-18 15:41:15,422 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 1259 transitions. Word has length 19 [2022-01-18 15:41:15,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:15,422 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 1259 transitions. [2022-01-18 15:41:15,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:15,422 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 1259 transitions. [2022-01-18 15:41:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:15,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:15,423 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:15,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (503)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:15,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,503 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:15,623 INFO L402 AbstractCegarLoop]: === Iteration 521 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:15,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:15,623 INFO L85 PathProgramCache]: Analyzing trace with hash 906147426, now seen corresponding path program 500 times [2022-01-18 15:41:15,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:15,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381942757] [2022-01-18 15:41:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:15,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:15,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:15,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381942757] [2022-01-18 15:41:15,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381942757] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:15,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861835016] [2022-01-18 15:41:15,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:15,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:15,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:15,734 INFO L229 MonitoredProcess]: Starting monitored process 504 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:15,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Waiting until timeout for monitored process [2022-01-18 15:41:15,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:15,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:15,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:15,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:15,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:15,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:15,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:15,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:15,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:15,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:16,117 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:16,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:16,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:16,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861835016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:16,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:16,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:16,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298493963] [2022-01-18 15:41:16,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:16,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:16,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:16,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:16,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:16,141 INFO L87 Difference]: Start difference. First operand 462 states and 1259 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:16,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:16,291 INFO L93 Difference]: Finished difference Result 602 states and 1507 transitions. [2022-01-18 15:41:16,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:16,292 INFO L225 Difference]: With dead ends: 602 [2022-01-18 15:41:16,292 INFO L226 Difference]: Without dead ends: 602 [2022-01-18 15:41:16,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:16,292 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:16,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 352 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 387 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-01-18 15:41:16,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-01-18 15:41:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 458. [2022-01-18 15:41:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.737417943107221) internal successors, (1251), 457 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1251 transitions. [2022-01-18 15:41:16,297 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1251 transitions. Word has length 19 [2022-01-18 15:41:16,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:16,298 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1251 transitions. [2022-01-18 15:41:16,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:16,298 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1251 transitions. [2022-01-18 15:41:16,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:16,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:16,298 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:16,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (504)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable520,504 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:16,499 INFO L402 AbstractCegarLoop]: === Iteration 522 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:16,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash -623435380, now seen corresponding path program 501 times [2022-01-18 15:41:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849404493] [2022-01-18 15:41:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:16,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:16,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:16,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849404493] [2022-01-18 15:41:16,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849404493] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:16,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452584262] [2022-01-18 15:41:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:16,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:16,600 INFO L229 MonitoredProcess]: Starting monitored process 505 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:16,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Waiting until timeout for monitored process [2022-01-18 15:41:16,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:16,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:16,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:16,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:16,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:16,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:16,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:16,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:17,000 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:17,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:17,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:17,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:17,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452584262] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:17,029 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:17,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:17,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449848779] [2022-01-18 15:41:17,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:17,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:17,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:17,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:17,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:17,030 INFO L87 Difference]: Start difference. First operand 458 states and 1251 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:17,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:17,359 INFO L93 Difference]: Finished difference Result 565 states and 1422 transitions. [2022-01-18 15:41:17,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:17,360 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:17,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:17,361 INFO L225 Difference]: With dead ends: 565 [2022-01-18 15:41:17,361 INFO L226 Difference]: Without dead ends: 547 [2022-01-18 15:41:17,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:41:17,361 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 75 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:17,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 311 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 501 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-01-18 15:41:17,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-18 15:41:17,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 456. [2022-01-18 15:41:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.7362637362637363) internal successors, (1245), 455 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:17,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 1245 transitions. [2022-01-18 15:41:17,366 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 1245 transitions. Word has length 19 [2022-01-18 15:41:17,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:17,366 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 1245 transitions. [2022-01-18 15:41:17,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:17,366 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 1245 transitions. [2022-01-18 15:41:17,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:17,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:17,366 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:17,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (505)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:17,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2022-01-18 15:41:17,567 INFO L402 AbstractCegarLoop]: === Iteration 523 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:17,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1025126266, now seen corresponding path program 502 times [2022-01-18 15:41:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:17,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626520971] [2022-01-18 15:41:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:17,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:17,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626520971] [2022-01-18 15:41:17,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626520971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:17,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894351758] [2022-01-18 15:41:17,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:17,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:17,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:17,677 INFO L229 MonitoredProcess]: Starting monitored process 506 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:17,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Waiting until timeout for monitored process [2022-01-18 15:41:17,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:17,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:17,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:17,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:17,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:17,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:17,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:17,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:17,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:18,063 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:18,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:18,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:18,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894351758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:18,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:18,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:18,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405978154] [2022-01-18 15:41:18,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:18,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:18,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:18,088 INFO L87 Difference]: Start difference. First operand 456 states and 1245 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:18,219 INFO L93 Difference]: Finished difference Result 561 states and 1444 transitions. [2022-01-18 15:41:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:18,220 INFO L225 Difference]: With dead ends: 561 [2022-01-18 15:41:18,220 INFO L226 Difference]: Without dead ends: 561 [2022-01-18 15:41:18,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:18,221 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 57 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:18,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 269 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 345 Invalid, 0 Unknown, 215 Unchecked, 0.1s Time] [2022-01-18 15:41:18,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-01-18 15:41:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 458. [2022-01-18 15:41:18,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 2.7396061269146608) internal successors, (1252), 457 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:18,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 1252 transitions. [2022-01-18 15:41:18,225 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 1252 transitions. Word has length 19 [2022-01-18 15:41:18,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:18,225 INFO L470 AbstractCegarLoop]: Abstraction has 458 states and 1252 transitions. [2022-01-18 15:41:18,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 1252 transitions. [2022-01-18 15:41:18,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:18,226 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:18,226 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:18,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (506)] Ended with exit code 0 [2022-01-18 15:41:18,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable522 [2022-01-18 15:41:18,426 INFO L402 AbstractCegarLoop]: === Iteration 524 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:18,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:18,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2098637328, now seen corresponding path program 503 times [2022-01-18 15:41:18,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:18,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971275020] [2022-01-18 15:41:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:18,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:18,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971275020] [2022-01-18 15:41:18,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971275020] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:18,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641119543] [2022-01-18 15:41:18,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:18,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:18,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:18,530 INFO L229 MonitoredProcess]: Starting monitored process 507 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:18,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Waiting until timeout for monitored process [2022-01-18 15:41:18,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:41:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:18,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:18,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:18,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:18,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:18,937 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:18,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:18,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:18,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641119543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:18,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:18,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:18,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859869196] [2022-01-18 15:41:18,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:18,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:18,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:18,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:18,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:18,965 INFO L87 Difference]: Start difference. First operand 458 states and 1252 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:19,272 INFO L93 Difference]: Finished difference Result 558 states and 1427 transitions. [2022-01-18 15:41:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:19,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:19,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:19,273 INFO L225 Difference]: With dead ends: 558 [2022-01-18 15:41:19,273 INFO L226 Difference]: Without dead ends: 552 [2022-01-18 15:41:19,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:41:19,274 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 51 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:19,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 342 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 502 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2022-01-18 15:41:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-18 15:41:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 466. [2022-01-18 15:41:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.7268817204301077) internal successors, (1268), 465 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1268 transitions. [2022-01-18 15:41:19,279 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1268 transitions. Word has length 19 [2022-01-18 15:41:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:19,279 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1268 transitions. [2022-01-18 15:41:19,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1268 transitions. [2022-01-18 15:41:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:19,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:19,279 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:19,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (507)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:19,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2022-01-18 15:41:19,480 INFO L402 AbstractCegarLoop]: === Iteration 525 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:19,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:19,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2042868750, now seen corresponding path program 504 times [2022-01-18 15:41:19,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:19,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49690344] [2022-01-18 15:41:19,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:19,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:19,578 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:19,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49690344] [2022-01-18 15:41:19,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49690344] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:19,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174577813] [2022-01-18 15:41:19,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:19,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:19,580 INFO L229 MonitoredProcess]: Starting monitored process 508 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:19,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Waiting until timeout for monitored process [2022-01-18 15:41:19,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:41:19,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:19,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:19,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:19,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:19,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:19,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:19,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:19,997 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:19,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:19,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174577813] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:20,025 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:20,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:20,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571725451] [2022-01-18 15:41:20,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:20,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:20,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:20,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:20,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:20,026 INFO L87 Difference]: Start difference. First operand 466 states and 1268 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:20,417 INFO L93 Difference]: Finished difference Result 580 states and 1446 transitions. [2022-01-18 15:41:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:41:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:20,418 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:41:20,418 INFO L226 Difference]: Without dead ends: 572 [2022-01-18 15:41:20,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:41:20,418 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 58 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:20,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 400 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 478 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-18 15:41:20,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-18 15:41:20,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 464. [2022-01-18 15:41:20,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.7213822894168467) internal successors, (1260), 463 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1260 transitions. [2022-01-18 15:41:20,423 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1260 transitions. Word has length 19 [2022-01-18 15:41:20,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:20,423 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1260 transitions. [2022-01-18 15:41:20,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:20,423 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1260 transitions. [2022-01-18 15:41:20,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:20,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:20,424 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:20,439 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (508)] Ended with exit code 0 [2022-01-18 15:41:20,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable524,508 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:20,624 INFO L402 AbstractCegarLoop]: === Iteration 526 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:20,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:20,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1680643740, now seen corresponding path program 505 times [2022-01-18 15:41:20,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:20,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439198903] [2022-01-18 15:41:20,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:20,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:20,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:20,729 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:20,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439198903] [2022-01-18 15:41:20,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439198903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:20,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836370109] [2022-01-18 15:41:20,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:20,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:20,730 INFO L229 MonitoredProcess]: Starting monitored process 509 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:20,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Waiting until timeout for monitored process [2022-01-18 15:41:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:21,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:21,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:21,016 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:21,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:21,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:21,153 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:21,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:21,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836370109] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:21,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:21,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:21,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354944595] [2022-01-18 15:41:21,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:21,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:21,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:21,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:21,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:21,182 INFO L87 Difference]: Start difference. First operand 464 states and 1260 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:21,685 INFO L93 Difference]: Finished difference Result 590 states and 1451 transitions. [2022-01-18 15:41:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:21,685 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:21,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:21,686 INFO L225 Difference]: With dead ends: 590 [2022-01-18 15:41:21,686 INFO L226 Difference]: Without dead ends: 580 [2022-01-18 15:41:21,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=874, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:41:21,686 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 64 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:21,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 435 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 664 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:41:21,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-18 15:41:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 460. [2022-01-18 15:41:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.729847494553377) internal successors, (1253), 459 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 1253 transitions. [2022-01-18 15:41:21,691 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 1253 transitions. Word has length 19 [2022-01-18 15:41:21,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:21,691 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 1253 transitions. [2022-01-18 15:41:21,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:21,691 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 1253 transitions. [2022-01-18 15:41:21,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:21,692 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:21,692 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:21,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (509)] Ended with exit code 0 [2022-01-18 15:41:21,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable525,509 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:21,892 INFO L402 AbstractCegarLoop]: === Iteration 527 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1655098410, now seen corresponding path program 506 times [2022-01-18 15:41:21,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:21,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980223076] [2022-01-18 15:41:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:21,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:21,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980223076] [2022-01-18 15:41:21,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980223076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210149150] [2022-01-18 15:41:21,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:21,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:21,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:21,995 INFO L229 MonitoredProcess]: Starting monitored process 510 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:21,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Waiting until timeout for monitored process [2022-01-18 15:41:22,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:22,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:22,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:22,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:22,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:22,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:22,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:22,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:22,245 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:22,359 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:22,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:22,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:22,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:22,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210149150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:22,383 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:22,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:22,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458889195] [2022-01-18 15:41:22,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:22,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:22,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:22,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:22,383 INFO L87 Difference]: Start difference. First operand 460 states and 1253 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:22,986 INFO L93 Difference]: Finished difference Result 678 states and 1656 transitions. [2022-01-18 15:41:22,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:41:22,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:22,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:22,987 INFO L225 Difference]: With dead ends: 678 [2022-01-18 15:41:22,987 INFO L226 Difference]: Without dead ends: 662 [2022-01-18 15:41:22,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:41:22,988 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:22,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 256 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 527 Invalid, 0 Unknown, 305 Unchecked, 0.2s Time] [2022-01-18 15:41:22,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-01-18 15:41:22,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 433. [2022-01-18 15:41:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.7337962962962963) internal successors, (1181), 432 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1181 transitions. [2022-01-18 15:41:22,993 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1181 transitions. Word has length 19 [2022-01-18 15:41:22,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:22,993 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1181 transitions. [2022-01-18 15:41:22,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:22,993 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1181 transitions. [2022-01-18 15:41:22,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:22,993 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:22,993 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:23,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (510)] Ended with exit code 0 [2022-01-18 15:41:23,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable526,510 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:23,194 INFO L402 AbstractCegarLoop]: === Iteration 528 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:23,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1078067468, now seen corresponding path program 507 times [2022-01-18 15:41:23,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:23,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041730624] [2022-01-18 15:41:23,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:23,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:23,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041730624] [2022-01-18 15:41:23,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041730624] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:23,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028336226] [2022-01-18 15:41:23,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:23,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:23,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:23,296 INFO L229 MonitoredProcess]: Starting monitored process 511 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:23,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Waiting until timeout for monitored process [2022-01-18 15:41:23,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:23,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:23,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:23,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:23,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:23,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:23,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:23,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:23,698 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:23,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:23,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:23,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028336226] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:23,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:23,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:23,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988116036] [2022-01-18 15:41:23,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:23,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:23,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:23,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:23,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:23,725 INFO L87 Difference]: Start difference. First operand 433 states and 1181 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:23,835 INFO L93 Difference]: Finished difference Result 482 states and 1271 transitions. [2022-01-18 15:41:23,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:41:23,836 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:23,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:23,836 INFO L225 Difference]: With dead ends: 482 [2022-01-18 15:41:23,836 INFO L226 Difference]: Without dead ends: 476 [2022-01-18 15:41:23,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:41:23,836 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:23,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 146 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 91 Unchecked, 0.1s Time] [2022-01-18 15:41:23,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-01-18 15:41:23,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 435. [2022-01-18 15:41:23,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.725806451612903) internal successors, (1183), 434 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1183 transitions. [2022-01-18 15:41:23,841 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1183 transitions. Word has length 19 [2022-01-18 15:41:23,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:23,841 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1183 transitions. [2022-01-18 15:41:23,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:23,841 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1183 transitions. [2022-01-18 15:41:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:23,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:23,841 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:23,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (511)] Ended with exit code 0 [2022-01-18 15:41:24,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,511 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:24,042 INFO L402 AbstractCegarLoop]: === Iteration 529 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:24,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:24,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1231528686, now seen corresponding path program 508 times [2022-01-18 15:41:24,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:24,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690653537] [2022-01-18 15:41:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:24,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:24,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:24,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690653537] [2022-01-18 15:41:24,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690653537] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:24,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83924602] [2022-01-18 15:41:24,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:24,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:24,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:24,146 INFO L229 MonitoredProcess]: Starting monitored process 512 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:24,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Waiting until timeout for monitored process [2022-01-18 15:41:24,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:24,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:24,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:24,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:24,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:24,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:24,592 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:24,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:24,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:24,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:24,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83924602] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:24,620 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:24,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:24,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726219808] [2022-01-18 15:41:24,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:24,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:24,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:24,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:24,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:24,621 INFO L87 Difference]: Start difference. First operand 435 states and 1183 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:24,891 INFO L93 Difference]: Finished difference Result 483 states and 1268 transitions. [2022-01-18 15:41:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:41:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:24,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:24,892 INFO L225 Difference]: With dead ends: 483 [2022-01-18 15:41:24,892 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:41:24,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:41:24,892 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 30 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:24,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 155 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 404 Invalid, 0 Unknown, 200 Unchecked, 0.1s Time] [2022-01-18 15:41:24,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:41:24,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 433. [2022-01-18 15:41:24,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.7291666666666665) internal successors, (1179), 432 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:24,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1179 transitions. [2022-01-18 15:41:24,897 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1179 transitions. Word has length 19 [2022-01-18 15:41:24,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:24,897 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1179 transitions. [2022-01-18 15:41:24,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:24,897 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1179 transitions. [2022-01-18 15:41:24,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:24,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:24,897 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:24,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (512)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:25,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable528 [2022-01-18 15:41:25,098 INFO L402 AbstractCegarLoop]: === Iteration 530 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:25,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:25,098 INFO L85 PathProgramCache]: Analyzing trace with hash 541337222, now seen corresponding path program 509 times [2022-01-18 15:41:25,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270503871] [2022-01-18 15:41:25,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:25,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:25,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270503871] [2022-01-18 15:41:25,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270503871] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:25,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248476081] [2022-01-18 15:41:25,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:25,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:25,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:25,195 INFO L229 MonitoredProcess]: Starting monitored process 513 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:25,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Waiting until timeout for monitored process [2022-01-18 15:41:25,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:25,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:25,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:25,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:25,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:25,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:25,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:25,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:25,530 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:25,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:25,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:25,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:25,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248476081] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:25,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:25,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:25,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782147112] [2022-01-18 15:41:25,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:25,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:25,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:25,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:25,555 INFO L87 Difference]: Start difference. First operand 433 states and 1179 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:26,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:26,234 INFO L93 Difference]: Finished difference Result 648 states and 1572 transitions. [2022-01-18 15:41:26,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:26,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:26,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:26,235 INFO L225 Difference]: With dead ends: 648 [2022-01-18 15:41:26,235 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 15:41:26,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:41:26,235 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 82 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:26,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 237 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 576 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-01-18 15:41:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 15:41:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 436. [2022-01-18 15:41:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.7379310344827585) internal successors, (1191), 435 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:26,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1191 transitions. [2022-01-18 15:41:26,240 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1191 transitions. Word has length 19 [2022-01-18 15:41:26,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:26,240 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1191 transitions. [2022-01-18 15:41:26,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:26,240 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1191 transitions. [2022-01-18 15:41:26,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:26,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:26,241 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:26,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (513)] Ended with exit code 0 [2022-01-18 15:41:26,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable529,513 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:26,441 INFO L402 AbstractCegarLoop]: === Iteration 531 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:26,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:26,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1460787856, now seen corresponding path program 510 times [2022-01-18 15:41:26,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:26,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646649602] [2022-01-18 15:41:26,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:26,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:26,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:26,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646649602] [2022-01-18 15:41:26,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646649602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:26,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110388055] [2022-01-18 15:41:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:26,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:26,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:26,539 INFO L229 MonitoredProcess]: Starting monitored process 514 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:26,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Waiting until timeout for monitored process [2022-01-18 15:41:26,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:41:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:26,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:26,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:26,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:26,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:26,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:26,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:26,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:26,890 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:26,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:26,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110388055] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:26,917 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:26,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:26,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352756939] [2022-01-18 15:41:26,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:26,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:26,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:26,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:26,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:26,917 INFO L87 Difference]: Start difference. First operand 436 states and 1191 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:27,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:27,376 INFO L93 Difference]: Finished difference Result 522 states and 1339 transitions. [2022-01-18 15:41:27,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:41:27,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:27,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:27,377 INFO L225 Difference]: With dead ends: 522 [2022-01-18 15:41:27,377 INFO L226 Difference]: Without dead ends: 516 [2022-01-18 15:41:27,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:41:27,377 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:27,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 189 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 454 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-01-18 15:41:27,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-01-18 15:41:27,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 436. [2022-01-18 15:41:27,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.735632183908046) internal successors, (1190), 435 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:27,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1190 transitions. [2022-01-18 15:41:27,382 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1190 transitions. Word has length 19 [2022-01-18 15:41:27,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:27,382 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1190 transitions. [2022-01-18 15:41:27,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:27,382 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1190 transitions. [2022-01-18 15:41:27,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:27,382 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:27,382 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:27,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (514)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:27,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 514 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2022-01-18 15:41:27,583 INFO L402 AbstractCegarLoop]: === Iteration 532 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:27,583 INFO L85 PathProgramCache]: Analyzing trace with hash -45578380, now seen corresponding path program 511 times [2022-01-18 15:41:27,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:27,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953281523] [2022-01-18 15:41:27,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:27,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:27,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953281523] [2022-01-18 15:41:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953281523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:27,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886920145] [2022-01-18 15:41:27,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:27,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:27,689 INFO L229 MonitoredProcess]: Starting monitored process 515 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:27,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Waiting until timeout for monitored process [2022-01-18 15:41:27,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:27,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:27,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:27,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:27,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:27,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:27,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:27,920 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:27,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:28,010 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:28,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:28,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:28,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886920145] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:28,033 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:28,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:28,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204599801] [2022-01-18 15:41:28,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:28,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:28,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:28,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:28,034 INFO L87 Difference]: Start difference. First operand 436 states and 1190 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:28,481 INFO L93 Difference]: Finished difference Result 498 states and 1309 transitions. [2022-01-18 15:41:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:41:28,482 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:28,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:28,482 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:41:28,482 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:41:28,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:41:28,483 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:28,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 120 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 293 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-01-18 15:41:28,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:41:28,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 436. [2022-01-18 15:41:28,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.731034482758621) internal successors, (1188), 435 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1188 transitions. [2022-01-18 15:41:28,487 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1188 transitions. Word has length 19 [2022-01-18 15:41:28,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:28,487 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1188 transitions. [2022-01-18 15:41:28,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:28,487 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1188 transitions. [2022-01-18 15:41:28,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:28,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:28,488 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:28,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (515)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:28,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 515 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable531 [2022-01-18 15:41:28,688 INFO L402 AbstractCegarLoop]: === Iteration 533 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:28,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:28,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1713454964, now seen corresponding path program 512 times [2022-01-18 15:41:28,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:28,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833328898] [2022-01-18 15:41:28,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:28,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:28,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:28,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833328898] [2022-01-18 15:41:28,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833328898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:28,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989582121] [2022-01-18 15:41:28,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:28,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:28,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:28,792 INFO L229 MonitoredProcess]: Starting monitored process 516 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:28,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Waiting until timeout for monitored process [2022-01-18 15:41:28,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:28,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:28,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:28,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:28,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:28,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:28,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:28,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:29,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:29,132 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:29,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:29,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989582121] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:29,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910320285] [2022-01-18 15:41:29,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:29,164 INFO L87 Difference]: Start difference. First operand 436 states and 1188 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:29,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:29,442 INFO L93 Difference]: Finished difference Result 512 states and 1323 transitions. [2022-01-18 15:41:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:29,443 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:29,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:29,443 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:41:29,443 INFO L226 Difference]: Without dead ends: 510 [2022-01-18 15:41:29,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-01-18 15:41:29,444 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:29,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 191 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 398 Invalid, 0 Unknown, 64 Unchecked, 0.1s Time] [2022-01-18 15:41:29,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-01-18 15:41:29,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 433. [2022-01-18 15:41:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.736111111111111) internal successors, (1182), 432 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:29,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1182 transitions. [2022-01-18 15:41:29,448 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1182 transitions. Word has length 19 [2022-01-18 15:41:29,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:29,448 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1182 transitions. [2022-01-18 15:41:29,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:29,448 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1182 transitions. [2022-01-18 15:41:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:29,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:29,449 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:29,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (516)] Ended with exit code 0 [2022-01-18 15:41:29,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 516 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable532 [2022-01-18 15:41:29,649 INFO L402 AbstractCegarLoop]: === Iteration 534 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:29,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:29,649 INFO L85 PathProgramCache]: Analyzing trace with hash -538007034, now seen corresponding path program 513 times [2022-01-18 15:41:29,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:29,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776633102] [2022-01-18 15:41:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:29,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:29,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:29,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776633102] [2022-01-18 15:41:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776633102] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:29,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249025762] [2022-01-18 15:41:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:29,737 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:29,737 INFO L229 MonitoredProcess]: Starting monitored process 517 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:29,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Waiting until timeout for monitored process [2022-01-18 15:41:29,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:29,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:29,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:29,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:29,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:29,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:29,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:29,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:29,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:29,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:30,069 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:30,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:30,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249025762] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:30,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:30,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:30,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79882903] [2022-01-18 15:41:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:30,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:30,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:30,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:30,096 INFO L87 Difference]: Start difference. First operand 433 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:30,297 INFO L93 Difference]: Finished difference Result 532 states and 1388 transitions. [2022-01-18 15:41:30,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:41:30,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:30,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:30,297 INFO L225 Difference]: With dead ends: 532 [2022-01-18 15:41:30,297 INFO L226 Difference]: Without dead ends: 532 [2022-01-18 15:41:30,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:41:30,298 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:30,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 136 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 436 Invalid, 0 Unknown, 108 Unchecked, 0.1s Time] [2022-01-18 15:41:30,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-18 15:41:30,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 433. [2022-01-18 15:41:30,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.736111111111111) internal successors, (1182), 432 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1182 transitions. [2022-01-18 15:41:30,302 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1182 transitions. Word has length 19 [2022-01-18 15:41:30,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:30,302 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1182 transitions. [2022-01-18 15:41:30,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:30,302 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1182 transitions. [2022-01-18 15:41:30,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:30,303 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:30,303 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:30,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (517)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:30,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2022-01-18 15:41:30,511 INFO L402 AbstractCegarLoop]: === Iteration 535 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1709210736, now seen corresponding path program 514 times [2022-01-18 15:41:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454985940] [2022-01-18 15:41:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:30,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:30,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:30,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454985940] [2022-01-18 15:41:30,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454985940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:30,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149844882] [2022-01-18 15:41:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:30,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:30,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:30,598 INFO L229 MonitoredProcess]: Starting monitored process 518 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:30,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Waiting until timeout for monitored process [2022-01-18 15:41:30,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:30,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:30,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:30,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:30,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:30,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:30,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:30,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:30,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:30,952 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:30,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:30,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:30,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149844882] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:30,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:30,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:30,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054654466] [2022-01-18 15:41:30,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:30,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:30,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:30,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:30,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:30,984 INFO L87 Difference]: Start difference. First operand 433 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:31,134 INFO L93 Difference]: Finished difference Result 479 states and 1269 transitions. [2022-01-18 15:41:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:41:31,134 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:31,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:31,135 INFO L225 Difference]: With dead ends: 479 [2022-01-18 15:41:31,135 INFO L226 Difference]: Without dead ends: 473 [2022-01-18 15:41:31,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:41:31,135 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:31,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 91 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 267 Invalid, 0 Unknown, 52 Unchecked, 0.1s Time] [2022-01-18 15:41:31,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-18 15:41:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 437. [2022-01-18 15:41:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 436 states have (on average 2.7247706422018347) internal successors, (1188), 436 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 1188 transitions. [2022-01-18 15:41:31,139 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 1188 transitions. Word has length 19 [2022-01-18 15:41:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:31,140 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 1188 transitions. [2022-01-18 15:41:31,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 1188 transitions. [2022-01-18 15:41:31,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:31,140 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:31,140 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:31,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (518)] Ended with exit code 0 [2022-01-18 15:41:31,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable534,518 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:31,341 INFO L402 AbstractCegarLoop]: === Iteration 536 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:31,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:31,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1555749518, now seen corresponding path program 515 times [2022-01-18 15:41:31,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:31,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983483221] [2022-01-18 15:41:31,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:31,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983483221] [2022-01-18 15:41:31,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983483221] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:31,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082241041] [2022-01-18 15:41:31,426 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:31,427 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:31,427 INFO L229 MonitoredProcess]: Starting monitored process 519 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:31,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Waiting until timeout for monitored process [2022-01-18 15:41:31,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:41:31,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:31,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:31,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:31,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:31,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:31,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:31,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:31,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:31,822 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:31,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:31,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:31,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:31,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082241041] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:31,853 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:31,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:31,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487698140] [2022-01-18 15:41:31,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:31,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:31,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:31,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:31,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:31,854 INFO L87 Difference]: Start difference. First operand 437 states and 1188 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:32,035 INFO L93 Difference]: Finished difference Result 477 states and 1263 transitions. [2022-01-18 15:41:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:41:32,035 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:32,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:32,036 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:41:32,036 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:41:32,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:41:32,036 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:32,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 89 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 314 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-01-18 15:41:32,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:41:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 435. [2022-01-18 15:41:32,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.728110599078341) internal successors, (1184), 434 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1184 transitions. [2022-01-18 15:41:32,040 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1184 transitions. Word has length 19 [2022-01-18 15:41:32,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:32,041 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1184 transitions. [2022-01-18 15:41:32,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,041 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1184 transitions. [2022-01-18 15:41:32,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:32,041 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:32,041 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:32,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (519)] Ended with exit code 0 [2022-01-18 15:41:32,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2022-01-18 15:41:32,241 INFO L402 AbstractCegarLoop]: === Iteration 537 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:32,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:32,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2127204324, now seen corresponding path program 516 times [2022-01-18 15:41:32,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:32,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047170808] [2022-01-18 15:41:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:32,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047170808] [2022-01-18 15:41:32,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047170808] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8412383] [2022-01-18 15:41:32,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:32,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:32,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:32,337 INFO L229 MonitoredProcess]: Starting monitored process 520 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Waiting until timeout for monitored process [2022-01-18 15:41:32,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:41:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:32,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:32,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:32,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:32,755 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:32,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:32,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:32,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8412383] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:32,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:32,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:32,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986793274] [2022-01-18 15:41:32,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:32,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:32,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:32,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:32,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:32,790 INFO L87 Difference]: Start difference. First operand 435 states and 1184 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:32,927 INFO L93 Difference]: Finished difference Result 475 states and 1257 transitions. [2022-01-18 15:41:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:41:32,927 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:32,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:32,928 INFO L225 Difference]: With dead ends: 475 [2022-01-18 15:41:32,928 INFO L226 Difference]: Without dead ends: 465 [2022-01-18 15:41:32,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:41:32,928 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:32,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 86 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 279 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-01-18 15:41:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-01-18 15:41:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 433. [2022-01-18 15:41:32,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.7314814814814814) internal successors, (1180), 432 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1180 transitions. [2022-01-18 15:41:32,932 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1180 transitions. Word has length 19 [2022-01-18 15:41:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:32,932 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1180 transitions. [2022-01-18 15:41:32,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:32,932 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1180 transitions. [2022-01-18 15:41:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:32,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:32,933 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:32,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (520)] Ended with exit code 0 [2022-01-18 15:41:33,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2022-01-18 15:41:33,133 INFO L402 AbstractCegarLoop]: === Iteration 538 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:33,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1167979178, now seen corresponding path program 517 times [2022-01-18 15:41:33,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986675069] [2022-01-18 15:41:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:33,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:33,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:33,221 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986675069] [2022-01-18 15:41:33,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986675069] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:33,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153552947] [2022-01-18 15:41:33,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:33,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:33,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:33,222 INFO L229 MonitoredProcess]: Starting monitored process 521 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:33,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Waiting until timeout for monitored process [2022-01-18 15:41:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:33,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:33,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:33,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:33,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:33,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:33,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:33,560 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:33,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:33,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153552947] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:33,585 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:33,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:33,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87429635] [2022-01-18 15:41:33,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:33,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:33,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:33,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:33,586 INFO L87 Difference]: Start difference. First operand 433 states and 1180 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:33,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:33,957 INFO L93 Difference]: Finished difference Result 601 states and 1524 transitions. [2022-01-18 15:41:33,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:41:33,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:33,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:33,958 INFO L225 Difference]: With dead ends: 601 [2022-01-18 15:41:33,958 INFO L226 Difference]: Without dead ends: 601 [2022-01-18 15:41:33,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:41:33,958 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:33,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 108 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 437 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-18 15:41:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-01-18 15:41:33,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 433. [2022-01-18 15:41:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.7314814814814814) internal successors, (1180), 432 states have internal predecessors, (1180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:33,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1180 transitions. [2022-01-18 15:41:33,963 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1180 transitions. Word has length 19 [2022-01-18 15:41:33,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:33,963 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1180 transitions. [2022-01-18 15:41:33,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:33,963 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1180 transitions. [2022-01-18 15:41:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:33,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:33,963 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:33,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (521)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2022-01-18 15:41:34,164 INFO L402 AbstractCegarLoop]: === Iteration 539 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:34,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:34,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1565186700, now seen corresponding path program 518 times [2022-01-18 15:41:34,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:34,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473764998] [2022-01-18 15:41:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:34,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:34,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473764998] [2022-01-18 15:41:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473764998] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:34,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997665378] [2022-01-18 15:41:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:34,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:34,250 INFO L229 MonitoredProcess]: Starting monitored process 522 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:34,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Waiting until timeout for monitored process [2022-01-18 15:41:34,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:34,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:34,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:34,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:34,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:34,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:41:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:34,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:34,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:34,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:34,611 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:34,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:34,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:34,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:34,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997665378] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:34,641 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:34,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:34,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466722785] [2022-01-18 15:41:34,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:34,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:34,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:34,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:34,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:34,642 INFO L87 Difference]: Start difference. First operand 433 states and 1180 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:34,869 INFO L93 Difference]: Finished difference Result 478 states and 1262 transitions. [2022-01-18 15:41:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:41:34,870 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:34,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:34,870 INFO L225 Difference]: With dead ends: 478 [2022-01-18 15:41:34,870 INFO L226 Difference]: Without dead ends: 469 [2022-01-18 15:41:34,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:41:34,870 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:34,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 95 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 329 Invalid, 0 Unknown, 129 Unchecked, 0.1s Time] [2022-01-18 15:41:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2022-01-18 15:41:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 431. [2022-01-18 15:41:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.7325581395348837) internal successors, (1175), 430 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1175 transitions. [2022-01-18 15:41:34,875 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1175 transitions. Word has length 19 [2022-01-18 15:41:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:34,875 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1175 transitions. [2022-01-18 15:41:34,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1175 transitions. [2022-01-18 15:41:34,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:34,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:34,876 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:34,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (522)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:35,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable538,522 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:35,079 INFO L402 AbstractCegarLoop]: === Iteration 540 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1028456454, now seen corresponding path program 519 times [2022-01-18 15:41:35,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317697715] [2022-01-18 15:41:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:35,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:35,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:35,167 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:35,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:35,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317697715] [2022-01-18 15:41:35,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317697715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:35,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98696634] [2022-01-18 15:41:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:35,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:35,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:35,169 INFO L229 MonitoredProcess]: Starting monitored process 523 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:35,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Waiting until timeout for monitored process [2022-01-18 15:41:35,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:41:35,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:35,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:35,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:35,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:35,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:35,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:35,498 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:35,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:35,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98696634] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:35,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:35,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174077819] [2022-01-18 15:41:35,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:35,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:35,529 INFO L87 Difference]: Start difference. First operand 431 states and 1175 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:36,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:36,170 INFO L93 Difference]: Finished difference Result 667 states and 1628 transitions. [2022-01-18 15:41:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:41:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:36,171 INFO L225 Difference]: With dead ends: 667 [2022-01-18 15:41:36,171 INFO L226 Difference]: Without dead ends: 661 [2022-01-18 15:41:36,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:41:36,172 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:36,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 144 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 456 Invalid, 0 Unknown, 78 Unchecked, 0.2s Time] [2022-01-18 15:41:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-18 15:41:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 431. [2022-01-18 15:41:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.7325581395348837) internal successors, (1175), 430 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1175 transitions. [2022-01-18 15:41:36,178 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1175 transitions. Word has length 19 [2022-01-18 15:41:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:36,178 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1175 transitions. [2022-01-18 15:41:36,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1175 transitions. [2022-01-18 15:41:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:36,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:36,179 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:36,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (523)] Ended with exit code 0 [2022-01-18 15:41:36,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,523 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:36,379 INFO L402 AbstractCegarLoop]: === Iteration 541 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:36,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:36,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1947907088, now seen corresponding path program 520 times [2022-01-18 15:41:36,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:36,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828512937] [2022-01-18 15:41:36,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:36,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:36,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:36,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828512937] [2022-01-18 15:41:36,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828512937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:36,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090211451] [2022-01-18 15:41:36,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:36,477 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:36,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:36,478 INFO L229 MonitoredProcess]: Starting monitored process 524 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:36,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Waiting until timeout for monitored process [2022-01-18 15:41:36,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:36,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:36,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:36,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:36,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:36,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:36,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:36,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:36,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:36,814 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:36,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:36,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:36,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090211451] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:36,842 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:36,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:36,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095516691] [2022-01-18 15:41:36,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:36,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:36,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:36,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:36,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:36,842 INFO L87 Difference]: Start difference. First operand 431 states and 1175 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:37,383 INFO L93 Difference]: Finished difference Result 541 states and 1370 transitions. [2022-01-18 15:41:37,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:41:37,383 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:37,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:37,384 INFO L225 Difference]: With dead ends: 541 [2022-01-18 15:41:37,384 INFO L226 Difference]: Without dead ends: 535 [2022-01-18 15:41:37,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 15:41:37,384 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 84 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:37,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 155 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 506 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-01-18 15:41:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-01-18 15:41:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 433. [2022-01-18 15:41:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.736111111111111) internal successors, (1182), 432 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1182 transitions. [2022-01-18 15:41:37,388 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1182 transitions. Word has length 19 [2022-01-18 15:41:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:37,389 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1182 transitions. [2022-01-18 15:41:37,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:37,389 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1182 transitions. [2022-01-18 15:41:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:37,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:37,389 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:37,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (524)] Ended with exit code 0 [2022-01-18 15:41:37,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable540 [2022-01-18 15:41:37,590 INFO L402 AbstractCegarLoop]: === Iteration 542 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:37,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:37,590 INFO L85 PathProgramCache]: Analyzing trace with hash 441540852, now seen corresponding path program 521 times [2022-01-18 15:41:37,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:37,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955139691] [2022-01-18 15:41:37,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:37,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:37,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955139691] [2022-01-18 15:41:37,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955139691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:37,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423641798] [2022-01-18 15:41:37,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:37,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:37,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:37,671 INFO L229 MonitoredProcess]: Starting monitored process 525 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:37,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Waiting until timeout for monitored process [2022-01-18 15:41:37,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:37,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:37,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:37,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:37,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:37,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:37,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:37,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:37,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:37,996 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:37,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:37,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423641798] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:38,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:38,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:38,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905388932] [2022-01-18 15:41:38,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:38,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:38,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:38,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:38,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:38,023 INFO L87 Difference]: Start difference. First operand 433 states and 1182 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:38,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:38,331 INFO L93 Difference]: Finished difference Result 538 states and 1394 transitions. [2022-01-18 15:41:38,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:41:38,332 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:38,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:38,332 INFO L225 Difference]: With dead ends: 538 [2022-01-18 15:41:38,332 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:41:38,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:41:38,333 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:38,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 131 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 479 Invalid, 0 Unknown, 73 Unchecked, 0.2s Time] [2022-01-18 15:41:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:41:38,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 433. [2022-01-18 15:41:38,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 432 states have (on average 2.7337962962962963) internal successors, (1181), 432 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:38,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 1181 transitions. [2022-01-18 15:41:38,337 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 1181 transitions. Word has length 19 [2022-01-18 15:41:38,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:38,337 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 1181 transitions. [2022-01-18 15:41:38,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 1181 transitions. [2022-01-18 15:41:38,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:38,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:38,338 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:38,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (525)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2022-01-18 15:41:38,538 INFO L402 AbstractCegarLoop]: === Iteration 543 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1226335732, now seen corresponding path program 522 times [2022-01-18 15:41:38,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:38,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837926993] [2022-01-18 15:41:38,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:38,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:38,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:38,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837926993] [2022-01-18 15:41:38,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837926993] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:38,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882115150] [2022-01-18 15:41:38,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:38,621 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:38,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:38,622 INFO L229 MonitoredProcess]: Starting monitored process 526 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:38,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Waiting until timeout for monitored process [2022-01-18 15:41:38,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:41:38,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:38,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:38,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:38,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:38,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:38,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:38,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:38,921 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:38,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:38,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:38,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882115150] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:38,951 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:38,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:38,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399467315] [2022-01-18 15:41:38,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:38,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:38,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:38,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:38,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:38,951 INFO L87 Difference]: Start difference. First operand 433 states and 1181 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:39,278 INFO L93 Difference]: Finished difference Result 507 states and 1314 transitions. [2022-01-18 15:41:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:41:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:39,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:39,279 INFO L225 Difference]: With dead ends: 507 [2022-01-18 15:41:39,279 INFO L226 Difference]: Without dead ends: 503 [2022-01-18 15:41:39,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:41:39,279 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:39,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 117 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 386 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-01-18 15:41:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-18 15:41:39,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 429. [2022-01-18 15:41:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.7313084112149535) internal successors, (1169), 428 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1169 transitions. [2022-01-18 15:41:39,283 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1169 transitions. Word has length 19 [2022-01-18 15:41:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:39,284 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1169 transitions. [2022-01-18 15:41:39,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:39,284 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1169 transitions. [2022-01-18 15:41:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:39,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:39,284 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:39,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (526)] Ended with exit code 0 [2022-01-18 15:41:39,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2022-01-18 15:41:39,485 INFO L402 AbstractCegarLoop]: === Iteration 544 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:39,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:39,485 INFO L85 PathProgramCache]: Analyzing trace with hash -736623658, now seen corresponding path program 523 times [2022-01-18 15:41:39,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:39,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435648581] [2022-01-18 15:41:39,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:39,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:39,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435648581] [2022-01-18 15:41:39,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435648581] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:39,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281221053] [2022-01-18 15:41:39,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:39,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:39,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:39,573 INFO L229 MonitoredProcess]: Starting monitored process 527 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:39,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Waiting until timeout for monitored process [2022-01-18 15:41:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:39,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:39,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:39,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:39,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:39,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:39,885 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:39,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:39,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:39,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281221053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:39,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:39,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:39,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538659012] [2022-01-18 15:41:39,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:39,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:39,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:39,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:39,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:39,914 INFO L87 Difference]: Start difference. First operand 429 states and 1169 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:40,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:40,201 INFO L93 Difference]: Finished difference Result 592 states and 1496 transitions. [2022-01-18 15:41:40,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:41:40,202 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:40,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:40,202 INFO L225 Difference]: With dead ends: 592 [2022-01-18 15:41:40,202 INFO L226 Difference]: Without dead ends: 592 [2022-01-18 15:41:40,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:41:40,203 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 58 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:40,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 197 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 521 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2022-01-18 15:41:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-18 15:41:40,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 431. [2022-01-18 15:41:40,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.7372093023255815) internal successors, (1177), 430 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:40,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1177 transitions. [2022-01-18 15:41:40,208 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1177 transitions. Word has length 19 [2022-01-18 15:41:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:40,208 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1177 transitions. [2022-01-18 15:41:40,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1177 transitions. [2022-01-18 15:41:40,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:40,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:40,208 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:40,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (527)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:40,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2022-01-18 15:41:40,409 INFO L402 AbstractCegarLoop]: === Iteration 545 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:40,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:40,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1996542220, now seen corresponding path program 524 times [2022-01-18 15:41:40,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:40,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603709043] [2022-01-18 15:41:40,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:40,409 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603709043] [2022-01-18 15:41:40,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603709043] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:40,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83063167] [2022-01-18 15:41:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:40,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:40,499 INFO L229 MonitoredProcess]: Starting monitored process 528 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:40,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Waiting until timeout for monitored process [2022-01-18 15:41:40,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:40,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:40,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:40,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:40,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:40,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:40,824 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:40,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:40,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:40,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83063167] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:40,858 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:40,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:40,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24130995] [2022-01-18 15:41:40,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:40,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:40,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:40,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:40,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:40,858 INFO L87 Difference]: Start difference. First operand 431 states and 1177 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:41,211 INFO L93 Difference]: Finished difference Result 526 states and 1342 transitions. [2022-01-18 15:41:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:41:41,212 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:41,213 INFO L225 Difference]: With dead ends: 526 [2022-01-18 15:41:41,213 INFO L226 Difference]: Without dead ends: 520 [2022-01-18 15:41:41,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:41:41,213 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 50 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:41,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 292 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 493 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-18 15:41:41,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-18 15:41:41,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 435. [2022-01-18 15:41:41,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.725806451612903) internal successors, (1183), 434 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1183 transitions. [2022-01-18 15:41:41,217 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1183 transitions. Word has length 19 [2022-01-18 15:41:41,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:41,218 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1183 transitions. [2022-01-18 15:41:41,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1183 transitions. [2022-01-18 15:41:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:41,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:41,218 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:41,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (528)] Ended with exit code 0 [2022-01-18 15:41:41,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,528 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:41,419 INFO L402 AbstractCegarLoop]: === Iteration 546 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:41,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash -2144963858, now seen corresponding path program 525 times [2022-01-18 15:41:41,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:41,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197321778] [2022-01-18 15:41:41,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:41,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197321778] [2022-01-18 15:41:41,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197321778] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:41,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815962225] [2022-01-18 15:41:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:41,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:41,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:41,517 INFO L229 MonitoredProcess]: Starting monitored process 529 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:41,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Waiting until timeout for monitored process [2022-01-18 15:41:41,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:41,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:41,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:41,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:41,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:41:41,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:41,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:41:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:41,910 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:41,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:41,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:41,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815962225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:41,947 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:41,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:41,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110898542] [2022-01-18 15:41:41,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:41,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:41,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:41,948 INFO L87 Difference]: Start difference. First operand 435 states and 1183 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:42,354 INFO L93 Difference]: Finished difference Result 516 states and 1323 transitions. [2022-01-18 15:41:42,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:42,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:42,355 INFO L225 Difference]: With dead ends: 516 [2022-01-18 15:41:42,355 INFO L226 Difference]: Without dead ends: 508 [2022-01-18 15:41:42,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:41:42,356 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 70 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:42,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 192 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 439 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-01-18 15:41:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-01-18 15:41:42,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 431. [2022-01-18 15:41:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.727906976744186) internal successors, (1173), 430 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1173 transitions. [2022-01-18 15:41:42,360 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1173 transitions. Word has length 19 [2022-01-18 15:41:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:42,360 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1173 transitions. [2022-01-18 15:41:42,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1173 transitions. [2022-01-18 15:41:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:42,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:42,361 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:42,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (529)] Ended with exit code 0 [2022-01-18 15:41:42,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2022-01-18 15:41:42,561 INFO L402 AbstractCegarLoop]: === Iteration 547 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:42,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:42,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1459811974, now seen corresponding path program 526 times [2022-01-18 15:41:42,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:42,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932104995] [2022-01-18 15:41:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:42,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:42,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932104995] [2022-01-18 15:41:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932104995] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:42,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690959461] [2022-01-18 15:41:42,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:42,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:42,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:42,651 INFO L229 MonitoredProcess]: Starting monitored process 530 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:42,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Waiting until timeout for monitored process [2022-01-18 15:41:42,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:42,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:42,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:42,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:42,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:42,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:42,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:42,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:42,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:42,959 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:42,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:42,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:42,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690959461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:42,991 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:42,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:42,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679176762] [2022-01-18 15:41:42,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:42,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:42,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:42,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:42,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:42,991 INFO L87 Difference]: Start difference. First operand 431 states and 1173 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:43,475 INFO L93 Difference]: Finished difference Result 666 states and 1591 transitions. [2022-01-18 15:41:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:43,475 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:43,476 INFO L225 Difference]: With dead ends: 666 [2022-01-18 15:41:43,476 INFO L226 Difference]: Without dead ends: 660 [2022-01-18 15:41:43,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:41:43,477 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 135 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:43,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 214 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 641 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-01-18 15:41:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-01-18 15:41:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 428. [2022-01-18 15:41:43,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.718969555035129) internal successors, (1161), 427 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 1161 transitions. [2022-01-18 15:41:43,482 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 1161 transitions. Word has length 19 [2022-01-18 15:41:43,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:43,482 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 1161 transitions. [2022-01-18 15:41:43,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:43,482 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 1161 transitions. [2022-01-18 15:41:43,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:43,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:43,482 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:43,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (530)] Ended with exit code 0 [2022-01-18 15:41:43,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 530 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2022-01-18 15:41:43,683 INFO L402 AbstractCegarLoop]: === Iteration 548 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:43,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:43,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1915704688, now seen corresponding path program 527 times [2022-01-18 15:41:43,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:43,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894630802] [2022-01-18 15:41:43,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:43,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:43,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:43,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894630802] [2022-01-18 15:41:43,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894630802] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:43,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516945225] [2022-01-18 15:41:43,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:43,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:43,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:43,791 INFO L229 MonitoredProcess]: Starting monitored process 531 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:43,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Waiting until timeout for monitored process [2022-01-18 15:41:43,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:43,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:43,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:43,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:43,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:43,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:43,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:43,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:44,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:44,074 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:44,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:44,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:44,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516945225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:44,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:44,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:44,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356135211] [2022-01-18 15:41:44,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:44,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:44,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:44,109 INFO L87 Difference]: Start difference. First operand 428 states and 1161 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:45,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:45,021 INFO L93 Difference]: Finished difference Result 661 states and 1561 transitions. [2022-01-18 15:41:45,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 15:41:45,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:45,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:45,022 INFO L225 Difference]: With dead ends: 661 [2022-01-18 15:41:45,022 INFO L226 Difference]: Without dead ends: 655 [2022-01-18 15:41:45,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:41:45,022 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 223 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:45,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 243 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 785 Invalid, 0 Unknown, 127 Unchecked, 0.3s Time] [2022-01-18 15:41:45,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-01-18 15:41:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 431. [2022-01-18 15:41:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.7232558139534886) internal successors, (1171), 430 states have internal predecessors, (1171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:45,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1171 transitions. [2022-01-18 15:41:45,027 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1171 transitions. Word has length 19 [2022-01-18 15:41:45,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:45,027 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1171 transitions. [2022-01-18 15:41:45,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:45,027 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1171 transitions. [2022-01-18 15:41:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:45,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:45,028 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:45,042 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (531)] Ended with exit code 0 [2022-01-18 15:41:45,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2022-01-18 15:41:45,228 INFO L402 AbstractCegarLoop]: === Iteration 549 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:45,228 INFO L85 PathProgramCache]: Analyzing trace with hash 872896372, now seen corresponding path program 528 times [2022-01-18 15:41:45,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:45,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520745783] [2022-01-18 15:41:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:45,228 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:45,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520745783] [2022-01-18 15:41:45,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520745783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:45,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177384018] [2022-01-18 15:41:45,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:45,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:45,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:45,308 INFO L229 MonitoredProcess]: Starting monitored process 532 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:45,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Waiting until timeout for monitored process [2022-01-18 15:41:45,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-18 15:41:45,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:45,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:45,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:45,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:45,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:45,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:45,576 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:45,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:45,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:45,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177384018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:45,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:45,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:45,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158600438] [2022-01-18 15:41:45,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:45,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:45,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:45,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:45,605 INFO L87 Difference]: Start difference. First operand 431 states and 1171 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:46,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:46,220 INFO L93 Difference]: Finished difference Result 623 states and 1519 transitions. [2022-01-18 15:41:46,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:41:46,220 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:46,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:46,221 INFO L225 Difference]: With dead ends: 623 [2022-01-18 15:41:46,221 INFO L226 Difference]: Without dead ends: 619 [2022-01-18 15:41:46,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:41:46,221 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 102 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:46,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 219 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 602 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-01-18 15:41:46,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-18 15:41:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 431. [2022-01-18 15:41:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.718604651162791) internal successors, (1169), 430 states have internal predecessors, (1169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:46,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1169 transitions. [2022-01-18 15:41:46,226 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1169 transitions. Word has length 19 [2022-01-18 15:41:46,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:46,226 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1169 transitions. [2022-01-18 15:41:46,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:46,226 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1169 transitions. [2022-01-18 15:41:46,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:46,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:46,227 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:46,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (532)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:46,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,532 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:46,427 INFO L402 AbstractCegarLoop]: === Iteration 550 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:46,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash -794980212, now seen corresponding path program 529 times [2022-01-18 15:41:46,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:46,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960331507] [2022-01-18 15:41:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:46,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:46,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:46,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960331507] [2022-01-18 15:41:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960331507] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:46,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557299419] [2022-01-18 15:41:46,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:46,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:46,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:46,508 INFO L229 MonitoredProcess]: Starting monitored process 533 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:46,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Waiting until timeout for monitored process [2022-01-18 15:41:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:46,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:46,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:46,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:46,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:46,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:46,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:46,768 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:46,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:46,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:46,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557299419] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:46,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:46,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:46,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460242165] [2022-01-18 15:41:46,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:46,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:46,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:46,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:46,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:46,804 INFO L87 Difference]: Start difference. First operand 431 states and 1169 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:47,275 INFO L93 Difference]: Finished difference Result 548 states and 1388 transitions. [2022-01-18 15:41:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:41:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:47,276 INFO L225 Difference]: With dead ends: 548 [2022-01-18 15:41:47,276 INFO L226 Difference]: Without dead ends: 548 [2022-01-18 15:41:47,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:41:47,276 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:47,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 207 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 601 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-01-18 15:41:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2022-01-18 15:41:47,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 425. [2022-01-18 15:41:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.714622641509434) internal successors, (1151), 424 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1151 transitions. [2022-01-18 15:41:47,281 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1151 transitions. Word has length 19 [2022-01-18 15:41:47,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:47,281 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 1151 transitions. [2022-01-18 15:41:47,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:47,281 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1151 transitions. [2022-01-18 15:41:47,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:47,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:47,281 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:47,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (533)] Ended with exit code 0 [2022-01-18 15:41:47,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2022-01-18 15:41:47,482 INFO L402 AbstractCegarLoop]: === Iteration 551 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:47,482 INFO L85 PathProgramCache]: Analyzing trace with hash 431658646, now seen corresponding path program 530 times [2022-01-18 15:41:47,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:47,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013987705] [2022-01-18 15:41:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:47,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:47,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013987705] [2022-01-18 15:41:47,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013987705] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:47,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957101783] [2022-01-18 15:41:47,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:47,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:47,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:47,562 INFO L229 MonitoredProcess]: Starting monitored process 534 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:47,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Waiting until timeout for monitored process [2022-01-18 15:41:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:47,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:47,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:47,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:47,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:47,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:47,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:47,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:47,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:47,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:47,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:47,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957101783] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:47,845 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:47,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:47,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038604545] [2022-01-18 15:41:47,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:47,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:47,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:47,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:47,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:47,846 INFO L87 Difference]: Start difference. First operand 425 states and 1151 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:48,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:48,360 INFO L93 Difference]: Finished difference Result 577 states and 1424 transitions. [2022-01-18 15:41:48,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:41:48,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:48,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:48,361 INFO L225 Difference]: With dead ends: 577 [2022-01-18 15:41:48,361 INFO L226 Difference]: Without dead ends: 577 [2022-01-18 15:41:48,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:41:48,362 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 147 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:48,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 190 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:48,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-01-18 15:41:48,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 421. [2022-01-18 15:41:48,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.7071428571428573) internal successors, (1137), 420 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:48,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1137 transitions. [2022-01-18 15:41:48,366 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1137 transitions. Word has length 19 [2022-01-18 15:41:48,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:48,366 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 1137 transitions. [2022-01-18 15:41:48,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:48,366 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1137 transitions. [2022-01-18 15:41:48,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:48,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:48,367 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:48,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (534)] Ended with exit code 0 [2022-01-18 15:41:48,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,534 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:48,567 INFO L402 AbstractCegarLoop]: === Iteration 552 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1366570076, now seen corresponding path program 531 times [2022-01-18 15:41:48,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:48,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544006517] [2022-01-18 15:41:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:48,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:48,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:48,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:48,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544006517] [2022-01-18 15:41:48,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544006517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:48,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933730520] [2022-01-18 15:41:48,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:48,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:48,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:48,648 INFO L229 MonitoredProcess]: Starting monitored process 535 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:48,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Waiting until timeout for monitored process [2022-01-18 15:41:48,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:48,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:48,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:48,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:48,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:48,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:48,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:48,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:48,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:48,904 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:48,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:48,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933730520] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:48,933 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:48,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:48,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283189329] [2022-01-18 15:41:48,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:48,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:48,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:48,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:48,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:48,934 INFO L87 Difference]: Start difference. First operand 421 states and 1137 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:50,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:50,064 INFO L93 Difference]: Finished difference Result 722 states and 1678 transitions. [2022-01-18 15:41:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 15:41:50,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:50,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:50,065 INFO L225 Difference]: With dead ends: 722 [2022-01-18 15:41:50,065 INFO L226 Difference]: Without dead ends: 716 [2022-01-18 15:41:50,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=454, Invalid=3206, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 15:41:50,065 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 203 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 813 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:50,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 216 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 813 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:41:50,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-01-18 15:41:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 424. [2022-01-18 15:41:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.7092198581560285) internal successors, (1146), 423 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:50,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1146 transitions. [2022-01-18 15:41:50,070 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1146 transitions. Word has length 19 [2022-01-18 15:41:50,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:50,070 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1146 transitions. [2022-01-18 15:41:50,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:50,070 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1146 transitions. [2022-01-18 15:41:50,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:50,071 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:50,071 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:50,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (535)] Ended with exit code 0 [2022-01-18 15:41:50,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2022-01-18 15:41:50,271 INFO L402 AbstractCegarLoop]: === Iteration 553 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:50,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:50,272 INFO L85 PathProgramCache]: Analyzing trace with hash -139796160, now seen corresponding path program 532 times [2022-01-18 15:41:50,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:50,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826209271] [2022-01-18 15:41:50,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:50,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:50,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826209271] [2022-01-18 15:41:50,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826209271] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:50,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216046647] [2022-01-18 15:41:50,355 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:50,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:50,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:50,356 INFO L229 MonitoredProcess]: Starting monitored process 536 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:50,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Waiting until timeout for monitored process [2022-01-18 15:41:50,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:50,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:50,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:50,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:50,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:50,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:50,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:50,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:50,625 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:50,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:50,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:50,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216046647] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:50,659 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:50,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:50,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342335246] [2022-01-18 15:41:50,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:50,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:50,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:50,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:50,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:50,659 INFO L87 Difference]: Start difference. First operand 424 states and 1146 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:51,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:51,339 INFO L93 Difference]: Finished difference Result 561 states and 1382 transitions. [2022-01-18 15:41:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:41:51,340 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:51,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:51,341 INFO L225 Difference]: With dead ends: 561 [2022-01-18 15:41:51,341 INFO L226 Difference]: Without dead ends: 557 [2022-01-18 15:41:51,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:41:51,341 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 117 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:51,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 222 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:51,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-18 15:41:51,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 424. [2022-01-18 15:41:51,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.7044917257683214) internal successors, (1144), 423 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1144 transitions. [2022-01-18 15:41:51,346 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1144 transitions. Word has length 19 [2022-01-18 15:41:51,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:51,346 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1144 transitions. [2022-01-18 15:41:51,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1144 transitions. [2022-01-18 15:41:51,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:51,347 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:51,347 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:51,362 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (536)] Ended with exit code 0 [2022-01-18 15:41:51,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable552,536 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:51,547 INFO L402 AbstractCegarLoop]: === Iteration 554 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:51,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:51,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1807672744, now seen corresponding path program 533 times [2022-01-18 15:41:51,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:51,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744268494] [2022-01-18 15:41:51,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:51,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:51,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:51,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744268494] [2022-01-18 15:41:51,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744268494] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:51,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418444160] [2022-01-18 15:41:51,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:51,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:51,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:51,628 INFO L229 MonitoredProcess]: Starting monitored process 537 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:51,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Waiting until timeout for monitored process [2022-01-18 15:41:51,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:51,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:51,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:51,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:51,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:51,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:51,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:51,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:51,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:51,866 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:51,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:51,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:51,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418444160] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:51,896 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:51,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:51,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80441281] [2022-01-18 15:41:51,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:51,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:51,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:51,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:51,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:51,897 INFO L87 Difference]: Start difference. First operand 424 states and 1144 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:52,526 INFO L93 Difference]: Finished difference Result 648 states and 1571 transitions. [2022-01-18 15:41:52,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:41:52,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:52,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:52,527 INFO L225 Difference]: With dead ends: 648 [2022-01-18 15:41:52,527 INFO L226 Difference]: Without dead ends: 648 [2022-01-18 15:41:52,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:41:52,527 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 95 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:52,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 161 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:52,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-18 15:41:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 417. [2022-01-18 15:41:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.699519230769231) internal successors, (1123), 416 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1123 transitions. [2022-01-18 15:41:52,532 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1123 transitions. Word has length 19 [2022-01-18 15:41:52,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:52,532 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1123 transitions. [2022-01-18 15:41:52,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1123 transitions. [2022-01-18 15:41:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:52,533 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:52,533 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:52,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (537)] Ended with exit code 0 [2022-01-18 15:41:52,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable553 [2022-01-18 15:41:52,733 INFO L402 AbstractCegarLoop]: === Iteration 555 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:52,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -675025962, now seen corresponding path program 534 times [2022-01-18 15:41:52,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:52,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050501683] [2022-01-18 15:41:52,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:52,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:52,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:52,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:52,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050501683] [2022-01-18 15:41:52,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050501683] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:52,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071246868] [2022-01-18 15:41:52,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:52,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:52,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:52,818 INFO L229 MonitoredProcess]: Starting monitored process 538 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:52,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Waiting until timeout for monitored process [2022-01-18 15:41:52,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:41:52,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:52,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:52,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:52,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:52,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:41:53,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:53,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:41:53,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:53,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:53,098 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:53,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:41:53,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:53,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071246868] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:53,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:53,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:53,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286417101] [2022-01-18 15:41:53,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:53,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:53,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:53,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:53,130 INFO L87 Difference]: Start difference. First operand 417 states and 1123 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:53,481 INFO L93 Difference]: Finished difference Result 461 states and 1208 transitions. [2022-01-18 15:41:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:41:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:53,482 INFO L225 Difference]: With dead ends: 461 [2022-01-18 15:41:53,482 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:41:53,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:41:53,482 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:53,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 89 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:53,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:41:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 417. [2022-01-18 15:41:53,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.6947115384615383) internal successors, (1121), 416 states have internal predecessors, (1121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1121 transitions. [2022-01-18 15:41:53,486 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1121 transitions. Word has length 19 [2022-01-18 15:41:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:53,486 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1121 transitions. [2022-01-18 15:41:53,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1121 transitions. [2022-01-18 15:41:53,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:53,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:53,487 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:53,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (538)] Forceful destruction successful, exit code 0 [2022-01-18 15:41:53,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2022-01-18 15:41:53,687 INFO L402 AbstractCegarLoop]: === Iteration 556 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -731961588, now seen corresponding path program 535 times [2022-01-18 15:41:53,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:53,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477189649] [2022-01-18 15:41:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:53,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:53,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477189649] [2022-01-18 15:41:53,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477189649] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:53,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95603037] [2022-01-18 15:41:53,770 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:41:53,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:53,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:53,771 INFO L229 MonitoredProcess]: Starting monitored process 539 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:53,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Waiting until timeout for monitored process [2022-01-18 15:41:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:53,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:53,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:41:53,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:53,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:41:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:53,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:54,020 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:41:54,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:41:54,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:41:54,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:41:54,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95603037] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:54,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:54,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 17 [2022-01-18 15:41:54,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497819783] [2022-01-18 15:41:54,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:54,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:41:54,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:54,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:41:54,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:41:54,065 INFO L87 Difference]: Start difference. First operand 417 states and 1121 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:54,411 INFO L93 Difference]: Finished difference Result 537 states and 1363 transitions. [2022-01-18 15:41:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:41:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:54,412 INFO L225 Difference]: With dead ends: 537 [2022-01-18 15:41:54,412 INFO L226 Difference]: Without dead ends: 537 [2022-01-18 15:41:54,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:41:54,413 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:54,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 95 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:54,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-18 15:41:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 411. [2022-01-18 15:41:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.6902439024390246) internal successors, (1103), 410 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:54,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1103 transitions. [2022-01-18 15:41:54,417 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1103 transitions. Word has length 19 [2022-01-18 15:41:54,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:54,417 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 1103 transitions. [2022-01-18 15:41:54,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:54,417 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1103 transitions. [2022-01-18 15:41:54,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:54,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:54,418 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:54,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (539)] Ended with exit code 0 [2022-01-18 15:41:54,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable555 [2022-01-18 15:41:54,618 INFO L402 AbstractCegarLoop]: === Iteration 557 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -881577978, now seen corresponding path program 536 times [2022-01-18 15:41:54,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:54,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851654855] [2022-01-18 15:41:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:54,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:54,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:54,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:54,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851654855] [2022-01-18 15:41:54,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851654855] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:54,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031561696] [2022-01-18 15:41:54,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:41:54,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:54,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:54,709 INFO L229 MonitoredProcess]: Starting monitored process 540 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:54,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Waiting until timeout for monitored process [2022-01-18 15:41:54,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:41:54,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:54,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:54,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:54,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:54,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:54,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:54,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:55,012 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:55,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:55,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:55,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031561696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:55,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:55,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:55,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743541198] [2022-01-18 15:41:55,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:55,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:55,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:55,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:55,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:55,047 INFO L87 Difference]: Start difference. First operand 411 states and 1103 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:55,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:55,496 INFO L93 Difference]: Finished difference Result 528 states and 1328 transitions. [2022-01-18 15:41:55,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:41:55,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:55,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:55,496 INFO L225 Difference]: With dead ends: 528 [2022-01-18 15:41:55,496 INFO L226 Difference]: Without dead ends: 528 [2022-01-18 15:41:55,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:41:55,497 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 74 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:55,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 140 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:55,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-18 15:41:55,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 414. [2022-01-18 15:41:55,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.694915254237288) internal successors, (1113), 413 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:55,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1113 transitions. [2022-01-18 15:41:55,501 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1113 transitions. Word has length 19 [2022-01-18 15:41:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:55,501 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 1113 transitions. [2022-01-18 15:41:55,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1113 transitions. [2022-01-18 15:41:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:55,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:55,502 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:55,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (540)] Ended with exit code 0 [2022-01-18 15:41:55,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable556,540 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:55,702 INFO L402 AbstractCegarLoop]: === Iteration 558 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:55,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:55,702 INFO L85 PathProgramCache]: Analyzing trace with hash 37872656, now seen corresponding path program 537 times [2022-01-18 15:41:55,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:55,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632078836] [2022-01-18 15:41:55,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:55,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:55,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:55,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632078836] [2022-01-18 15:41:55,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632078836] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:55,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375801739] [2022-01-18 15:41:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:41:55,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:55,793 INFO L229 MonitoredProcess]: Starting monitored process 541 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Waiting until timeout for monitored process [2022-01-18 15:41:55,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:41:55,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:55,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:55,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:55,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:55,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:55,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:55,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:55,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:56,080 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:56,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:56,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:56,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:56,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375801739] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:56,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:56,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:56,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776131114] [2022-01-18 15:41:56,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:56,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:56,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:56,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:56,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:56,114 INFO L87 Difference]: Start difference. First operand 414 states and 1113 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:57,061 INFO L93 Difference]: Finished difference Result 602 states and 1486 transitions. [2022-01-18 15:41:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-18 15:41:57,062 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:57,062 INFO L225 Difference]: With dead ends: 602 [2022-01-18 15:41:57,062 INFO L226 Difference]: Without dead ends: 596 [2022-01-18 15:41:57,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 15:41:57,063 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 85 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:57,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 138 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-18 15:41:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 407. [2022-01-18 15:41:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.6921182266009853) internal successors, (1093), 406 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1093 transitions. [2022-01-18 15:41:57,067 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1093 transitions. Word has length 19 [2022-01-18 15:41:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:57,067 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1093 transitions. [2022-01-18 15:41:57,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:57,067 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1093 transitions. [2022-01-18 15:41:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:57,068 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:57,068 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:57,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (541)] Ended with exit code 0 [2022-01-18 15:41:57,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,541 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:57,268 INFO L402 AbstractCegarLoop]: === Iteration 559 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:57,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:57,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1468493580, now seen corresponding path program 538 times [2022-01-18 15:41:57,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:57,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978250227] [2022-01-18 15:41:57,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:57,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:57,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:57,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978250227] [2022-01-18 15:41:57,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978250227] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:57,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039926020] [2022-01-18 15:41:57,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:41:57,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:57,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:57,358 INFO L229 MonitoredProcess]: Starting monitored process 542 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:57,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Waiting until timeout for monitored process [2022-01-18 15:41:57,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:41:57,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:57,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:57,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:57,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:57,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:41:57,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:57,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:41:57,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:57,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:57,654 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:57,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:41:57,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:41:57,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:57,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039926020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:57,684 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:57,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:57,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791695308] [2022-01-18 15:41:57,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:57,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:57,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:57,685 INFO L87 Difference]: Start difference. First operand 407 states and 1093 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:58,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:58,219 INFO L93 Difference]: Finished difference Result 517 states and 1299 transitions. [2022-01-18 15:41:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:41:58,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:58,220 INFO L225 Difference]: With dead ends: 517 [2022-01-18 15:41:58,220 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:41:58,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-01-18 15:41:58,220 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:58,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 150 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:58,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:41:58,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 407. [2022-01-18 15:41:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.689655172413793) internal successors, (1092), 406 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:58,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1092 transitions. [2022-01-18 15:41:58,225 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1092 transitions. Word has length 19 [2022-01-18 15:41:58,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:58,225 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1092 transitions. [2022-01-18 15:41:58,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:58,225 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1092 transitions. [2022-01-18 15:41:58,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:58,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:58,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:58,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (542)] Ended with exit code 0 [2022-01-18 15:41:58,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable558,542 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:58,426 INFO L402 AbstractCegarLoop]: === Iteration 560 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:58,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:58,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1158597132, now seen corresponding path program 539 times [2022-01-18 15:41:58,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:58,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223867215] [2022-01-18 15:41:58,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:58,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:58,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223867215] [2022-01-18 15:41:58,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223867215] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:58,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501739061] [2022-01-18 15:41:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:41:58,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:58,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:58,520 INFO L229 MonitoredProcess]: Starting monitored process 543 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:58,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Waiting until timeout for monitored process [2022-01-18 15:41:58,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:41:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:58,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:58,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:41:58,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:58,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:41:58,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:41:58,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:41:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:58,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:41:58,786 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:41:58,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:41:58,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:41:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:58,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501739061] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:41:58,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:41:58,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:41:58,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516495880] [2022-01-18 15:41:58,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:41:58,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:41:58,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:41:58,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:41:58,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:41:58,813 INFO L87 Difference]: Start difference. First operand 407 states and 1092 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:41:59,594 INFO L93 Difference]: Finished difference Result 621 states and 1507 transitions. [2022-01-18 15:41:59,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:41:59,594 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:41:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:41:59,595 INFO L225 Difference]: With dead ends: 621 [2022-01-18 15:41:59,595 INFO L226 Difference]: Without dead ends: 621 [2022-01-18 15:41:59,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-01-18 15:41:59,595 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:41:59,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 175 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:41:59,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2022-01-18 15:41:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 399. [2022-01-18 15:41:59,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.6834170854271355) internal successors, (1068), 398 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1068 transitions. [2022-01-18 15:41:59,600 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1068 transitions. Word has length 19 [2022-01-18 15:41:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:41:59,600 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1068 transitions. [2022-01-18 15:41:59,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:41:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1068 transitions. [2022-01-18 15:41:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:41:59,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:41:59,600 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:41:59,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (543)] Ended with exit code 0 [2022-01-18 15:41:59,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,543 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:59,805 INFO L402 AbstractCegarLoop]: === Iteration 561 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:41:59,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:41:59,805 INFO L85 PathProgramCache]: Analyzing trace with hash -2003723382, now seen corresponding path program 540 times [2022-01-18 15:41:59,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:41:59,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573517145] [2022-01-18 15:41:59,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:41:59,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:41:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:41:59,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:41:59,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:41:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573517145] [2022-01-18 15:41:59,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573517145] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:41:59,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914039756] [2022-01-18 15:41:59,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:41:59,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:41:59,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:41:59,899 INFO L229 MonitoredProcess]: Starting monitored process 544 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:41:59,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Waiting until timeout for monitored process [2022-01-18 15:41:59,924 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:41:59,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:41:59,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:41:59,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:00,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:00,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:42:00,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:00,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:42:00,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:00,202 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:00,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:00,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914039756] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:00,233 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:00,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:42:00,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498046708] [2022-01-18 15:42:00,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:00,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:00,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:00,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:00,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:00,233 INFO L87 Difference]: Start difference. First operand 399 states and 1068 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:00,600 INFO L93 Difference]: Finished difference Result 452 states and 1169 transitions. [2022-01-18 15:42:00,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:42:00,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:00,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:00,601 INFO L225 Difference]: With dead ends: 452 [2022-01-18 15:42:00,601 INFO L226 Difference]: Without dead ends: 444 [2022-01-18 15:42:00,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:42:00,601 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 38 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:00,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 113 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:00,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-01-18 15:42:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 399. [2022-01-18 15:42:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.680904522613065) internal successors, (1067), 398 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:00,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1067 transitions. [2022-01-18 15:42:00,605 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1067 transitions. Word has length 19 [2022-01-18 15:42:00,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:00,605 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1067 transitions. [2022-01-18 15:42:00,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1067 transitions. [2022-01-18 15:42:00,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:00,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:00,605 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:00,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (544)] Ended with exit code 0 [2022-01-18 15:42:00,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,544 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:00,806 INFO L402 AbstractCegarLoop]: === Iteration 562 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:00,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:00,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2060659008, now seen corresponding path program 541 times [2022-01-18 15:42:00,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:00,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352898225] [2022-01-18 15:42:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:00,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:00,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:00,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:00,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352898225] [2022-01-18 15:42:00,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352898225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:00,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974056950] [2022-01-18 15:42:00,898 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:00,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:00,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:00,899 INFO L229 MonitoredProcess]: Starting monitored process 545 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:00,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Waiting until timeout for monitored process [2022-01-18 15:42:00,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:00,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:00,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:01,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:01,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:01,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:01,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:01,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:01,181 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:01,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:01,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974056950] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:01,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:01,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:42:01,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143261495] [2022-01-18 15:42:01,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:01,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:01,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:01,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:01,209 INFO L87 Difference]: Start difference. First operand 399 states and 1067 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:01,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:01,680 INFO L93 Difference]: Finished difference Result 543 states and 1357 transitions. [2022-01-18 15:42:01,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:42:01,680 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:01,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:01,681 INFO L225 Difference]: With dead ends: 543 [2022-01-18 15:42:01,681 INFO L226 Difference]: Without dead ends: 543 [2022-01-18 15:42:01,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:01,681 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:01,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 112 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-18 15:42:01,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 398. [2022-01-18 15:42:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.6826196473551636) internal successors, (1065), 397 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1065 transitions. [2022-01-18 15:42:01,686 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1065 transitions. Word has length 19 [2022-01-18 15:42:01,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:01,686 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1065 transitions. [2022-01-18 15:42:01,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:01,686 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1065 transitions. [2022-01-18 15:42:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:01,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:01,686 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:01,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (545)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:01,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,545 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:01,887 INFO L402 AbstractCegarLoop]: === Iteration 563 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:01,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:01,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1415978060, now seen corresponding path program 542 times [2022-01-18 15:42:01,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:01,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296735193] [2022-01-18 15:42:01,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:01,887 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:01,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296735193] [2022-01-18 15:42:01,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296735193] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330537300] [2022-01-18 15:42:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:01,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:01,987 INFO L229 MonitoredProcess]: Starting monitored process 546 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:01,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Waiting until timeout for monitored process [2022-01-18 15:42:02,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:02,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:02,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:02,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:42:02,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:02,183 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:42:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:02,299 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:02,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:02,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330537300] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:02,330 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:02,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:42:02,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415445012] [2022-01-18 15:42:02,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:02,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:02,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:02,331 INFO L87 Difference]: Start difference. First operand 398 states and 1065 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:02,595 INFO L93 Difference]: Finished difference Result 445 states and 1155 transitions. [2022-01-18 15:42:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:42:02,595 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:02,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:02,596 INFO L225 Difference]: With dead ends: 445 [2022-01-18 15:42:02,596 INFO L226 Difference]: Without dead ends: 433 [2022-01-18 15:42:02,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:42:02,596 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 30 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:02,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:02,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-18 15:42:02,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 398. [2022-01-18 15:42:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.6801007556675063) internal successors, (1064), 397 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1064 transitions. [2022-01-18 15:42:02,600 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1064 transitions. Word has length 19 [2022-01-18 15:42:02,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:02,600 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1064 transitions. [2022-01-18 15:42:02,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:02,600 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1064 transitions. [2022-01-18 15:42:02,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:02,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:02,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:02,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (546)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:02,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 546 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2022-01-18 15:42:02,801 INFO L402 AbstractCegarLoop]: === Iteration 564 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:02,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1221615756, now seen corresponding path program 543 times [2022-01-18 15:42:02,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:02,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679858726] [2022-01-18 15:42:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:02,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:02,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679858726] [2022-01-18 15:42:02,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679858726] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:02,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728633890] [2022-01-18 15:42:02,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:02,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:02,903 INFO L229 MonitoredProcess]: Starting monitored process 547 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:02,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Waiting until timeout for monitored process [2022-01-18 15:42:02,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:42:02,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:02,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:03,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:03,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:03,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:03,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:03,183 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:03,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:03,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:03,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728633890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:03,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:03,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-01-18 15:42:03,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458319468] [2022-01-18 15:42:03,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:03,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:03,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:03,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:03,211 INFO L87 Difference]: Start difference. First operand 398 states and 1064 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:03,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:03,499 INFO L93 Difference]: Finished difference Result 495 states and 1258 transitions. [2022-01-18 15:42:03,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:42:03,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:03,500 INFO L225 Difference]: With dead ends: 495 [2022-01-18 15:42:03,500 INFO L226 Difference]: Without dead ends: 495 [2022-01-18 15:42:03,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:42:03,500 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 40 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:03,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 124 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-01-18 15:42:03,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 395. [2022-01-18 15:42:03,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.6751269035532994) internal successors, (1054), 394 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:03,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1054 transitions. [2022-01-18 15:42:03,504 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1054 transitions. Word has length 19 [2022-01-18 15:42:03,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:03,504 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1054 transitions. [2022-01-18 15:42:03,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:03,504 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1054 transitions. [2022-01-18 15:42:03,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:03,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:03,505 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:03,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (547)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 547 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable563 [2022-01-18 15:42:03,705 INFO L402 AbstractCegarLoop]: === Iteration 565 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:03,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:03,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1023419908, now seen corresponding path program 544 times [2022-01-18 15:42:03,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:03,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257295984] [2022-01-18 15:42:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:03,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257295984] [2022-01-18 15:42:03,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257295984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:03,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137997127] [2022-01-18 15:42:03,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:03,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:03,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:03,806 INFO L229 MonitoredProcess]: Starting monitored process 548 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:03,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Waiting until timeout for monitored process [2022-01-18 15:42:03,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:03,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:03,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:03,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:04,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:04,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:04,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:04,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:04,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:04,189 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:04,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:04,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:04,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137997127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:04,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:04,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:04,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820496546] [2022-01-18 15:42:04,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:04,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:04,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:04,217 INFO L87 Difference]: Start difference. First operand 395 states and 1054 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:04,380 INFO L93 Difference]: Finished difference Result 549 states and 1348 transitions. [2022-01-18 15:42:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:04,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:04,381 INFO L225 Difference]: With dead ends: 549 [2022-01-18 15:42:04,381 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:42:04,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:04,381 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:04,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 367 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 359 Invalid, 0 Unknown, 238 Unchecked, 0.2s Time] [2022-01-18 15:42:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:42:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 403. [2022-01-18 15:42:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.689054726368159) internal successors, (1081), 402 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1081 transitions. [2022-01-18 15:42:04,386 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1081 transitions. Word has length 19 [2022-01-18 15:42:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:04,386 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1081 transitions. [2022-01-18 15:42:04,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1081 transitions. [2022-01-18 15:42:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:04,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:04,387 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:04,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (548)] Ended with exit code 0 [2022-01-18 15:42:04,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2022-01-18 15:42:04,596 INFO L402 AbstractCegarLoop]: === Iteration 566 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:04,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:04,596 INFO L85 PathProgramCache]: Analyzing trace with hash -924156486, now seen corresponding path program 545 times [2022-01-18 15:42:04,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:04,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562991580] [2022-01-18 15:42:04,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:04,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:04,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:04,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562991580] [2022-01-18 15:42:04,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562991580] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015550879] [2022-01-18 15:42:04,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:04,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:04,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:04,697 INFO L229 MonitoredProcess]: Starting monitored process 549 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:04,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Waiting until timeout for monitored process [2022-01-18 15:42:04,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:42:04,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:04,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:04,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:04,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:04,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:04,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:04,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:05,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:05,104 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:05,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:05,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:05,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015550879] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:05,132 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:05,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:05,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896265283] [2022-01-18 15:42:05,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:05,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:05,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:05,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:05,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:05,132 INFO L87 Difference]: Start difference. First operand 403 states and 1081 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:05,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:05,386 INFO L93 Difference]: Finished difference Result 500 states and 1257 transitions. [2022-01-18 15:42:05,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:42:05,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:05,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:05,387 INFO L225 Difference]: With dead ends: 500 [2022-01-18 15:42:05,387 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:42:05,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:42:05,387 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:05,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 328 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 430 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-01-18 15:42:05,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:42:05,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 423. [2022-01-18 15:42:05,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 2.6658767772511847) internal successors, (1125), 422 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:05,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 1125 transitions. [2022-01-18 15:42:05,391 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 1125 transitions. Word has length 19 [2022-01-18 15:42:05,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:05,391 INFO L470 AbstractCegarLoop]: Abstraction has 423 states and 1125 transitions. [2022-01-18 15:42:05,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:05,391 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 1125 transitions. [2022-01-18 15:42:05,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:05,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:05,392 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:05,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (549)] Ended with exit code 0 [2022-01-18 15:42:05,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2022-01-18 15:42:05,592 INFO L402 AbstractCegarLoop]: === Iteration 567 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:05,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:05,592 INFO L85 PathProgramCache]: Analyzing trace with hash -770695268, now seen corresponding path program 546 times [2022-01-18 15:42:05,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:05,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774639660] [2022-01-18 15:42:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:05,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:05,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:05,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:05,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774639660] [2022-01-18 15:42:05,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774639660] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:05,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604556130] [2022-01-18 15:42:05,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:05,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:05,697 INFO L229 MonitoredProcess]: Starting monitored process 550 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:05,697 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Waiting until timeout for monitored process [2022-01-18 15:42:05,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:05,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:05,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:05,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:05,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:05,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:06,029 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:06,120 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:06,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:06,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:06,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604556130] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:06,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:06,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951708973] [2022-01-18 15:42:06,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:06,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:06,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:06,149 INFO L87 Difference]: Start difference. First operand 423 states and 1125 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:06,485 INFO L93 Difference]: Finished difference Result 527 states and 1279 transitions. [2022-01-18 15:42:06,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:42:06,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:06,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:06,486 INFO L225 Difference]: With dead ends: 527 [2022-01-18 15:42:06,486 INFO L226 Difference]: Without dead ends: 519 [2022-01-18 15:42:06,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:42:06,486 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 63 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:06,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 545 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 637 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2022-01-18 15:42:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-01-18 15:42:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 419. [2022-01-18 15:42:06,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.672248803827751) internal successors, (1117), 418 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1117 transitions. [2022-01-18 15:42:06,490 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1117 transitions. Word has length 19 [2022-01-18 15:42:06,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:06,491 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1117 transitions. [2022-01-18 15:42:06,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:06,491 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1117 transitions. [2022-01-18 15:42:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:06,491 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:06,491 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:06,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (550)] Ended with exit code 0 [2022-01-18 15:42:06,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,550 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:06,691 INFO L402 AbstractCegarLoop]: === Iteration 568 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:06,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:06,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1342150074, now seen corresponding path program 547 times [2022-01-18 15:42:06,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:06,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412323883] [2022-01-18 15:42:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:06,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:06,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412323883] [2022-01-18 15:42:06,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412323883] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:06,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549102461] [2022-01-18 15:42:06,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:06,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:06,793 INFO L229 MonitoredProcess]: Starting monitored process 551 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:06,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Waiting until timeout for monitored process [2022-01-18 15:42:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:06,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:07,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:07,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:07,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:07,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:07,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:07,214 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:07,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:07,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:07,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:07,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549102461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:07,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:07,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:07,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392516756] [2022-01-18 15:42:07,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:07,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:07,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:07,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:07,243 INFO L87 Difference]: Start difference. First operand 419 states and 1117 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:07,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:07,562 INFO L93 Difference]: Finished difference Result 515 states and 1264 transitions. [2022-01-18 15:42:07,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:42:07,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:07,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:07,563 INFO L225 Difference]: With dead ends: 515 [2022-01-18 15:42:07,563 INFO L226 Difference]: Without dead ends: 505 [2022-01-18 15:42:07,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:42:07,563 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 58 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:07,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 439 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 621 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-01-18 15:42:07,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-01-18 15:42:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 417. [2022-01-18 15:42:07,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.675480769230769) internal successors, (1113), 416 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:07,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1113 transitions. [2022-01-18 15:42:07,568 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1113 transitions. Word has length 19 [2022-01-18 15:42:07,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:07,568 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1113 transitions. [2022-01-18 15:42:07,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:07,568 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1113 transitions. [2022-01-18 15:42:07,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:07,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:07,568 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:07,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (551)] Ended with exit code 0 [2022-01-18 15:42:07,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable567 [2022-01-18 15:42:07,769 INFO L402 AbstractCegarLoop]: === Iteration 569 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:07,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1877379876, now seen corresponding path program 548 times [2022-01-18 15:42:07,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:07,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392712111] [2022-01-18 15:42:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:07,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:07,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392712111] [2022-01-18 15:42:07,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392712111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:07,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621904577] [2022-01-18 15:42:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:07,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:07,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:07,871 INFO L229 MonitoredProcess]: Starting monitored process 552 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:07,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Waiting until timeout for monitored process [2022-01-18 15:42:07,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:07,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:08,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:08,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:08,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:08,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:08,308 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:08,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:08,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:08,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:08,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621904577] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:08,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:08,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:08,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737570124] [2022-01-18 15:42:08,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:08,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:08,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:08,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:08,338 INFO L87 Difference]: Start difference. First operand 417 states and 1113 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:08,707 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2022-01-18 15:42:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:42:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:08,708 INFO L225 Difference]: With dead ends: 523 [2022-01-18 15:42:08,708 INFO L226 Difference]: Without dead ends: 511 [2022-01-18 15:42:08,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:42:08,708 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 65 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:08,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 379 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 601 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-01-18 15:42:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-18 15:42:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 419. [2022-01-18 15:42:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.6698564593301435) internal successors, (1116), 418 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1116 transitions. [2022-01-18 15:42:08,713 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1116 transitions. Word has length 19 [2022-01-18 15:42:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1116 transitions. [2022-01-18 15:42:08,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:08,713 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1116 transitions. [2022-01-18 15:42:08,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:08,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:08,714 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:08,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (552)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:08,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2022-01-18 15:42:08,914 INFO L402 AbstractCegarLoop]: === Iteration 570 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1325847372, now seen corresponding path program 549 times [2022-01-18 15:42:08,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:08,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422358869] [2022-01-18 15:42:08,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:08,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:09,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:09,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422358869] [2022-01-18 15:42:09,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422358869] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:09,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215544223] [2022-01-18 15:42:09,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:09,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:09,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:09,015 INFO L229 MonitoredProcess]: Starting monitored process 553 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:09,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Waiting until timeout for monitored process [2022-01-18 15:42:09,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:42:09,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:09,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:09,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:09,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:09,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:09,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:09,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:09,392 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:09,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:09,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215544223] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:09,416 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:09,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:09,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785648352] [2022-01-18 15:42:09,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:09,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:09,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:09,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:09,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:09,416 INFO L87 Difference]: Start difference. First operand 419 states and 1116 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:09,762 INFO L93 Difference]: Finished difference Result 621 states and 1497 transitions. [2022-01-18 15:42:09,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 15:42:09,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:09,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:09,763 INFO L225 Difference]: With dead ends: 621 [2022-01-18 15:42:09,763 INFO L226 Difference]: Without dead ends: 612 [2022-01-18 15:42:09,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:42:09,763 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 94 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:09,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 422 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 503 Invalid, 0 Unknown, 272 Unchecked, 0.2s Time] [2022-01-18 15:42:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2022-01-18 15:42:09,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 434. [2022-01-18 15:42:09,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.695150115473441) internal successors, (1167), 433 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:09,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1167 transitions. [2022-01-18 15:42:09,768 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1167 transitions. Word has length 19 [2022-01-18 15:42:09,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:09,768 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1167 transitions. [2022-01-18 15:42:09,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:09,768 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1167 transitions. [2022-01-18 15:42:09,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:09,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:09,768 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:09,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (553)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:09,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 553 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2022-01-18 15:42:09,969 INFO L402 AbstractCegarLoop]: === Iteration 571 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:09,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1797916222, now seen corresponding path program 550 times [2022-01-18 15:42:09,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561013983] [2022-01-18 15:42:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:09,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:09,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:10,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561013983] [2022-01-18 15:42:10,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561013983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:10,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844269902] [2022-01-18 15:42:10,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:10,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:10,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:10,075 INFO L229 MonitoredProcess]: Starting monitored process 554 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:10,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Waiting until timeout for monitored process [2022-01-18 15:42:10,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:10,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:10,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:10,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:10,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:10,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:10,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:10,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:10,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:10,478 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:10,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:10,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:10,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844269902] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:10,506 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:10,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:10,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240683419] [2022-01-18 15:42:10,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:10,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:10,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:10,506 INFO L87 Difference]: Start difference. First operand 434 states and 1167 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:10,901 INFO L93 Difference]: Finished difference Result 550 states and 1356 transitions. [2022-01-18 15:42:10,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:42:10,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:10,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:10,902 INFO L225 Difference]: With dead ends: 550 [2022-01-18 15:42:10,902 INFO L226 Difference]: Without dead ends: 541 [2022-01-18 15:42:10,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:10,903 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 69 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:10,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 414 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 496 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-01-18 15:42:10,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2022-01-18 15:42:10,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 446. [2022-01-18 15:42:10,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 2.6808988764044943) internal successors, (1193), 445 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 1193 transitions. [2022-01-18 15:42:10,907 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 1193 transitions. Word has length 19 [2022-01-18 15:42:10,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:10,907 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 1193 transitions. [2022-01-18 15:42:10,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:10,907 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 1193 transitions. [2022-01-18 15:42:10,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:10,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:10,908 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:10,923 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (554)] Ended with exit code 0 [2022-01-18 15:42:11,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,554 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:11,108 INFO L402 AbstractCegarLoop]: === Iteration 572 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:11,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1951377440, now seen corresponding path program 551 times [2022-01-18 15:42:11,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:11,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141197274] [2022-01-18 15:42:11,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:11,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:11,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141197274] [2022-01-18 15:42:11,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141197274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:11,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782346031] [2022-01-18 15:42:11,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:11,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:11,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:11,214 INFO L229 MonitoredProcess]: Starting monitored process 555 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:11,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Waiting until timeout for monitored process [2022-01-18 15:42:11,240 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:42:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:11,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:11,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:11,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:11,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:11,645 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:11,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:11,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:11,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:11,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782346031] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:11,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:11,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:11,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332037972] [2022-01-18 15:42:11,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:11,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:11,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:11,672 INFO L87 Difference]: Start difference. First operand 446 states and 1193 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:12,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:12,164 INFO L93 Difference]: Finished difference Result 570 states and 1369 transitions. [2022-01-18 15:42:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:42:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:12,165 INFO L225 Difference]: With dead ends: 570 [2022-01-18 15:42:12,165 INFO L226 Difference]: Without dead ends: 549 [2022-01-18 15:42:12,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:42:12,165 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 75 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:12,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 488 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 689 Invalid, 0 Unknown, 142 Unchecked, 0.2s Time] [2022-01-18 15:42:12,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-18 15:42:12,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 434. [2022-01-18 15:42:12,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.6859122401847575) internal successors, (1163), 433 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:12,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1163 transitions. [2022-01-18 15:42:12,170 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1163 transitions. Word has length 19 [2022-01-18 15:42:12,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:12,170 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1163 transitions. [2022-01-18 15:42:12,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:12,170 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1163 transitions. [2022-01-18 15:42:12,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:12,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:12,170 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:12,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (555)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:12,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,555 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:12,371 INFO L402 AbstractCegarLoop]: === Iteration 573 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:12,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:12,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1955819516, now seen corresponding path program 552 times [2022-01-18 15:42:12,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:12,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066877428] [2022-01-18 15:42:12,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:12,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066877428] [2022-01-18 15:42:12,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066877428] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:12,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037935958] [2022-01-18 15:42:12,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:12,473 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:12,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:12,474 INFO L229 MonitoredProcess]: Starting monitored process 556 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:12,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Waiting until timeout for monitored process [2022-01-18 15:42:12,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:12,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:12,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:12,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:12,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:12,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:12,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:12,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:12,863 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:12,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:12,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:12,886 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:12,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037935958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:12,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:12,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:12,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648751432] [2022-01-18 15:42:12,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:12,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:12,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:12,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:12,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:12,887 INFO L87 Difference]: Start difference. First operand 434 states and 1163 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:13,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:13,618 INFO L93 Difference]: Finished difference Result 672 states and 1572 transitions. [2022-01-18 15:42:13,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 15:42:13,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:13,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:13,619 INFO L225 Difference]: With dead ends: 672 [2022-01-18 15:42:13,619 INFO L226 Difference]: Without dead ends: 645 [2022-01-18 15:42:13,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2022-01-18 15:42:13,620 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 72 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:13,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 310 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 568 Invalid, 0 Unknown, 166 Unchecked, 0.2s Time] [2022-01-18 15:42:13,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-01-18 15:42:13,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 415. [2022-01-18 15:42:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.6642512077294684) internal successors, (1103), 414 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:13,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1103 transitions. [2022-01-18 15:42:13,625 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1103 transitions. Word has length 19 [2022-01-18 15:42:13,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:13,625 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1103 transitions. [2022-01-18 15:42:13,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:13,625 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1103 transitions. [2022-01-18 15:42:13,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:13,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:13,625 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:13,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (556)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:13,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable572 [2022-01-18 15:42:13,826 INFO L402 AbstractCegarLoop]: === Iteration 574 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash 777346362, now seen corresponding path program 553 times [2022-01-18 15:42:13,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:13,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029923940] [2022-01-18 15:42:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:13,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:13,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:13,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:13,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029923940] [2022-01-18 15:42:13,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029923940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:13,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854414396] [2022-01-18 15:42:13,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:13,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:13,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:13,927 INFO L229 MonitoredProcess]: Starting monitored process 557 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:13,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Waiting until timeout for monitored process [2022-01-18 15:42:13,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:13,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:13,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:14,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:14,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:14,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:14,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:14,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:14,374 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:14,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:14,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:14,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854414396] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:14,402 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:14,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:14,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339302774] [2022-01-18 15:42:14,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:14,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:14,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:14,403 INFO L87 Difference]: Start difference. First operand 415 states and 1103 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:14,832 INFO L93 Difference]: Finished difference Result 492 states and 1215 transitions. [2022-01-18 15:42:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:42:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:14,833 INFO L225 Difference]: With dead ends: 492 [2022-01-18 15:42:14,833 INFO L226 Difference]: Without dead ends: 483 [2022-01-18 15:42:14,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:42:14,834 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 78 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:14,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 308 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 499 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-01-18 15:42:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-18 15:42:14,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 417. [2022-01-18 15:42:14,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.65625) internal successors, (1105), 416 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:14,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1105 transitions. [2022-01-18 15:42:14,838 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1105 transitions. Word has length 19 [2022-01-18 15:42:14,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:14,838 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1105 transitions. [2022-01-18 15:42:14,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:14,838 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1105 transitions. [2022-01-18 15:42:14,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:14,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:14,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:14,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (557)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:15,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 557 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2022-01-18 15:42:15,039 INFO L402 AbstractCegarLoop]: === Iteration 575 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:15,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:15,039 INFO L85 PathProgramCache]: Analyzing trace with hash 930807580, now seen corresponding path program 554 times [2022-01-18 15:42:15,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:15,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802730022] [2022-01-18 15:42:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:15,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:15,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:15,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:15,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:15,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802730022] [2022-01-18 15:42:15,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802730022] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:15,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951242782] [2022-01-18 15:42:15,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:15,141 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:15,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:15,141 INFO L229 MonitoredProcess]: Starting monitored process 558 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:15,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Waiting until timeout for monitored process [2022-01-18 15:42:15,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:15,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:15,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:15,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:15,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:15,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:15,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:15,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:15,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:15,578 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:15,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:15,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:15,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:15,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951242782] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:15,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:15,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:15,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000675513] [2022-01-18 15:42:15,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:15,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:15,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:15,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:15,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:15,606 INFO L87 Difference]: Start difference. First operand 417 states and 1105 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:15,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:15,979 INFO L93 Difference]: Finished difference Result 469 states and 1182 transitions. [2022-01-18 15:42:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-18 15:42:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:15,980 INFO L225 Difference]: With dead ends: 469 [2022-01-18 15:42:15,980 INFO L226 Difference]: Without dead ends: 461 [2022-01-18 15:42:15,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:42:15,981 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 54 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:15,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 269 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 385 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2022-01-18 15:42:15,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-01-18 15:42:15,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 417. [2022-01-18 15:42:15,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.6538461538461537) internal successors, (1104), 416 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1104 transitions. [2022-01-18 15:42:15,985 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1104 transitions. Word has length 19 [2022-01-18 15:42:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:15,985 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1104 transitions. [2022-01-18 15:42:15,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1104 transitions. [2022-01-18 15:42:15,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:15,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:15,985 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:16,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (558)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:16,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2022-01-18 15:42:16,186 INFO L402 AbstractCegarLoop]: === Iteration 576 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash 240616116, now seen corresponding path program 555 times [2022-01-18 15:42:16,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:16,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703061663] [2022-01-18 15:42:16,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:16,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:16,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703061663] [2022-01-18 15:42:16,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703061663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:16,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124498173] [2022-01-18 15:42:16,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:16,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:16,287 INFO L229 MonitoredProcess]: Starting monitored process 559 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:16,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Waiting until timeout for monitored process [2022-01-18 15:42:16,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:42:16,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:16,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:16,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:16,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:16,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:16,637 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:16,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:16,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:16,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124498173] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:16,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:16,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:16,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010216360] [2022-01-18 15:42:16,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:16,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:16,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:16,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:16,662 INFO L87 Difference]: Start difference. First operand 417 states and 1104 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:17,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:17,228 INFO L93 Difference]: Finished difference Result 542 states and 1293 transitions. [2022-01-18 15:42:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:42:17,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:17,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:17,229 INFO L225 Difference]: With dead ends: 542 [2022-01-18 15:42:17,229 INFO L226 Difference]: Without dead ends: 533 [2022-01-18 15:42:17,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:42:17,229 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 98 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:17,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 298 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 377 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-01-18 15:42:17,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-18 15:42:17,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 407. [2022-01-18 15:42:17,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.6403940886699506) internal successors, (1072), 406 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:17,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1072 transitions. [2022-01-18 15:42:17,234 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1072 transitions. Word has length 19 [2022-01-18 15:42:17,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:17,234 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1072 transitions. [2022-01-18 15:42:17,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1072 transitions. [2022-01-18 15:42:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:17,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:17,234 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:17,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (559)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:17,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2022-01-18 15:42:17,435 INFO L402 AbstractCegarLoop]: === Iteration 577 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:17,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1160066750, now seen corresponding path program 556 times [2022-01-18 15:42:17,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:17,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946469168] [2022-01-18 15:42:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:17,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:17,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:17,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946469168] [2022-01-18 15:42:17,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946469168] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:17,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922969368] [2022-01-18 15:42:17,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:17,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:17,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:17,542 INFO L229 MonitoredProcess]: Starting monitored process 560 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:17,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Waiting until timeout for monitored process [2022-01-18 15:42:17,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:17,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:17,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:17,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:17,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:17,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:17,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:17,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:17,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:17,940 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:17,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:17,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:17,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:17,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922969368] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:17,967 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:17,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:17,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288881257] [2022-01-18 15:42:17,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:17,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:17,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:17,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:17,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:17,967 INFO L87 Difference]: Start difference. First operand 407 states and 1072 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:18,590 INFO L93 Difference]: Finished difference Result 512 states and 1238 transitions. [2022-01-18 15:42:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:42:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:18,591 INFO L225 Difference]: With dead ends: 512 [2022-01-18 15:42:18,591 INFO L226 Difference]: Without dead ends: 503 [2022-01-18 15:42:18,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:42:18,591 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 147 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:18,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 277 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 564 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-01-18 15:42:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-18 15:42:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 410. [2022-01-18 15:42:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.645476772616137) internal successors, (1082), 409 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1082 transitions. [2022-01-18 15:42:18,596 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1082 transitions. Word has length 19 [2022-01-18 15:42:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:18,596 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1082 transitions. [2022-01-18 15:42:18,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1082 transitions. [2022-01-18 15:42:18,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:18,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:18,596 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:18,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (560)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:18,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2022-01-18 15:42:18,797 INFO L402 AbstractCegarLoop]: === Iteration 578 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:18,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:18,797 INFO L85 PathProgramCache]: Analyzing trace with hash -346299486, now seen corresponding path program 557 times [2022-01-18 15:42:18,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:18,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110289483] [2022-01-18 15:42:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:18,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:18,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110289483] [2022-01-18 15:42:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110289483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:18,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013182317] [2022-01-18 15:42:18,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:18,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:18,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:18,894 INFO L229 MonitoredProcess]: Starting monitored process 561 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:18,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Waiting until timeout for monitored process [2022-01-18 15:42:18,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:42:18,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:18,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:18,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:19,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:19,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:19,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:19,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:19,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:19,228 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:19,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:19,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:19,251 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:19,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013182317] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:19,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:19,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:19,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462527101] [2022-01-18 15:42:19,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:19,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:19,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:19,252 INFO L87 Difference]: Start difference. First operand 410 states and 1082 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:19,894 INFO L93 Difference]: Finished difference Result 459 states and 1146 transitions. [2022-01-18 15:42:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:42:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:19,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:19,895 INFO L225 Difference]: With dead ends: 459 [2022-01-18 15:42:19,895 INFO L226 Difference]: Without dead ends: 453 [2022-01-18 15:42:19,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:42:19,895 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:19,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 126 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 311 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2022-01-18 15:42:19,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-18 15:42:19,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 410. [2022-01-18 15:42:19,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.640586797066015) internal successors, (1080), 409 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:19,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1080 transitions. [2022-01-18 15:42:19,899 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1080 transitions. Word has length 19 [2022-01-18 15:42:19,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:19,899 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1080 transitions. [2022-01-18 15:42:19,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:19,900 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1080 transitions. [2022-01-18 15:42:19,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:19,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:19,900 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:19,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (561)] Ended with exit code 0 [2022-01-18 15:42:20,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2022-01-18 15:42:20,100 INFO L402 AbstractCegarLoop]: === Iteration 579 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:20,101 INFO L85 PathProgramCache]: Analyzing trace with hash -2014176070, now seen corresponding path program 558 times [2022-01-18 15:42:20,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:20,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007885053] [2022-01-18 15:42:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:20,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:20,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007885053] [2022-01-18 15:42:20,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007885053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508357271] [2022-01-18 15:42:20,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:20,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:20,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:20,202 INFO L229 MonitoredProcess]: Starting monitored process 562 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:20,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Waiting until timeout for monitored process [2022-01-18 15:42:20,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:20,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:20,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:20,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:20,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:20,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:20,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:20,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:20,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:20,566 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:20,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:20,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:20,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508357271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:20,605 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:20,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:20,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779315094] [2022-01-18 15:42:20,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:20,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:20,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:20,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:20,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:20,606 INFO L87 Difference]: Start difference. First operand 410 states and 1080 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:20,865 INFO L93 Difference]: Finished difference Result 445 states and 1134 transitions. [2022-01-18 15:42:20,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:20,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:20,866 INFO L225 Difference]: With dead ends: 445 [2022-01-18 15:42:20,866 INFO L226 Difference]: Without dead ends: 443 [2022-01-18 15:42:20,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:42:20,866 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 111 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 303 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-01-18 15:42:20,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-18 15:42:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 404. [2022-01-18 15:42:20,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.635235732009926) internal successors, (1062), 403 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1062 transitions. [2022-01-18 15:42:20,870 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1062 transitions. Word has length 19 [2022-01-18 15:42:20,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:20,870 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1062 transitions. [2022-01-18 15:42:20,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1062 transitions. [2022-01-18 15:42:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:20,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:20,871 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:20,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (562)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:21,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,562 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:21,071 INFO L402 AbstractCegarLoop]: === Iteration 580 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:21,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:21,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1604106776, now seen corresponding path program 559 times [2022-01-18 15:42:21,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:21,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824319288] [2022-01-18 15:42:21,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:21,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:21,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:21,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:21,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824319288] [2022-01-18 15:42:21,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824319288] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:21,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283438268] [2022-01-18 15:42:21,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:21,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:21,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:21,158 INFO L229 MonitoredProcess]: Starting monitored process 563 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:21,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Waiting until timeout for monitored process [2022-01-18 15:42:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:21,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:21,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:21,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:21,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:21,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:21,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:21,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:21,544 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:21,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:21,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:21,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283438268] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:21,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:21,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:21,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626023173] [2022-01-18 15:42:21,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:21,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:21,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:21,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:21,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:21,575 INFO L87 Difference]: Start difference. First operand 404 states and 1062 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:21,854 INFO L93 Difference]: Finished difference Result 420 states and 1087 transitions. [2022-01-18 15:42:21,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:21,855 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:21,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:21,855 INFO L225 Difference]: With dead ends: 420 [2022-01-18 15:42:21,855 INFO L226 Difference]: Without dead ends: 412 [2022-01-18 15:42:21,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:42:21,856 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:21,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 92 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 241 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2022-01-18 15:42:21,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-18 15:42:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 401. [2022-01-18 15:42:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.6425) internal successors, (1057), 400 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1057 transitions. [2022-01-18 15:42:21,859 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1057 transitions. Word has length 19 [2022-01-18 15:42:21,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:21,859 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1057 transitions. [2022-01-18 15:42:21,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:21,860 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1057 transitions. [2022-01-18 15:42:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:21,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:21,860 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:21,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (563)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:22,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2022-01-18 15:42:22,060 INFO L402 AbstractCegarLoop]: === Iteration 581 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:22,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:22,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1644967424, now seen corresponding path program 560 times [2022-01-18 15:42:22,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:22,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722637192] [2022-01-18 15:42:22,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:22,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:22,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722637192] [2022-01-18 15:42:22,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722637192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:22,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711844467] [2022-01-18 15:42:22,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:22,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:22,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:22,147 INFO L229 MonitoredProcess]: Starting monitored process 564 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Waiting until timeout for monitored process [2022-01-18 15:42:22,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:22,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:22,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:22,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:22,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:22,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:22,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:22,487 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:22,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:22,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711844467] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:22,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:22,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:22,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187162695] [2022-01-18 15:42:22,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:22,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:22,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:22,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:22,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:22,515 INFO L87 Difference]: Start difference. First operand 401 states and 1057 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:22,693 INFO L93 Difference]: Finished difference Result 448 states and 1153 transitions. [2022-01-18 15:42:22,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:22,693 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:22,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:22,694 INFO L225 Difference]: With dead ends: 448 [2022-01-18 15:42:22,694 INFO L226 Difference]: Without dead ends: 448 [2022-01-18 15:42:22,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:22,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:22,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 127 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 392 Invalid, 0 Unknown, 116 Unchecked, 0.1s Time] [2022-01-18 15:42:22,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-18 15:42:22,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 407. [2022-01-18 15:42:22,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.6379310344827585) internal successors, (1071), 406 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1071 transitions. [2022-01-18 15:42:22,698 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1071 transitions. Word has length 19 [2022-01-18 15:42:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:22,698 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1071 transitions. [2022-01-18 15:42:22,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1071 transitions. [2022-01-18 15:42:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:22,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:22,699 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:22,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (564)] Ended with exit code 0 [2022-01-18 15:42:22,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,564 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:22,899 INFO L402 AbstractCegarLoop]: === Iteration 582 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:22,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:22,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1473072180, now seen corresponding path program 561 times [2022-01-18 15:42:22,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:22,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705739351] [2022-01-18 15:42:22,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:22,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:22,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705739351] [2022-01-18 15:42:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705739351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:22,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225090141] [2022-01-18 15:42:22,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:22,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:22,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:22,986 INFO L229 MonitoredProcess]: Starting monitored process 565 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:22,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Waiting until timeout for monitored process [2022-01-18 15:42:23,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:42:23,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:23,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:23,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:23,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:23,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:23,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:23,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:23,349 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:23,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:23,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:23,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225090141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:23,376 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:23,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:23,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917033200] [2022-01-18 15:42:23,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:23,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:23,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:23,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:23,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:23,376 INFO L87 Difference]: Start difference. First operand 407 states and 1071 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:23,582 INFO L93 Difference]: Finished difference Result 450 states and 1155 transitions. [2022-01-18 15:42:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:23,582 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:23,582 INFO L225 Difference]: With dead ends: 450 [2022-01-18 15:42:23,582 INFO L226 Difference]: Without dead ends: 450 [2022-01-18 15:42:23,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:23,583 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:23,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 124 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 311 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-01-18 15:42:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-01-18 15:42:23,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 402. [2022-01-18 15:42:23,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.6433915211970076) internal successors, (1060), 401 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1060 transitions. [2022-01-18 15:42:23,587 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1060 transitions. Word has length 19 [2022-01-18 15:42:23,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:23,587 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1060 transitions. [2022-01-18 15:42:23,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1060 transitions. [2022-01-18 15:42:23,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:23,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:23,587 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:23,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (565)] Ended with exit code 0 [2022-01-18 15:42:23,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,565 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:23,788 INFO L402 AbstractCegarLoop]: === Iteration 583 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:23,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:23,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1262247036, now seen corresponding path program 562 times [2022-01-18 15:42:23,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:23,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294093143] [2022-01-18 15:42:23,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:23,788 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:23,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:23,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:23,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294093143] [2022-01-18 15:42:23,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294093143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:23,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542091682] [2022-01-18 15:42:23,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:23,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:23,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:23,873 INFO L229 MonitoredProcess]: Starting monitored process 566 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:23,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Waiting until timeout for monitored process [2022-01-18 15:42:23,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:23,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:23,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:24,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:24,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:24,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:24,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:24,221 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:24,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:24,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542091682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:24,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:24,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:24,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984773526] [2022-01-18 15:42:24,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:24,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:24,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:24,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:24,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:24,249 INFO L87 Difference]: Start difference. First operand 402 states and 1060 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:24,419 INFO L93 Difference]: Finished difference Result 470 states and 1197 transitions. [2022-01-18 15:42:24,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:24,419 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:24,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:24,420 INFO L225 Difference]: With dead ends: 470 [2022-01-18 15:42:24,420 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:42:24,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-01-18 15:42:24,420 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:24,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 122 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 348 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2022-01-18 15:42:24,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:42:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 402. [2022-01-18 15:42:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.6433915211970076) internal successors, (1060), 401 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1060 transitions. [2022-01-18 15:42:24,424 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1060 transitions. Word has length 19 [2022-01-18 15:42:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:24,424 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1060 transitions. [2022-01-18 15:42:24,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1060 transitions. [2022-01-18 15:42:24,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:24,424 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:24,425 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:24,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (566)] Ended with exit code 0 [2022-01-18 15:42:24,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,566 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:24,625 INFO L402 AbstractCegarLoop]: === Iteration 584 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1478796170, now seen corresponding path program 563 times [2022-01-18 15:42:24,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:24,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083070571] [2022-01-18 15:42:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:24,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:24,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083070571] [2022-01-18 15:42:24,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083070571] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:24,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926629142] [2022-01-18 15:42:24,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:24,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:24,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:24,712 INFO L229 MonitoredProcess]: Starting monitored process 567 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:24,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Waiting until timeout for monitored process [2022-01-18 15:42:24,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:42:24,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:24,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:24,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:24,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:24,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:24,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:24,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:25,077 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:25,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:25,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926629142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:25,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:25,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:25,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234010080] [2022-01-18 15:42:25,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:25,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:25,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:25,109 INFO L87 Difference]: Start difference. First operand 402 states and 1060 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:25,220 INFO L93 Difference]: Finished difference Result 425 states and 1096 transitions. [2022-01-18 15:42:25,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:25,220 INFO L225 Difference]: With dead ends: 425 [2022-01-18 15:42:25,220 INFO L226 Difference]: Without dead ends: 413 [2022-01-18 15:42:25,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:25,221 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:25,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 79 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-01-18 15:42:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-18 15:42:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 404. [2022-01-18 15:42:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.635235732009926) internal successors, (1062), 403 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1062 transitions. [2022-01-18 15:42:25,224 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1062 transitions. Word has length 19 [2022-01-18 15:42:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1062 transitions. [2022-01-18 15:42:25,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1062 transitions. [2022-01-18 15:42:25,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:25,225 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:25,225 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:25,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (567)] Ended with exit code 0 [2022-01-18 15:42:25,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,567 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:25,425 INFO L402 AbstractCegarLoop]: === Iteration 585 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1060802582, now seen corresponding path program 564 times [2022-01-18 15:42:25,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:25,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140169658] [2022-01-18 15:42:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:25,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140169658] [2022-01-18 15:42:25,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140169658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:25,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223251566] [2022-01-18 15:42:25,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:25,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:25,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:25,512 INFO L229 MonitoredProcess]: Starting monitored process 568 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:25,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Waiting until timeout for monitored process [2022-01-18 15:42:25,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:25,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:25,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:25,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:25,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:25,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:25,889 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:25,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:25,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:25,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223251566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:25,921 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:25,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:25,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309422914] [2022-01-18 15:42:25,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:25,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:25,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:25,922 INFO L87 Difference]: Start difference. First operand 404 states and 1062 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:26,025 INFO L93 Difference]: Finished difference Result 419 states and 1082 transitions. [2022-01-18 15:42:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:26,026 INFO L225 Difference]: With dead ends: 419 [2022-01-18 15:42:26,026 INFO L226 Difference]: Without dead ends: 409 [2022-01-18 15:42:26,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:26,026 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:26,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 256 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-01-18 15:42:26,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-01-18 15:42:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 402. [2022-01-18 15:42:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.638403990024938) internal successors, (1058), 401 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1058 transitions. [2022-01-18 15:42:26,030 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1058 transitions. Word has length 19 [2022-01-18 15:42:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:26,030 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1058 transitions. [2022-01-18 15:42:26,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1058 transitions. [2022-01-18 15:42:26,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:26,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:26,030 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:26,046 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (568)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:26,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable584,568 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:26,231 INFO L402 AbstractCegarLoop]: === Iteration 586 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:26,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2020027728, now seen corresponding path program 565 times [2022-01-18 15:42:26,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:26,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728650172] [2022-01-18 15:42:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:26,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:26,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728650172] [2022-01-18 15:42:26,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728650172] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:26,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110871791] [2022-01-18 15:42:26,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:26,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:26,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:26,320 INFO L229 MonitoredProcess]: Starting monitored process 569 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:26,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Waiting until timeout for monitored process [2022-01-18 15:42:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:26,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:26,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:26,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:26,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:26,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:26,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:26,674 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:26,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:26,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:26,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110871791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:26,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:26,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:26,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733515488] [2022-01-18 15:42:26,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:26,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:26,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:26,701 INFO L87 Difference]: Start difference. First operand 402 states and 1058 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:27,000 INFO L93 Difference]: Finished difference Result 498 states and 1255 transitions. [2022-01-18 15:42:27,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:27,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:27,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:27,001 INFO L225 Difference]: With dead ends: 498 [2022-01-18 15:42:27,001 INFO L226 Difference]: Without dead ends: 498 [2022-01-18 15:42:27,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-01-18 15:42:27,001 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:27,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 361 Invalid, 0 Unknown, 140 Unchecked, 0.1s Time] [2022-01-18 15:42:27,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-01-18 15:42:27,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 403. [2022-01-18 15:42:27,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.6393034825870645) internal successors, (1061), 402 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1061 transitions. [2022-01-18 15:42:27,005 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1061 transitions. Word has length 19 [2022-01-18 15:42:27,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:27,005 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1061 transitions. [2022-01-18 15:42:27,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,005 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1061 transitions. [2022-01-18 15:42:27,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:27,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:27,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:27,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (569)] Ended with exit code 0 [2022-01-18 15:42:27,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2022-01-18 15:42:27,206 INFO L402 AbstractCegarLoop]: === Iteration 587 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:27,207 INFO L85 PathProgramCache]: Analyzing trace with hash 458226310, now seen corresponding path program 566 times [2022-01-18 15:42:27,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:27,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591114653] [2022-01-18 15:42:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:27,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:27,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591114653] [2022-01-18 15:42:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591114653] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:27,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598000860] [2022-01-18 15:42:27,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:27,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:27,293 INFO L229 MonitoredProcess]: Starting monitored process 570 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:27,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Waiting until timeout for monitored process [2022-01-18 15:42:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:27,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:27,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:27,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:27,544 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:27,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:27,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:27,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:27,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:27,658 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:27,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:27,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:27,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598000860] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:27,689 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:27,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:27,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109943792] [2022-01-18 15:42:27,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:27,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:27,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:27,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:27,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:27,689 INFO L87 Difference]: Start difference. First operand 403 states and 1061 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:27,799 INFO L93 Difference]: Finished difference Result 421 states and 1089 transitions. [2022-01-18 15:42:27,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:27,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:27,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:27,800 INFO L225 Difference]: With dead ends: 421 [2022-01-18 15:42:27,800 INFO L226 Difference]: Without dead ends: 415 [2022-01-18 15:42:27,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:27,800 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 15 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:27,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 91 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 293 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-01-18 15:42:27,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-18 15:42:27,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 405. [2022-01-18 15:42:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.631188118811881) internal successors, (1063), 404 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1063 transitions. [2022-01-18 15:42:27,804 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1063 transitions. Word has length 19 [2022-01-18 15:42:27,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:27,804 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1063 transitions. [2022-01-18 15:42:27,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:27,804 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1063 transitions. [2022-01-18 15:42:27,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:27,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:27,805 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:27,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (570)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:28,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2022-01-18 15:42:28,005 INFO L402 AbstractCegarLoop]: === Iteration 588 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:28,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:28,005 INFO L85 PathProgramCache]: Analyzing trace with hash 611687528, now seen corresponding path program 567 times [2022-01-18 15:42:28,005 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6085785] [2022-01-18 15:42:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:28,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:28,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:28,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:28,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6085785] [2022-01-18 15:42:28,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6085785] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:28,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217059398] [2022-01-18 15:42:28,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:28,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:28,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:28,092 INFO L229 MonitoredProcess]: Starting monitored process 571 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:28,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Waiting until timeout for monitored process [2022-01-18 15:42:28,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:42:28,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:28,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:28,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:28,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:28,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:28,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:28,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2022-01-18 15:42:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:28,492 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:28,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:28,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:28,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217059398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:28,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:28,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:28,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397477135] [2022-01-18 15:42:28,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:28,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:28,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:28,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:28,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:28,525 INFO L87 Difference]: Start difference. First operand 405 states and 1063 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:28,686 INFO L93 Difference]: Finished difference Result 419 states and 1083 transitions. [2022-01-18 15:42:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:28,687 INFO L225 Difference]: With dead ends: 419 [2022-01-18 15:42:28,687 INFO L226 Difference]: Without dead ends: 411 [2022-01-18 15:42:28,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:28,687 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 13 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:28,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 79 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 311 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-01-18 15:42:28,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-01-18 15:42:28,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 403. [2022-01-18 15:42:28,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.6343283582089554) internal successors, (1059), 402 states have internal predecessors, (1059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1059 transitions. [2022-01-18 15:42:28,691 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1059 transitions. Word has length 19 [2022-01-18 15:42:28,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:28,691 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1059 transitions. [2022-01-18 15:42:28,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:28,691 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1059 transitions. [2022-01-18 15:42:28,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:28,691 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:28,691 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:28,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (571)] Ended with exit code 0 [2022-01-18 15:42:28,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2022-01-18 15:42:28,892 INFO L402 AbstractCegarLoop]: === Iteration 589 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:28,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:28,892 INFO L85 PathProgramCache]: Analyzing trace with hash -78503936, now seen corresponding path program 568 times [2022-01-18 15:42:28,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:28,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053950390] [2022-01-18 15:42:28,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:28,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:28,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:28,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:28,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053950390] [2022-01-18 15:42:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053950390] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:28,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17523000] [2022-01-18 15:42:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:28,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:28,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:28,975 INFO L229 MonitoredProcess]: Starting monitored process 572 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:28,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Waiting until timeout for monitored process [2022-01-18 15:42:28,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:28,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:28,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:29,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:29,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:29,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:29,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:29,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:29,309 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:29,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:29,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:29,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:29,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17523000] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:29,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:29,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:29,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486030437] [2022-01-18 15:42:29,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:29,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:29,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:29,337 INFO L87 Difference]: Start difference. First operand 403 states and 1059 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:29,754 INFO L93 Difference]: Finished difference Result 545 states and 1337 transitions. [2022-01-18 15:42:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-18 15:42:29,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:29,755 INFO L225 Difference]: With dead ends: 545 [2022-01-18 15:42:29,755 INFO L226 Difference]: Without dead ends: 545 [2022-01-18 15:42:29,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:42:29,755 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 54 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:29,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 106 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 347 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-01-18 15:42:29,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-18 15:42:29,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 405. [2022-01-18 15:42:29,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.6386138613861387) internal successors, (1066), 404 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1066 transitions. [2022-01-18 15:42:29,760 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1066 transitions. Word has length 19 [2022-01-18 15:42:29,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:29,760 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1066 transitions. [2022-01-18 15:42:29,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1066 transitions. [2022-01-18 15:42:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:29,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:29,760 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:29,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (572)] Ended with exit code 0 [2022-01-18 15:42:29,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,572 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:29,961 INFO L402 AbstractCegarLoop]: === Iteration 590 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:29,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:29,961 INFO L85 PathProgramCache]: Analyzing trace with hash -665419538, now seen corresponding path program 569 times [2022-01-18 15:42:29,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:29,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87206771] [2022-01-18 15:42:29,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:29,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87206771] [2022-01-18 15:42:30,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87206771] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474751190] [2022-01-18 15:42:30,041 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:30,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:30,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:30,042 INFO L229 MonitoredProcess]: Starting monitored process 573 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:30,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Waiting until timeout for monitored process [2022-01-18 15:42:30,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:42:30,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:30,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:30,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:30,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:30,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:30,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:30,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:30,352 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:30,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:30,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:30,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474751190] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:30,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:30,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:30,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394465976] [2022-01-18 15:42:30,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:30,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:30,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:30,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:30,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:30,379 INFO L87 Difference]: Start difference. First operand 405 states and 1066 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:30,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:30,832 INFO L93 Difference]: Finished difference Result 491 states and 1239 transitions. [2022-01-18 15:42:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-18 15:42:30,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:30,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:30,833 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:42:30,833 INFO L226 Difference]: Without dead ends: 487 [2022-01-18 15:42:30,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 15:42:30,834 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:30,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 96 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 427 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-01-18 15:42:30,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2022-01-18 15:42:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 404. [2022-01-18 15:42:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.632754342431762) internal successors, (1061), 403 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:30,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1061 transitions. [2022-01-18 15:42:30,838 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1061 transitions. Word has length 19 [2022-01-18 15:42:30,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:30,838 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1061 transitions. [2022-01-18 15:42:30,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:30,838 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1061 transitions. [2022-01-18 15:42:30,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:30,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:30,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:30,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (573)] Ended with exit code 0 [2022-01-18 15:42:31,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,573 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:31,039 INFO L402 AbstractCegarLoop]: === Iteration 591 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:31,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:31,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1961671174, now seen corresponding path program 570 times [2022-01-18 15:42:31,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061676025] [2022-01-18 15:42:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:31,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061676025] [2022-01-18 15:42:31,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061676025] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582472778] [2022-01-18 15:42:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:31,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:31,123 INFO L229 MonitoredProcess]: Starting monitored process 574 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:31,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Waiting until timeout for monitored process [2022-01-18 15:42:31,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:31,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:31,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:31,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:31,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:31,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:31,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:31,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:31,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:31,433 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:31,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:31,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:31,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582472778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:31,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:31,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:31,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224868902] [2022-01-18 15:42:31,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:31,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:31,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:31,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:31,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:31,464 INFO L87 Difference]: Start difference. First operand 404 states and 1061 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:31,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:31,723 INFO L93 Difference]: Finished difference Result 445 states and 1137 transitions. [2022-01-18 15:42:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:42:31,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:31,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:31,724 INFO L225 Difference]: With dead ends: 445 [2022-01-18 15:42:31,724 INFO L226 Difference]: Without dead ends: 445 [2022-01-18 15:42:31,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:42:31,724 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:31,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 349 Invalid, 0 Unknown, 127 Unchecked, 0.1s Time] [2022-01-18 15:42:31,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-18 15:42:31,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 402. [2022-01-18 15:42:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.638403990024938) internal successors, (1058), 401 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:31,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1058 transitions. [2022-01-18 15:42:31,728 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1058 transitions. Word has length 19 [2022-01-18 15:42:31,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:31,728 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1058 transitions. [2022-01-18 15:42:31,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:31,728 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1058 transitions. [2022-01-18 15:42:31,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:31,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:31,729 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:31,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (574)] Ended with exit code 0 [2022-01-18 15:42:31,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable590,574 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:31,929 INFO L402 AbstractCegarLoop]: === Iteration 592 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:31,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:31,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1178449540, now seen corresponding path program 571 times [2022-01-18 15:42:31,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:31,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538258491] [2022-01-18 15:42:31,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:31,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:32,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538258491] [2022-01-18 15:42:32,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538258491] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:32,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786457700] [2022-01-18 15:42:32,013 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:32,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:32,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:32,014 INFO L229 MonitoredProcess]: Starting monitored process 575 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:32,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Waiting until timeout for monitored process [2022-01-18 15:42:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:32,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:32,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:32,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:32,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:32,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:32,363 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:32,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:32,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786457700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:32,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:32,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:32,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29984013] [2022-01-18 15:42:32,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:32,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:32,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:32,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:32,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:32,394 INFO L87 Difference]: Start difference. First operand 402 states and 1058 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:32,595 INFO L93 Difference]: Finished difference Result 529 states and 1298 transitions. [2022-01-18 15:42:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:32,595 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:32,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:32,596 INFO L225 Difference]: With dead ends: 529 [2022-01-18 15:42:32,596 INFO L226 Difference]: Without dead ends: 529 [2022-01-18 15:42:32,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:32,596 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:32,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 220 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 386 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-18 15:42:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2022-01-18 15:42:32,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 410. [2022-01-18 15:42:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.645476772616137) internal successors, (1082), 409 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1082 transitions. [2022-01-18 15:42:32,600 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1082 transitions. Word has length 19 [2022-01-18 15:42:32,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:32,600 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 1082 transitions. [2022-01-18 15:42:32,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1082 transitions. [2022-01-18 15:42:32,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:32,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:32,601 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:32,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (575)] Ended with exit code 0 [2022-01-18 15:42:32,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,575 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:32,801 INFO L402 AbstractCegarLoop]: === Iteration 593 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:32,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1350344784, now seen corresponding path program 572 times [2022-01-18 15:42:32,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:32,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202492781] [2022-01-18 15:42:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:32,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:32,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202492781] [2022-01-18 15:42:32,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202492781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005910462] [2022-01-18 15:42:32,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:32,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:32,878 INFO L229 MonitoredProcess]: Starting monitored process 576 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:32,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Waiting until timeout for monitored process [2022-01-18 15:42:32,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:32,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:32,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:32,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:33,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:33,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:33,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:33,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:33,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:33,200 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:33,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:33,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005910462] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:33,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:33,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:33,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904881319] [2022-01-18 15:42:33,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:33,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:33,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:33,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:33,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:33,228 INFO L87 Difference]: Start difference. First operand 410 states and 1082 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:33,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:33,400 INFO L93 Difference]: Finished difference Result 534 states and 1303 transitions. [2022-01-18 15:42:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:33,400 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:33,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:33,401 INFO L225 Difference]: With dead ends: 534 [2022-01-18 15:42:33,401 INFO L226 Difference]: Without dead ends: 534 [2022-01-18 15:42:33,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:33,401 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:33,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 238 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 391 Invalid, 0 Unknown, 93 Unchecked, 0.1s Time] [2022-01-18 15:42:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 534 states. [2022-01-18 15:42:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 534 to 404. [2022-01-18 15:42:33,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.642679900744417) internal successors, (1065), 403 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:33,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1065 transitions. [2022-01-18 15:42:33,405 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1065 transitions. Word has length 19 [2022-01-18 15:42:33,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:33,405 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1065 transitions. [2022-01-18 15:42:33,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:33,405 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1065 transitions. [2022-01-18 15:42:33,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:33,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:33,406 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:33,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (576)] Ended with exit code 0 [2022-01-18 15:42:33,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable592 [2022-01-18 15:42:33,606 INFO L402 AbstractCegarLoop]: === Iteration 594 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:33,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:33,606 INFO L85 PathProgramCache]: Analyzing trace with hash -383351878, now seen corresponding path program 573 times [2022-01-18 15:42:33,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:33,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949382505] [2022-01-18 15:42:33,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:33,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949382505] [2022-01-18 15:42:33,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949382505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:33,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160214861] [2022-01-18 15:42:33,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:33,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:33,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:33,683 INFO L229 MonitoredProcess]: Starting monitored process 577 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:33,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Waiting until timeout for monitored process [2022-01-18 15:42:33,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:42:33,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:33,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:33,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:33,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2022-01-18 15:42:33,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:33,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2022-01-18 15:42:33,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:33,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:34,014 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:34,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:34,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:34,046 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160214861] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:34,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:34,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:34,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923347900] [2022-01-18 15:42:34,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:34,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:34,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:34,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:34,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:34,046 INFO L87 Difference]: Start difference. First operand 404 states and 1065 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:34,319 INFO L93 Difference]: Finished difference Result 491 states and 1201 transitions. [2022-01-18 15:42:34,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:42:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:34,320 INFO L225 Difference]: With dead ends: 491 [2022-01-18 15:42:34,320 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:42:34,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:42:34,320 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:34,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 318 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 586 Invalid, 0 Unknown, 86 Unchecked, 0.2s Time] [2022-01-18 15:42:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:42:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 404. [2022-01-18 15:42:34,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.640198511166253) internal successors, (1064), 403 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1064 transitions. [2022-01-18 15:42:34,324 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1064 transitions. Word has length 19 [2022-01-18 15:42:34,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:34,324 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1064 transitions. [2022-01-18 15:42:34,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:34,325 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1064 transitions. [2022-01-18 15:42:34,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:34,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:34,325 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:34,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (577)] Ended with exit code 0 [2022-01-18 15:42:34,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,577 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:34,525 INFO L402 AbstractCegarLoop]: === Iteration 595 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:34,526 INFO L85 PathProgramCache]: Analyzing trace with hash -920082124, now seen corresponding path program 574 times [2022-01-18 15:42:34,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:34,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584654273] [2022-01-18 15:42:34,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:34,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584654273] [2022-01-18 15:42:34,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584654273] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:34,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850688241] [2022-01-18 15:42:34,597 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:34,597 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:34,598 INFO L229 MonitoredProcess]: Starting monitored process 578 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:34,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Waiting until timeout for monitored process [2022-01-18 15:42:34,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:34,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:34,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:34,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:34,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:34,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:34,872 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:34,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:34,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:34,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:34,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850688241] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:34,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:34,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:34,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992506281] [2022-01-18 15:42:34,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:34,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:34,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:34,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:34,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:34,901 INFO L87 Difference]: Start difference. First operand 404 states and 1064 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:35,123 INFO L93 Difference]: Finished difference Result 513 states and 1254 transitions. [2022-01-18 15:42:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:35,124 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:35,124 INFO L225 Difference]: With dead ends: 513 [2022-01-18 15:42:35,124 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:42:35,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:42:35,124 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:35,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 251 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 455 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-01-18 15:42:35,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:42:35,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 405. [2022-01-18 15:42:35,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.6435643564356437) internal successors, (1068), 404 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1068 transitions. [2022-01-18 15:42:35,129 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1068 transitions. Word has length 19 [2022-01-18 15:42:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:35,129 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1068 transitions. [2022-01-18 15:42:35,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1068 transitions. [2022-01-18 15:42:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:35,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:35,129 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:35,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (578)] Ended with exit code 0 [2022-01-18 15:42:35,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,578 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:35,330 INFO L402 AbstractCegarLoop]: === Iteration 596 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:35,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:35,330 INFO L85 PathProgramCache]: Analyzing trace with hash -631490, now seen corresponding path program 575 times [2022-01-18 15:42:35,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:35,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618797002] [2022-01-18 15:42:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:35,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:35,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:35,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618797002] [2022-01-18 15:42:35,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618797002] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946591745] [2022-01-18 15:42:35,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:35,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:35,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:35,409 INFO L229 MonitoredProcess]: Starting monitored process 579 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:35,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Waiting until timeout for monitored process [2022-01-18 15:42:35,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:42:35,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:35,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:35,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:35,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:35,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:35,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:35,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:35,698 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:35,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:35,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:35,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:35,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946591745] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:35,733 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:35,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:35,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897322323] [2022-01-18 15:42:35,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:35,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:35,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:35,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:35,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:35,734 INFO L87 Difference]: Start difference. First operand 405 states and 1068 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:35,994 INFO L93 Difference]: Finished difference Result 505 states and 1234 transitions. [2022-01-18 15:42:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:42:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:35,995 INFO L225 Difference]: With dead ends: 505 [2022-01-18 15:42:35,995 INFO L226 Difference]: Without dead ends: 499 [2022-01-18 15:42:35,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:42:35,995 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:35,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 230 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 523 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-01-18 15:42:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-01-18 15:42:35,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 406. [2022-01-18 15:42:35,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.6444444444444444) internal successors, (1071), 405 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1071 transitions. [2022-01-18 15:42:35,999 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1071 transitions. Word has length 19 [2022-01-18 15:42:36,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:36,000 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1071 transitions. [2022-01-18 15:42:36,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1071 transitions. [2022-01-18 15:42:36,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:36,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:36,000 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:36,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (579)] Ended with exit code 0 [2022-01-18 15:42:36,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2022-01-18 15:42:36,216 INFO L402 AbstractCegarLoop]: === Iteration 597 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:36,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:36,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1506997726, now seen corresponding path program 576 times [2022-01-18 15:42:36,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:36,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350284882] [2022-01-18 15:42:36,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:36,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:36,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:36,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350284882] [2022-01-18 15:42:36,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350284882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704440164] [2022-01-18 15:42:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:36,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:36,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:36,287 INFO L229 MonitoredProcess]: Starting monitored process 580 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:36,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Waiting until timeout for monitored process [2022-01-18 15:42:36,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:36,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:36,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:36,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:36,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:36,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:36,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:36,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:36,562 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:36,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:36,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:36,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704440164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:36,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:36,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:36,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609653459] [2022-01-18 15:42:36,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:36,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:36,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:36,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:36,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:36,591 INFO L87 Difference]: Start difference. First operand 406 states and 1071 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:36,952 INFO L93 Difference]: Finished difference Result 580 states and 1371 transitions. [2022-01-18 15:42:36,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-18 15:42:36,953 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:36,953 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:42:36,953 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:42:36,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:42:36,954 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 86 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:36,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 248 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 551 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-01-18 15:42:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:42:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 406. [2022-01-18 15:42:36,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.6419753086419755) internal successors, (1070), 405 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1070 transitions. [2022-01-18 15:42:36,958 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1070 transitions. Word has length 19 [2022-01-18 15:42:36,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:36,958 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1070 transitions. [2022-01-18 15:42:36,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:36,958 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1070 transitions. [2022-01-18 15:42:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:36,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:36,959 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:36,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (580)] Ended with exit code 0 [2022-01-18 15:42:37,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2022-01-18 15:42:37,159 INFO L402 AbstractCegarLoop]: === Iteration 598 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:37,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:37,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1120092986, now seen corresponding path program 577 times [2022-01-18 15:42:37,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:37,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315226781] [2022-01-18 15:42:37,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:37,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:37,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315226781] [2022-01-18 15:42:37,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315226781] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040725065] [2022-01-18 15:42:37,231 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:37,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:37,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:37,232 INFO L229 MonitoredProcess]: Starting monitored process 581 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:37,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Waiting until timeout for monitored process [2022-01-18 15:42:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:37,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:37,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:37,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:37,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:37,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:37,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:37,489 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:37,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:37,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:37,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040725065] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:37,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:37,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:37,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240877818] [2022-01-18 15:42:37,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:37,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:37,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:37,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:37,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:37,521 INFO L87 Difference]: Start difference. First operand 406 states and 1070 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:37,701 INFO L93 Difference]: Finished difference Result 485 states and 1202 transitions. [2022-01-18 15:42:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:37,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:37,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:37,702 INFO L225 Difference]: With dead ends: 485 [2022-01-18 15:42:37,702 INFO L226 Difference]: Without dead ends: 485 [2022-01-18 15:42:37,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:37,703 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:37,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 169 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-01-18 15:42:37,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-01-18 15:42:37,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 403. [2022-01-18 15:42:37,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.6417910447761193) internal successors, (1062), 402 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1062 transitions. [2022-01-18 15:42:37,707 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1062 transitions. Word has length 19 [2022-01-18 15:42:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:37,707 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 1062 transitions. [2022-01-18 15:42:37,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1062 transitions. [2022-01-18 15:42:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:37,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:37,708 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:37,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (581)] Ended with exit code 0 [2022-01-18 15:42:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 581 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2022-01-18 15:42:37,923 INFO L402 AbstractCegarLoop]: === Iteration 599 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:37,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:37,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1932774656, now seen corresponding path program 578 times [2022-01-18 15:42:37,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:37,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841215628] [2022-01-18 15:42:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:37,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:37,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:37,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841215628] [2022-01-18 15:42:37,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841215628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:37,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451518604] [2022-01-18 15:42:37,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:37,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:37,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:37,996 INFO L229 MonitoredProcess]: Starting monitored process 582 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:37,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Waiting until timeout for monitored process [2022-01-18 15:42:38,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:38,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:38,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:38,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:38,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:38,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:38,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:38,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:38,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:38,275 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:38,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:38,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:38,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451518604] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:38,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:38,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:38,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176328445] [2022-01-18 15:42:38,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:38,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:38,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:38,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:38,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:38,307 INFO L87 Difference]: Start difference. First operand 403 states and 1062 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:38,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:38,617 INFO L93 Difference]: Finished difference Result 530 states and 1271 transitions. [2022-01-18 15:42:38,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 15:42:38,618 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:38,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:38,618 INFO L225 Difference]: With dead ends: 530 [2022-01-18 15:42:38,618 INFO L226 Difference]: Without dead ends: 524 [2022-01-18 15:42:38,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 15:42:38,618 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 93 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:38,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 189 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-01-18 15:42:38,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 401. [2022-01-18 15:42:38,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.635) internal successors, (1054), 400 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1054 transitions. [2022-01-18 15:42:38,623 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1054 transitions. Word has length 19 [2022-01-18 15:42:38,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:38,623 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1054 transitions. [2022-01-18 15:42:38,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:38,623 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1054 transitions. [2022-01-18 15:42:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:38,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:38,623 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:38,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (582)] Ended with exit code 0 [2022-01-18 15:42:38,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2022-01-18 15:42:38,824 INFO L402 AbstractCegarLoop]: === Iteration 600 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:38,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:38,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1013324022, now seen corresponding path program 579 times [2022-01-18 15:42:38,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:38,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692725549] [2022-01-18 15:42:38,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:38,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:38,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:38,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692725549] [2022-01-18 15:42:38,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692725549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:38,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322436409] [2022-01-18 15:42:38,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:38,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:38,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:38,896 INFO L229 MonitoredProcess]: Starting monitored process 583 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:38,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Waiting until timeout for monitored process [2022-01-18 15:42:38,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:42:38,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:38,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:38,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:39,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:39,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:39,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:39,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:39,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:39,158 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:39,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:39,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:39,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:39,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322436409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:39,188 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:39,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:39,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69510198] [2022-01-18 15:42:39,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:39,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:39,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:39,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:39,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:39,189 INFO L87 Difference]: Start difference. First operand 401 states and 1054 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:40,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:40,443 INFO L93 Difference]: Finished difference Result 791 states and 1727 transitions. [2022-01-18 15:42:40,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 15:42:40,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:40,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:40,444 INFO L225 Difference]: With dead ends: 791 [2022-01-18 15:42:40,444 INFO L226 Difference]: Without dead ends: 785 [2022-01-18 15:42:40,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=553, Invalid=4277, Unknown=0, NotChecked=0, Total=4830 [2022-01-18 15:42:40,445 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 261 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:40,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 224 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2022-01-18 15:42:40,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 416. [2022-01-18 15:42:40,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.674698795180723) internal successors, (1110), 415 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:40,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1110 transitions. [2022-01-18 15:42:40,450 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1110 transitions. Word has length 19 [2022-01-18 15:42:40,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:40,450 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1110 transitions. [2022-01-18 15:42:40,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1110 transitions. [2022-01-18 15:42:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:40,451 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:40,451 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:40,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (583)] Ended with exit code 0 [2022-01-18 15:42:40,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2022-01-18 15:42:40,651 INFO L402 AbstractCegarLoop]: === Iteration 601 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1775277038, now seen corresponding path program 580 times [2022-01-18 15:42:40,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:40,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699409345] [2022-01-18 15:42:40,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:40,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:40,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699409345] [2022-01-18 15:42:40,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699409345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:40,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224644009] [2022-01-18 15:42:40,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:40,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:40,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:40,723 INFO L229 MonitoredProcess]: Starting monitored process 584 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:40,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Waiting until timeout for monitored process [2022-01-18 15:42:40,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:40,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:40,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:40,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:40,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:40,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:40,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:40,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:40,991 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:40,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:40,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:41,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:41,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224644009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:41,022 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:41,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:41,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691084469] [2022-01-18 15:42:41,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:41,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:41,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:41,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:41,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:41,023 INFO L87 Difference]: Start difference. First operand 416 states and 1110 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:41,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:41,553 INFO L93 Difference]: Finished difference Result 580 states and 1375 transitions. [2022-01-18 15:42:41,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-18 15:42:41,553 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:41,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:41,553 INFO L225 Difference]: With dead ends: 580 [2022-01-18 15:42:41,553 INFO L226 Difference]: Without dead ends: 576 [2022-01-18 15:42:41,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:42:41,554 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 124 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:41,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 266 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:41,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-18 15:42:41,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 416. [2022-01-18 15:42:41,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.672289156626506) internal successors, (1109), 415 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:41,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1109 transitions. [2022-01-18 15:42:41,558 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1109 transitions. Word has length 19 [2022-01-18 15:42:41,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:41,558 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 1109 transitions. [2022-01-18 15:42:41,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:41,558 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1109 transitions. [2022-01-18 15:42:41,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:41,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:41,559 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:41,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (584)] Ended with exit code 0 [2022-01-18 15:42:41,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2022-01-18 15:42:41,759 INFO L402 AbstractCegarLoop]: === Iteration 602 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:41,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:41,759 INFO L85 PathProgramCache]: Analyzing trace with hash 107400454, now seen corresponding path program 581 times [2022-01-18 15:42:41,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:41,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236797445] [2022-01-18 15:42:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:41,760 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:41,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:41,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236797445] [2022-01-18 15:42:41,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236797445] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:41,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539021982] [2022-01-18 15:42:41,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:41,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:41,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:41,837 INFO L229 MonitoredProcess]: Starting monitored process 585 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:41,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Waiting until timeout for monitored process [2022-01-18 15:42:41,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:42:41,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:41,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:41,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:41,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:41,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:41,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:41,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:42,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:42,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:42,085 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:42,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:42,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:42,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539021982] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:42,113 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:42,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:42,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74191025] [2022-01-18 15:42:42,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:42,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:42,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:42,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:42,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:42,114 INFO L87 Difference]: Start difference. First operand 416 states and 1109 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:42,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:42,875 INFO L93 Difference]: Finished difference Result 665 states and 1536 transitions. [2022-01-18 15:42:42,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-18 15:42:42,875 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:42,876 INFO L225 Difference]: With dead ends: 665 [2022-01-18 15:42:42,876 INFO L226 Difference]: Without dead ends: 665 [2022-01-18 15:42:42,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:42:42,877 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:42,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 303 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-18 15:42:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 409. [2022-01-18 15:42:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.6544117647058822) internal successors, (1083), 408 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1083 transitions. [2022-01-18 15:42:42,882 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1083 transitions. Word has length 19 [2022-01-18 15:42:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:42,882 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1083 transitions. [2022-01-18 15:42:42,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:42,882 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1083 transitions. [2022-01-18 15:42:42,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:42,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:42,883 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:42,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (585)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:43,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2022-01-18 15:42:43,083 INFO L402 AbstractCegarLoop]: === Iteration 603 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:43,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:43,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1240047236, now seen corresponding path program 582 times [2022-01-18 15:42:43,083 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:43,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880779520] [2022-01-18 15:42:43,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:43,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:43,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:43,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:43,166 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:43,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880779520] [2022-01-18 15:42:43,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880779520] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:43,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974703103] [2022-01-18 15:42:43,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:43,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:43,167 INFO L229 MonitoredProcess]: Starting monitored process 586 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:43,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Waiting until timeout for monitored process [2022-01-18 15:42:43,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 15:42:43,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:43,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:43,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:43,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:42:43,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:43,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:42:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:43,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:43,480 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:43,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 35 [2022-01-18 15:42:43,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:43,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:43,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974703103] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:43,516 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:43,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:43,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692175117] [2022-01-18 15:42:43,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:43,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:43,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:43,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:43,517 INFO L87 Difference]: Start difference. First operand 409 states and 1083 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:43,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:43,975 INFO L93 Difference]: Finished difference Result 483 states and 1203 transitions. [2022-01-18 15:42:43,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:42:43,975 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:43,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:43,976 INFO L225 Difference]: With dead ends: 483 [2022-01-18 15:42:43,976 INFO L226 Difference]: Without dead ends: 475 [2022-01-18 15:42:43,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:42:43,976 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:43,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 201 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:43,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-18 15:42:43,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 409. [2022-01-18 15:42:43,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.6519607843137254) internal successors, (1082), 408 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1082 transitions. [2022-01-18 15:42:43,981 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1082 transitions. Word has length 19 [2022-01-18 15:42:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:43,981 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 1082 transitions. [2022-01-18 15:42:43,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1082 transitions. [2022-01-18 15:42:43,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:43,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:43,981 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:44,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (586)] Ended with exit code 0 [2022-01-18 15:42:44,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable602 [2022-01-18 15:42:44,182 INFO L402 AbstractCegarLoop]: === Iteration 604 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:44,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1183111610, now seen corresponding path program 583 times [2022-01-18 15:42:44,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:44,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102074548] [2022-01-18 15:42:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:44,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:44,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102074548] [2022-01-18 15:42:44,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102074548] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719242049] [2022-01-18 15:42:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:44,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:44,260 INFO L229 MonitoredProcess]: Starting monitored process 587 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:44,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Waiting until timeout for monitored process [2022-01-18 15:42:44,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:44,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:44,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:44,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:44,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:44,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:44,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:44,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:44,512 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-18 15:42:44,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 32 [2022-01-18 15:42:44,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-01-18 15:42:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:44,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719242049] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:44,540 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:44,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 17 [2022-01-18 15:42:44,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306819790] [2022-01-18 15:42:44,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:44,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 15:42:44,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 15:42:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2022-01-18 15:42:44,541 INFO L87 Difference]: Start difference. First operand 409 states and 1082 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:44,914 INFO L93 Difference]: Finished difference Result 571 states and 1366 transitions. [2022-01-18 15:42:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:42:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:44,915 INFO L225 Difference]: With dead ends: 571 [2022-01-18 15:42:44,915 INFO L226 Difference]: Without dead ends: 571 [2022-01-18 15:42:44,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:44,915 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 103 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:44,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 175 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-01-18 15:42:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 405. [2022-01-18 15:42:44,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.636138613861386) internal successors, (1065), 404 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1065 transitions. [2022-01-18 15:42:44,919 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1065 transitions. Word has length 19 [2022-01-18 15:42:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:44,919 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1065 transitions. [2022-01-18 15:42:44,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:44,919 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1065 transitions. [2022-01-18 15:42:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:44,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:44,920 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:44,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (587)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:45,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,587 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:45,120 INFO L402 AbstractCegarLoop]: === Iteration 605 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:45,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:45,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1033495220, now seen corresponding path program 584 times [2022-01-18 15:42:45,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:45,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001871632] [2022-01-18 15:42:45,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:45,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:45,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:45,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001871632] [2022-01-18 15:42:45,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001871632] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:45,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418762725] [2022-01-18 15:42:45,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:45,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:45,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:45,203 INFO L229 MonitoredProcess]: Starting monitored process 588 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:45,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Waiting until timeout for monitored process [2022-01-18 15:42:45,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:45,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:45,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:45,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:45,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:45,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:45,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:45,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:45,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:45,511 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:45,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:45,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:45,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418762725] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:45,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:45,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:45,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313227698] [2022-01-18 15:42:45,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:45,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:45,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:45,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:45,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:45,542 INFO L87 Difference]: Start difference. First operand 405 states and 1065 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:45,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:45,994 INFO L93 Difference]: Finished difference Result 519 states and 1255 transitions. [2022-01-18 15:42:45,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-18 15:42:45,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:45,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:45,995 INFO L225 Difference]: With dead ends: 519 [2022-01-18 15:42:45,995 INFO L226 Difference]: Without dead ends: 513 [2022-01-18 15:42:45,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2022-01-18 15:42:45,995 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 112 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:45,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 224 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:45,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-18 15:42:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 404. [2022-01-18 15:42:45,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.632754342431762) internal successors, (1061), 403 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:45,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1061 transitions. [2022-01-18 15:42:45,999 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1061 transitions. Word has length 19 [2022-01-18 15:42:45,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:45,999 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1061 transitions. [2022-01-18 15:42:45,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:45,999 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1061 transitions. [2022-01-18 15:42:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:46,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:46,000 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:46,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (588)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:46,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable604,588 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:46,200 INFO L402 AbstractCegarLoop]: === Iteration 606 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1952945854, now seen corresponding path program 585 times [2022-01-18 15:42:46,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:46,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508871517] [2022-01-18 15:42:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:46,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:46,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:46,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:46,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508871517] [2022-01-18 15:42:46,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508871517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:46,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232675158] [2022-01-18 15:42:46,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:46,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:46,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:46,288 INFO L229 MonitoredProcess]: Starting monitored process 589 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:46,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Waiting until timeout for monitored process [2022-01-18 15:42:46,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-18 15:42:46,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:46,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:46,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:46,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:46,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:46,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:46,494 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:46,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:46,579 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:46,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:46,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:46,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:46,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232675158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:46,606 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:46,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:46,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788083993] [2022-01-18 15:42:46,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:46,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:46,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:46,606 INFO L87 Difference]: Start difference. First operand 404 states and 1061 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:48,413 INFO L93 Difference]: Finished difference Result 725 states and 1630 transitions. [2022-01-18 15:42:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-18 15:42:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:48,414 INFO L225 Difference]: With dead ends: 725 [2022-01-18 15:42:48,414 INFO L226 Difference]: Without dead ends: 719 [2022-01-18 15:42:48,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=634, Invalid=3656, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 15:42:48,414 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 236 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:48,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 212 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:42:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2022-01-18 15:42:48,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 417. [2022-01-18 15:42:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.6586538461538463) internal successors, (1106), 416 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1106 transitions. [2022-01-18 15:42:48,420 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1106 transitions. Word has length 19 [2022-01-18 15:42:48,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:48,420 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1106 transitions. [2022-01-18 15:42:48,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1106 transitions. [2022-01-18 15:42:48,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:48,420 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:48,420 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:48,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (589)] Ended with exit code 0 [2022-01-18 15:42:48,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,589 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:48,621 INFO L402 AbstractCegarLoop]: === Iteration 607 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:48,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:48,621 INFO L85 PathProgramCache]: Analyzing trace with hash 446579618, now seen corresponding path program 586 times [2022-01-18 15:42:48,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:48,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436277146] [2022-01-18 15:42:48,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:48,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:48,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436277146] [2022-01-18 15:42:48,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436277146] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:48,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318902194] [2022-01-18 15:42:48,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:48,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:48,705 INFO L229 MonitoredProcess]: Starting monitored process 590 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:48,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Waiting until timeout for monitored process [2022-01-18 15:42:48,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:48,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:48,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:48,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:48,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:48,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:48,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:48,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:49,012 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:49,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:49,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:49,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318902194] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:49,041 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:49,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:49,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859336186] [2022-01-18 15:42:49,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:49,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:49,042 INFO L87 Difference]: Start difference. First operand 417 states and 1106 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:49,615 INFO L93 Difference]: Finished difference Result 519 states and 1269 transitions. [2022-01-18 15:42:49,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-18 15:42:49,615 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:49,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:49,615 INFO L225 Difference]: With dead ends: 519 [2022-01-18 15:42:49,615 INFO L226 Difference]: Without dead ends: 515 [2022-01-18 15:42:49,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=161, Invalid=1099, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 15:42:49,616 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 117 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:49,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 196 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:49,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-18 15:42:49,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 417. [2022-01-18 15:42:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.65625) internal successors, (1105), 416 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1105 transitions. [2022-01-18 15:42:49,620 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1105 transitions. Word has length 19 [2022-01-18 15:42:49,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:49,620 INFO L470 AbstractCegarLoop]: Abstraction has 417 states and 1105 transitions. [2022-01-18 15:42:49,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:49,620 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1105 transitions. [2022-01-18 15:42:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:49,621 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:49,621 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:49,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (590)] Ended with exit code 0 [2022-01-18 15:42:49,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2022-01-18 15:42:49,821 INFO L402 AbstractCegarLoop]: === Iteration 608 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:49,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1221296966, now seen corresponding path program 587 times [2022-01-18 15:42:49,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:49,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158233861] [2022-01-18 15:42:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:49,822 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:49,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:49,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:49,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158233861] [2022-01-18 15:42:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158233861] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642367391] [2022-01-18 15:42:49,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:49,902 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:49,903 INFO L229 MonitoredProcess]: Starting monitored process 591 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:49,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Waiting until timeout for monitored process [2022-01-18 15:42:49,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 15:42:49,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:49,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:49,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:50,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:50,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:50,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:50,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:50,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:50,174 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:50,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:50,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:50,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642367391] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:50,200 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:50,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:50,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263603244] [2022-01-18 15:42:50,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:50,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:50,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:50,201 INFO L87 Difference]: Start difference. First operand 417 states and 1105 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:51,151 INFO L93 Difference]: Finished difference Result 652 states and 1510 transitions. [2022-01-18 15:42:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-18 15:42:51,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:51,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:51,152 INFO L225 Difference]: With dead ends: 652 [2022-01-18 15:42:51,152 INFO L226 Difference]: Without dead ends: 648 [2022-01-18 15:42:51,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 15:42:51,153 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 153 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:51,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 175 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:51,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-18 15:42:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 405. [2022-01-18 15:42:51,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.636138613861386) internal successors, (1065), 404 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1065 transitions. [2022-01-18 15:42:51,157 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1065 transitions. Word has length 19 [2022-01-18 15:42:51,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:51,157 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1065 transitions. [2022-01-18 15:42:51,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1065 transitions. [2022-01-18 15:42:51,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:51,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:51,158 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:51,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (591)] Ended with exit code 0 [2022-01-18 15:42:51,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,591 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:51,358 INFO L402 AbstractCegarLoop]: === Iteration 609 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:51,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:51,358 INFO L85 PathProgramCache]: Analyzing trace with hash -88650184, now seen corresponding path program 588 times [2022-01-18 15:42:51,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:51,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652432764] [2022-01-18 15:42:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:51,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:51,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:51,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652432764] [2022-01-18 15:42:51,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652432764] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:51,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424135127] [2022-01-18 15:42:51,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:51,444 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:51,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:51,444 INFO L229 MonitoredProcess]: Starting monitored process 592 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:51,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Waiting until timeout for monitored process [2022-01-18 15:42:51,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:51,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:51,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:42:51,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:51,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:42:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:51,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:51,766 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:51,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:51,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:51,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:51,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424135127] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:51,797 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:51,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:51,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871470766] [2022-01-18 15:42:51,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:51,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:51,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:51,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:51,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:51,798 INFO L87 Difference]: Start difference. First operand 405 states and 1065 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:52,255 INFO L93 Difference]: Finished difference Result 460 states and 1148 transitions. [2022-01-18 15:42:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:42:52,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:52,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:52,255 INFO L225 Difference]: With dead ends: 460 [2022-01-18 15:42:52,255 INFO L226 Difference]: Without dead ends: 452 [2022-01-18 15:42:52,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-18 15:42:52,256 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:52,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 127 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:42:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-18 15:42:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 405. [2022-01-18 15:42:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.633663366336634) internal successors, (1064), 404 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1064 transitions. [2022-01-18 15:42:52,259 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1064 transitions. Word has length 19 [2022-01-18 15:42:52,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:52,259 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1064 transitions. [2022-01-18 15:42:52,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:52,260 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1064 transitions. [2022-01-18 15:42:52,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:52,260 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:52,260 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:52,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (592)] Ended with exit code 0 [2022-01-18 15:42:52,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,592 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:52,460 INFO L402 AbstractCegarLoop]: === Iteration 610 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:52,461 INFO L85 PathProgramCache]: Analyzing trace with hash -145585810, now seen corresponding path program 589 times [2022-01-18 15:42:52,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:52,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520895864] [2022-01-18 15:42:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:52,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:52,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:52,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520895864] [2022-01-18 15:42:52,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520895864] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681776010] [2022-01-18 15:42:52,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:52,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:52,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:52,548 INFO L229 MonitoredProcess]: Starting monitored process 593 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:52,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Waiting until timeout for monitored process [2022-01-18 15:42:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:52,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:52,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:52,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:52,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:52,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:52,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:52,828 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:52,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:52,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:52,854 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:52,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681776010] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:52,854 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:52,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:52,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727585455] [2022-01-18 15:42:52,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:52,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:52,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:52,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:52,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:52,854 INFO L87 Difference]: Start difference. First operand 405 states and 1064 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:53,690 INFO L93 Difference]: Finished difference Result 540 states and 1311 transitions. [2022-01-18 15:42:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 15:42:53,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:53,691 INFO L225 Difference]: With dead ends: 540 [2022-01-18 15:42:53,691 INFO L226 Difference]: Without dead ends: 536 [2022-01-18 15:42:53,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 15:42:53,692 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 74 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:53,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 123 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:53,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-18 15:42:53,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 398. [2022-01-18 15:42:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.6221662468513856) internal successors, (1041), 397 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1041 transitions. [2022-01-18 15:42:53,696 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1041 transitions. Word has length 19 [2022-01-18 15:42:53,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:53,696 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1041 transitions. [2022-01-18 15:42:53,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:53,696 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1041 transitions. [2022-01-18 15:42:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:53,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:53,696 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:53,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (593)] Ended with exit code 0 [2022-01-18 15:42:53,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable609 [2022-01-18 15:42:53,897 INFO L402 AbstractCegarLoop]: === Iteration 611 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:53,897 INFO L85 PathProgramCache]: Analyzing trace with hash 499095138, now seen corresponding path program 590 times [2022-01-18 15:42:53,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:53,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105169076] [2022-01-18 15:42:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:53,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:53,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:53,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:53,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105169076] [2022-01-18 15:42:53,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105169076] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:53,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944728171] [2022-01-18 15:42:53,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:42:53,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:53,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:53,986 INFO L229 MonitoredProcess]: Starting monitored process 594 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:53,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Waiting until timeout for monitored process [2022-01-18 15:42:54,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:42:54,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:54,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:54,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:54,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:42:54,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:54,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:42:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:54,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:54,304 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:54,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:54,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:54,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:54,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944728171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:54,333 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:54,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:54,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919175935] [2022-01-18 15:42:54,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:54,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:54,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:54,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:54,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:54,333 INFO L87 Difference]: Start difference. First operand 398 states and 1041 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:54,647 INFO L93 Difference]: Finished difference Result 419 states and 1074 transitions. [2022-01-18 15:42:54,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:54,648 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:54,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:54,648 INFO L225 Difference]: With dead ends: 419 [2022-01-18 15:42:54,648 INFO L226 Difference]: Without dead ends: 407 [2022-01-18 15:42:54,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-01-18 15:42:54,649 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:54,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 90 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:42:54,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-01-18 15:42:54,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 398. [2022-01-18 15:42:54,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.619647355163728) internal successors, (1040), 397 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1040 transitions. [2022-01-18 15:42:54,652 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1040 transitions. Word has length 19 [2022-01-18 15:42:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:54,652 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1040 transitions. [2022-01-18 15:42:54,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1040 transitions. [2022-01-18 15:42:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:54,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:54,653 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:54,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (594)] Ended with exit code 0 [2022-01-18 15:42:54,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,594 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,853 INFO L402 AbstractCegarLoop]: === Iteration 612 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:54,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1158278342, now seen corresponding path program 591 times [2022-01-18 15:42:54,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:54,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506204260] [2022-01-18 15:42:54,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:54,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:54,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:54,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506204260] [2022-01-18 15:42:54,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506204260] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:54,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006597603] [2022-01-18 15:42:54,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:42:54,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:54,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:54,944 INFO L229 MonitoredProcess]: Starting monitored process 595 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:54,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Waiting until timeout for monitored process [2022-01-18 15:42:54,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:42:54,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:54,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:54,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:55,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:55,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:42:55,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:55,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:42:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:55,240 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:55,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:55,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 15:42:55,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006597603] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:55,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:55,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-01-18 15:42:55,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253509890] [2022-01-18 15:42:55,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:55,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 15:42:55,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 15:42:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-01-18 15:42:55,266 INFO L87 Difference]: Start difference. First operand 398 states and 1040 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:55,546 INFO L93 Difference]: Finished difference Result 467 states and 1170 transitions. [2022-01-18 15:42:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 15:42:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:55,547 INFO L225 Difference]: With dead ends: 467 [2022-01-18 15:42:55,547 INFO L226 Difference]: Without dead ends: 467 [2022-01-18 15:42:55,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:42:55,547 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:55,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 116 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:55,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-18 15:42:55,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 391. [2022-01-18 15:42:55,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.6102564102564103) internal successors, (1018), 390 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:55,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1018 transitions. [2022-01-18 15:42:55,551 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1018 transitions. Word has length 19 [2022-01-18 15:42:55,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:55,551 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1018 transitions. [2022-01-18 15:42:55,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:55,551 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1018 transitions. [2022-01-18 15:42:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:55,552 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:55,552 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:55,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (595)] Ended with exit code 0 [2022-01-18 15:42:55,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,595 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,752 INFO L402 AbstractCegarLoop]: === Iteration 613 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:55,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1501419136, now seen corresponding path program 592 times [2022-01-18 15:42:55,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:55,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062927090] [2022-01-18 15:42:55,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:55,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:55,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:55,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:55,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062927090] [2022-01-18 15:42:55,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062927090] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:55,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822219906] [2022-01-18 15:42:55,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:42:55,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:55,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:55,849 INFO L229 MonitoredProcess]: Starting monitored process 596 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:55,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Waiting until timeout for monitored process [2022-01-18 15:42:55,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:42:55,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:55,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:55,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:56,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:56,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:56,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:56,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:56,186 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:56,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:56,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822219906] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:56,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:56,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:56,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654048791] [2022-01-18 15:42:56,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:56,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:56,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:56,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:56,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:56,214 INFO L87 Difference]: Start difference. First operand 391 states and 1018 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:56,569 INFO L93 Difference]: Finished difference Result 474 states and 1170 transitions. [2022-01-18 15:42:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:42:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:56,570 INFO L225 Difference]: With dead ends: 474 [2022-01-18 15:42:56,570 INFO L226 Difference]: Without dead ends: 474 [2022-01-18 15:42:56,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:42:56,570 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 88 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:56,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 142 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-01-18 15:42:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 395. [2022-01-18 15:42:56,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.616751269035533) internal successors, (1031), 394 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1031 transitions. [2022-01-18 15:42:56,574 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1031 transitions. Word has length 19 [2022-01-18 15:42:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:56,574 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1031 transitions. [2022-01-18 15:42:56,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1031 transitions. [2022-01-18 15:42:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:56,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:56,575 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:56,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (596)] Forceful destruction successful, exit code 0 [2022-01-18 15:42:56,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable612,596 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:56,775 INFO L402 AbstractCegarLoop]: === Iteration 614 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:56,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:56,775 INFO L85 PathProgramCache]: Analyzing trace with hash -581968502, now seen corresponding path program 593 times [2022-01-18 15:42:56,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:56,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878600612] [2022-01-18 15:42:56,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:56,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:56,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:56,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878600612] [2022-01-18 15:42:56,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878600612] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:56,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379045651] [2022-01-18 15:42:56,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:42:56,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:56,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:56,874 INFO L229 MonitoredProcess]: Starting monitored process 597 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:56,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Waiting until timeout for monitored process [2022-01-18 15:42:56,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-18 15:42:56,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:56,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:56,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:57,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:57,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:57,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:57,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:57,192 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:57,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:57,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:57,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:57,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379045651] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:57,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:57,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:57,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713943424] [2022-01-18 15:42:57,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:57,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:57,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:57,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:57,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:57,217 INFO L87 Difference]: Start difference. First operand 395 states and 1031 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:58,018 INFO L93 Difference]: Finished difference Result 476 states and 1170 transitions. [2022-01-18 15:42:58,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:42:58,019 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:58,019 INFO L225 Difference]: With dead ends: 476 [2022-01-18 15:42:58,019 INFO L226 Difference]: Without dead ends: 470 [2022-01-18 15:42:58,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2022-01-18 15:42:58,020 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:58,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 158 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:58,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-01-18 15:42:58,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 399. [2022-01-18 15:42:58,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.620603015075377) internal successors, (1043), 398 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1043 transitions. [2022-01-18 15:42:58,024 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1043 transitions. Word has length 19 [2022-01-18 15:42:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:58,024 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1043 transitions. [2022-01-18 15:42:58,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:58,024 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1043 transitions. [2022-01-18 15:42:58,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:58,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:58,024 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:58,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (597)] Ended with exit code 0 [2022-01-18 15:42:58,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2022-01-18 15:42:58,225 INFO L402 AbstractCegarLoop]: === Iteration 615 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:58,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:58,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2088334738, now seen corresponding path program 594 times [2022-01-18 15:42:58,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:58,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496091052] [2022-01-18 15:42:58,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:58,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:58,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:58,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:58,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496091052] [2022-01-18 15:42:58,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496091052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:58,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015241729] [2022-01-18 15:42:58,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:42:58,323 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:58,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:58,323 INFO L229 MonitoredProcess]: Starting monitored process 598 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:58,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Waiting until timeout for monitored process [2022-01-18 15:42:58,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:42:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:42:58,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:58,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:58,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 55 [2022-01-18 15:42:58,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:58,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-01-18 15:42:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:58,667 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:58,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:42:58,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:42:58,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:58,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015241729] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:58,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:58,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:58,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325207235] [2022-01-18 15:42:58,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:58,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:58,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:58,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:58,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:58,695 INFO L87 Difference]: Start difference. First operand 399 states and 1043 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:42:59,195 INFO L93 Difference]: Finished difference Result 477 states and 1176 transitions. [2022-01-18 15:42:59,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:42:59,195 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:42:59,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:42:59,196 INFO L225 Difference]: With dead ends: 477 [2022-01-18 15:42:59,196 INFO L226 Difference]: Without dead ends: 473 [2022-01-18 15:42:59,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-01-18 15:42:59,196 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 76 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:42:59,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 165 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:42:59,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-18 15:42:59,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 399. [2022-01-18 15:42:59,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 398 states have (on average 2.6180904522613067) internal successors, (1042), 398 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 1042 transitions. [2022-01-18 15:42:59,202 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 1042 transitions. Word has length 19 [2022-01-18 15:42:59,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:42:59,202 INFO L470 AbstractCegarLoop]: Abstraction has 399 states and 1042 transitions. [2022-01-18 15:42:59,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:42:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 1042 transitions. [2022-01-18 15:42:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:42:59,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:42:59,203 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:42:59,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (598)] Ended with exit code 0 [2022-01-18 15:42:59,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,598 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:59,403 INFO L402 AbstractCegarLoop]: === Iteration 616 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:42:59,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:42:59,403 INFO L85 PathProgramCache]: Analyzing trace with hash 538755974, now seen corresponding path program 595 times [2022-01-18 15:42:59,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:42:59,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581410305] [2022-01-18 15:42:59,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:42:59,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:42:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:42:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581410305] [2022-01-18 15:42:59,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581410305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:42:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468898316] [2022-01-18 15:42:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:42:59,499 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:42:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:42:59,500 INFO L229 MonitoredProcess]: Starting monitored process 599 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:42:59,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Waiting until timeout for monitored process [2022-01-18 15:42:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:42:59,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:42:59,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:42:59,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:59,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-01-18 15:42:59,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:42:59,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-01-18 15:42:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:42:59,790 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:42:59,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:42:59,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:42:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:42:59,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468898316] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:42:59,813 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:42:59,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:42:59,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093564810] [2022-01-18 15:42:59,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:42:59,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:42:59,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:42:59,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:42:59,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:42:59,814 INFO L87 Difference]: Start difference. First operand 399 states and 1042 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:00,508 INFO L93 Difference]: Finished difference Result 489 states and 1200 transitions. [2022-01-18 15:43:00,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-18 15:43:00,509 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:00,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:00,509 INFO L225 Difference]: With dead ends: 489 [2022-01-18 15:43:00,509 INFO L226 Difference]: Without dead ends: 489 [2022-01-18 15:43:00,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-01-18 15:43:00,510 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 91 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:00,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 165 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:00,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2022-01-18 15:43:00,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 398. [2022-01-18 15:43:00,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.619647355163728) internal successors, (1040), 397 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1040 transitions. [2022-01-18 15:43:00,514 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1040 transitions. Word has length 19 [2022-01-18 15:43:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:00,514 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1040 transitions. [2022-01-18 15:43:00,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1040 transitions. [2022-01-18 15:43:00,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:00,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:00,514 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:00,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (599)] Ended with exit code 0 [2022-01-18 15:43:00,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2022-01-18 15:43:00,715 INFO L402 AbstractCegarLoop]: === Iteration 617 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:00,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:00,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1671402756, now seen corresponding path program 596 times [2022-01-18 15:43:00,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:00,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42410226] [2022-01-18 15:43:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:00,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:00,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:00,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42410226] [2022-01-18 15:43:00,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42410226] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:00,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484864271] [2022-01-18 15:43:00,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:00,817 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:00,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:00,818 INFO L229 MonitoredProcess]: Starting monitored process 600 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:00,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Waiting until timeout for monitored process [2022-01-18 15:43:00,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:01,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:01,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:43:01,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:01,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:43:01,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:01,179 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:01,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:43:01,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:43:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484864271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:01,208 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:01,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:01,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496839664] [2022-01-18 15:43:01,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:01,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:01,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:01,209 INFO L87 Difference]: Start difference. First operand 398 states and 1040 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:01,532 INFO L93 Difference]: Finished difference Result 429 states and 1092 transitions. [2022-01-18 15:43:01,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 15:43:01,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:01,532 INFO L225 Difference]: With dead ends: 429 [2022-01-18 15:43:01,533 INFO L226 Difference]: Without dead ends: 421 [2022-01-18 15:43:01,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-18 15:43:01,533 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:01,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 105 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-01-18 15:43:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 398. [2022-01-18 15:43:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.6171284634760705) internal successors, (1039), 397 states have internal predecessors, (1039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1039 transitions. [2022-01-18 15:43:01,536 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1039 transitions. Word has length 19 [2022-01-18 15:43:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:01,536 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1039 transitions. [2022-01-18 15:43:01,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1039 transitions. [2022-01-18 15:43:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:01,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:01,537 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:01,552 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (600)] Ended with exit code 0 [2022-01-18 15:43:01,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2022-01-18 15:43:01,738 INFO L402 AbstractCegarLoop]: === Iteration 618 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1614467130, now seen corresponding path program 597 times [2022-01-18 15:43:01,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:01,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177100349] [2022-01-18 15:43:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:01,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:01,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177100349] [2022-01-18 15:43:01,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177100349] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51624305] [2022-01-18 15:43:01,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:01,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:01,857 INFO L229 MonitoredProcess]: Starting monitored process 601 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:01,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Waiting until timeout for monitored process [2022-01-18 15:43:01,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 15:43:01,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:01,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:02,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:02,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:43:02,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:02,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:43:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:02,190 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:02,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:43:02,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:43:02,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:02,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51624305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:02,215 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:02,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:02,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301300795] [2022-01-18 15:43:02,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:02,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:02,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:02,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:02,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:02,216 INFO L87 Difference]: Start difference. First operand 398 states and 1039 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:03,053 INFO L93 Difference]: Finished difference Result 479 states and 1194 transitions. [2022-01-18 15:43:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 15:43:03,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:03,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:03,054 INFO L225 Difference]: With dead ends: 479 [2022-01-18 15:43:03,054 INFO L226 Difference]: Without dead ends: 479 [2022-01-18 15:43:03,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2022-01-18 15:43:03,055 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:03,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 158 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:03,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-01-18 15:43:03,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 397. [2022-01-18 15:43:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.6186868686868685) internal successors, (1037), 396 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1037 transitions. [2022-01-18 15:43:03,058 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1037 transitions. Word has length 19 [2022-01-18 15:43:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:03,058 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1037 transitions. [2022-01-18 15:43:03,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1037 transitions. [2022-01-18 15:43:03,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:03,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:03,063 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:03,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (601)] Ended with exit code 0 [2022-01-18 15:43:03,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,601 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:03,281 INFO L402 AbstractCegarLoop]: === Iteration 619 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:03,281 INFO L85 PathProgramCache]: Analyzing trace with hash -2035819218, now seen corresponding path program 598 times [2022-01-18 15:43:03,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:03,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547235199] [2022-01-18 15:43:03,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:03,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:03,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547235199] [2022-01-18 15:43:03,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547235199] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:03,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580976357] [2022-01-18 15:43:03,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:03,382 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:03,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:03,382 INFO L229 MonitoredProcess]: Starting monitored process 602 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:03,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Waiting until timeout for monitored process [2022-01-18 15:43:03,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:03,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:03,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:03,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:03,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:03,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:43:03,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:03,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:43:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:03,720 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:03,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:43:03,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:43:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:03,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580976357] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:03,747 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:03,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:03,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815499548] [2022-01-18 15:43:03,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:03,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:03,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:03,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:03,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:03,748 INFO L87 Difference]: Start difference. First operand 397 states and 1037 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:04,001 INFO L93 Difference]: Finished difference Result 427 states and 1086 transitions. [2022-01-18 15:43:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:04,002 INFO L225 Difference]: With dead ends: 427 [2022-01-18 15:43:04,002 INFO L226 Difference]: Without dead ends: 415 [2022-01-18 15:43:04,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-01-18 15:43:04,002 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:04,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 112 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:04,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-01-18 15:43:04,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 397. [2022-01-18 15:43:04,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.6161616161616164) internal successors, (1036), 396 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1036 transitions. [2022-01-18 15:43:04,006 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1036 transitions. Word has length 19 [2022-01-18 15:43:04,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:04,006 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 1036 transitions. [2022-01-18 15:43:04,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,006 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1036 transitions. [2022-01-18 15:43:04,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:04,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:04,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:04,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (602)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:04,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,602 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:04,207 INFO L402 AbstractCegarLoop]: === Iteration 620 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:04,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:04,207 INFO L85 PathProgramCache]: Analyzing trace with hash 601774598, now seen corresponding path program 599 times [2022-01-18 15:43:04,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:04,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37163756] [2022-01-18 15:43:04,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:04,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,310 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37163756] [2022-01-18 15:43:04,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37163756] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:04,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284948410] [2022-01-18 15:43:04,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:04,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:04,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:04,311 INFO L229 MonitoredProcess]: Starting monitored process 603 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:04,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Waiting until timeout for monitored process [2022-01-18 15:43:04,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:04,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:04,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:04,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:04,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:04,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:43:04,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:04,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:43:04,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:04,617 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:04,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:43:04,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:43:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:04,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284948410] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:04,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:04,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:04,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983462393] [2022-01-18 15:43:04,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:04,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:04,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:04,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:04,641 INFO L87 Difference]: Start difference. First operand 397 states and 1036 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:04,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:04,996 INFO L93 Difference]: Finished difference Result 458 states and 1153 transitions. [2022-01-18 15:43:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:04,997 INFO L225 Difference]: With dead ends: 458 [2022-01-18 15:43:04,997 INFO L226 Difference]: Without dead ends: 458 [2022-01-18 15:43:04,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:43:04,997 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:04,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 100 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:04,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-01-18 15:43:05,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 396. [2022-01-18 15:43:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.617721518987342) internal successors, (1034), 395 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1034 transitions. [2022-01-18 15:43:05,001 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1034 transitions. Word has length 19 [2022-01-18 15:43:05,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:05,001 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1034 transitions. [2022-01-18 15:43:05,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1034 transitions. [2022-01-18 15:43:05,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:05,001 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:05,001 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:05,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (603)] Ended with exit code 0 [2022-01-18 15:43:05,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,603 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:05,202 INFO L402 AbstractCegarLoop]: === Iteration 621 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:05,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:05,202 INFO L85 PathProgramCache]: Analyzing trace with hash -995583420, now seen corresponding path program 600 times [2022-01-18 15:43:05,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:05,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004248454] [2022-01-18 15:43:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:05,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:05,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:05,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:05,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004248454] [2022-01-18 15:43:05,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004248454] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:05,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131445708] [2022-01-18 15:43:05,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 15:43:05,309 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:05,310 INFO L229 MonitoredProcess]: Starting monitored process 604 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:05,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Waiting until timeout for monitored process [2022-01-18 15:43:05,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 15:43:05,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:05,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:05,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:05,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:05,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2022-01-18 15:43:05,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:05,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-01-18 15:43:05,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:05,653 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:05,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:43:05,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:43:05,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:05,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131445708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:05,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:05,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:05,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197777098] [2022-01-18 15:43:05,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:05,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:05,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:05,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:05,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:05,682 INFO L87 Difference]: Start difference. First operand 396 states and 1034 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:05,865 INFO L93 Difference]: Finished difference Result 421 states and 1074 transitions. [2022-01-18 15:43:05,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:05,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:05,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:05,866 INFO L225 Difference]: With dead ends: 421 [2022-01-18 15:43:05,866 INFO L226 Difference]: Without dead ends: 405 [2022-01-18 15:43:05,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-01-18 15:43:05,866 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:05,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 97 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:05,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-01-18 15:43:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 396. [2022-01-18 15:43:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.6151898734177217) internal successors, (1033), 395 states have internal predecessors, (1033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1033 transitions. [2022-01-18 15:43:05,870 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1033 transitions. Word has length 19 [2022-01-18 15:43:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:05,870 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1033 transitions. [2022-01-18 15:43:05,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:05,870 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1033 transitions. [2022-01-18 15:43:05,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:05,870 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:05,870 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:05,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (604)] Ended with exit code 0 [2022-01-18 15:43:06,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 604 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2022-01-18 15:43:06,071 INFO L402 AbstractCegarLoop]: === Iteration 622 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:06,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash -726922822, now seen corresponding path program 601 times [2022-01-18 15:43:06,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:06,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707907341] [2022-01-18 15:43:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:06,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:06,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:06,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707907341] [2022-01-18 15:43:06,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707907341] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557928850] [2022-01-18 15:43:06,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 15:43:06,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:06,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:06,171 INFO L229 MonitoredProcess]: Starting monitored process 605 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:06,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Waiting until timeout for monitored process [2022-01-18 15:43:06,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:06,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:06,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:06,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:43:06,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:06,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:43:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:06,477 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:06,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:43:06,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:43:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557928850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:06,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:06,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:06,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366807664] [2022-01-18 15:43:06,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:06,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:06,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:06,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:06,501 INFO L87 Difference]: Start difference. First operand 396 states and 1033 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:06,684 INFO L93 Difference]: Finished difference Result 442 states and 1120 transitions. [2022-01-18 15:43:06,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:06,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:06,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:06,685 INFO L225 Difference]: With dead ends: 442 [2022-01-18 15:43:06,685 INFO L226 Difference]: Without dead ends: 442 [2022-01-18 15:43:06,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:06,685 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 40 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:06,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 106 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 15:43:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-18 15:43:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 393. [2022-01-18 15:43:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.6096938775510203) internal successors, (1023), 392 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1023 transitions. [2022-01-18 15:43:06,689 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1023 transitions. Word has length 19 [2022-01-18 15:43:06,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:06,689 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1023 transitions. [2022-01-18 15:43:06,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:06,689 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1023 transitions. [2022-01-18 15:43:06,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:06,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:06,690 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:06,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (605)] Ended with exit code 0 [2022-01-18 15:43:06,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2022-01-18 15:43:06,890 INFO L402 AbstractCegarLoop]: === Iteration 623 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:06,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:06,890 INFO L85 PathProgramCache]: Analyzing trace with hash -682076138, now seen corresponding path program 602 times [2022-01-18 15:43:06,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:06,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568724768] [2022-01-18 15:43:06,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:06,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:06,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568724768] [2022-01-18 15:43:06,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568724768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:06,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47323823] [2022-01-18 15:43:06,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 15:43:06,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:06,993 INFO L229 MonitoredProcess]: Starting monitored process 606 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:06,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Waiting until timeout for monitored process [2022-01-18 15:43:07,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 15:43:07,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:07,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:07,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:07,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:07,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:43:07,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:07,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:43:07,206 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:07,326 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:07,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:43:07,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:43:07,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47323823] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:07,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:07,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:07,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180753177] [2022-01-18 15:43:07,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:07,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:07,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:07,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:07,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:07,348 INFO L87 Difference]: Start difference. First operand 393 states and 1023 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:07,627 INFO L93 Difference]: Finished difference Result 554 states and 1312 transitions. [2022-01-18 15:43:07,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:07,627 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:07,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:07,628 INFO L225 Difference]: With dead ends: 554 [2022-01-18 15:43:07,628 INFO L226 Difference]: Without dead ends: 554 [2022-01-18 15:43:07,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-01-18 15:43:07,628 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:07,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 354 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 15:43:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2022-01-18 15:43:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 395. [2022-01-18 15:43:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.6142131979695433) internal successors, (1030), 394 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1030 transitions. [2022-01-18 15:43:07,632 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1030 transitions. Word has length 19 [2022-01-18 15:43:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:07,632 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1030 transitions. [2022-01-18 15:43:07,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:07,632 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1030 transitions. [2022-01-18 15:43:07,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:07,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:07,633 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:07,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (606)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:07,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,606 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:07,833 INFO L402 AbstractCegarLoop]: === Iteration 624 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:07,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:07,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1665314764, now seen corresponding path program 603 times [2022-01-18 15:43:07,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:07,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265318192] [2022-01-18 15:43:07,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:07,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:07,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:07,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:07,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265318192] [2022-01-18 15:43:07,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265318192] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:07,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435051994] [2022-01-18 15:43:07,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 15:43:07,935 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:07,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:07,936 INFO L229 MonitoredProcess]: Starting monitored process 607 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:07,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Waiting until timeout for monitored process [2022-01-18 15:43:07,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 15:43:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:08,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:08,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-01-18 15:43:08,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:08,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-01-18 15:43:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:08,286 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:08,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:43:08,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2022-01-18 15:43:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:08,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435051994] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:08,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:08,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:08,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350809324] [2022-01-18 15:43:08,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:08,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:08,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:08,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:08,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:08,314 INFO L87 Difference]: Start difference. First operand 395 states and 1030 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:08,753 INFO L93 Difference]: Finished difference Result 518 states and 1228 transitions. [2022-01-18 15:43:08,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 15:43:08,753 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:08,754 INFO L225 Difference]: With dead ends: 518 [2022-01-18 15:43:08,754 INFO L226 Difference]: Without dead ends: 494 [2022-01-18 15:43:08,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:43:08,754 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:08,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 452 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:08,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-18 15:43:08,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 408. [2022-01-18 15:43:08,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.597051597051597) internal successors, (1057), 407 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1057 transitions. [2022-01-18 15:43:08,758 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1057 transitions. Word has length 19 [2022-01-18 15:43:08,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:08,759 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1057 transitions. [2022-01-18 15:43:08,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1057 transitions. [2022-01-18 15:43:08,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:08,759 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:08,759 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:08,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (607)] Forceful destruction successful, exit code 0 [2022-01-18 15:43:08,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable623,607 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:08,959 INFO L402 AbstractCegarLoop]: === Iteration 625 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:08,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:08,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1263623878, now seen corresponding path program 604 times [2022-01-18 15:43:08,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:08,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036088911] [2022-01-18 15:43:08,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:08,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:08,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:09,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036088911] [2022-01-18 15:43:09,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036088911] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:09,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597745938] [2022-01-18 15:43:09,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 15:43:09,059 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:09,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:09,060 INFO L229 MonitoredProcess]: Starting monitored process 608 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:09,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Waiting until timeout for monitored process [2022-01-18 15:43:09,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 15:43:09,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:09,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:09,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:09,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:09,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-01-18 15:43:09,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:09,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 2 [2022-01-18 15:43:09,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:09,392 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:09,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 36 [2022-01-18 15:43:09,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2022-01-18 15:43:09,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:09,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597745938] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 15:43:09,414 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 15:43:09,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-01-18 15:43:09,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192071935] [2022-01-18 15:43:09,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 15:43:09,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 15:43:09,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 15:43:09,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 15:43:09,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-01-18 15:43:09,415 INFO L87 Difference]: Start difference. First operand 408 states and 1057 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 15:43:09,903 INFO L93 Difference]: Finished difference Result 609 states and 1433 transitions. [2022-01-18 15:43:09,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-18 15:43:09,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-18 15:43:09,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 15:43:09,904 INFO L225 Difference]: With dead ends: 609 [2022-01-18 15:43:09,904 INFO L226 Difference]: Without dead ends: 600 [2022-01-18 15:43:09,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-18 15:43:09,904 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 116 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 15:43:09,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 386 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 15:43:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-18 15:43:09,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 401. [2022-01-18 15:43:09,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 2.6125) internal successors, (1045), 400 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 1045 transitions. [2022-01-18 15:43:09,909 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 1045 transitions. Word has length 19 [2022-01-18 15:43:09,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 15:43:09,909 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 1045 transitions. [2022-01-18 15:43:09,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 15:43:09,909 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 1045 transitions. [2022-01-18 15:43:09,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-18 15:43:09,909 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 15:43:09,909 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 15:43:09,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (608)] Ended with exit code 0 [2022-01-18 15:43:10,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2022-01-18 15:43:10,110 INFO L402 AbstractCegarLoop]: === Iteration 626 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-01-18 15:43:10,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 15:43:10,110 INFO L85 PathProgramCache]: Analyzing trace with hash 92420176, now seen corresponding path program 605 times [2022-01-18 15:43:10,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 15:43:10,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543989595] [2022-01-18 15:43:10,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 15:43:10,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 15:43:10,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 15:43:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 15:43:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543989595] [2022-01-18 15:43:10,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543989595] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 15:43:10,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540711143] [2022-01-18 15:43:10,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 15:43:10,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 15:43:10,212 INFO L229 MonitoredProcess]: Starting monitored process 609 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-18 15:43:10,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Waiting until timeout for monitored process [2022-01-18 15:43:10,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 15:43:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 15:43:10,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 15:43:10,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 15:43:10,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:10,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-01-18 15:43:10,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 15:43:10,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-01-18 15:43:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 15:43:10,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 15:43:10,554 INFO L353 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2022-01-18 15:43:10,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2022-01-18 15:43:10,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 Received shutdown request... [2022-01-18 15:43:10,572 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-01-18 15:43:10,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Ended with exit code 0 [2022-01-18 15:43:10,608 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:43:10,613 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (609)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 15:43:10,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable625,609 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 15:43:10,773 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 19 known predicates. [2022-01-18 15:43:10,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-01-18 15:43:10,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-01-18 15:43:10,776 INFO L732 BasicCegarLoop]: Path program histogram: [605, 6, 6, 6, 2, 1] [2022-01-18 15:43:10,778 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 15:43:10,778 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 15:43:10,779 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 03:43:10 BasicIcfg [2022-01-18 15:43:10,779 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 15:43:10,779 INFO L158 Benchmark]: Toolchain (without parser) took 814575.61ms. Allocated memory was 411.0MB in the beginning and 639.6MB in the end (delta: 228.6MB). Free memory was 371.2MB in the beginning and 285.7MB in the end (delta: 85.5MB). Peak memory consumption was 318.2MB. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 411.0MB. Free memory is still 372.4MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L158 Benchmark]: Boogie Procedure Inliner took 16.74ms. Allocated memory is still 411.0MB. Free memory was 371.0MB in the beginning and 369.6MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L158 Benchmark]: Boogie Preprocessor took 10.45ms. Allocated memory is still 411.0MB. Free memory was 369.6MB in the beginning and 368.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L158 Benchmark]: RCFGBuilder took 183.80ms. Allocated memory is still 411.0MB. Free memory was 368.5MB in the beginning and 357.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L158 Benchmark]: TraceAbstraction took 814361.64ms. Allocated memory was 411.0MB in the beginning and 639.6MB in the end (delta: 228.6MB). Free memory was 356.8MB in the beginning and 285.7MB in the end (delta: 71.1MB). Peak memory consumption was 301.4MB. Max. memory is 16.0GB. [2022-01-18 15:43:10,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10ms. Allocated memory is still 411.0MB. Free memory is still 372.4MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 16.74ms. Allocated memory is still 411.0MB. Free memory was 371.0MB in the beginning and 369.6MB in the end (delta: 1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 10.45ms. Allocated memory is still 411.0MB. Free memory was 369.6MB in the beginning and 368.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 183.80ms. Allocated memory is still 411.0MB. Free memory was 368.5MB in the beginning and 357.3MB in the end (delta: 11.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 814361.64ms. Allocated memory was 411.0MB in the beginning and 639.6MB in the end (delta: 228.6MB). Free memory was 356.8MB in the beginning and 285.7MB in the end (delta: 71.1MB). Peak memory consumption was 301.4MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 19 known predicates. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 19 known predicates. - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PredicateComparison was comparing new predicate (quantifier-free) to 19 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 814.3s, OverallIterations: 626, TraceHistogramMax: 4, PathProgramHistogramMax: 605, EmptinessCheckTime: 0.2s, AutomataDifference: 229.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 34249 SdHoareTripleChecker+Valid, 105.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34249 mSDsluCounter, 112127 SdHoareTripleChecker+Invalid, 89.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 31342 IncrementalHoareTripleChecker+Unchecked, 186360 mSDsCounter, 7272 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 272106 IncrementalHoareTripleChecker+Invalid, 310720 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7272 mSolverCounterUnsat, 9813 mSDtfsCounter, 272106 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 30986 GetRequests, 13368 SyntacticMatches, 3157 SemanticMatches, 14461 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 79165 ImplicationChecksByTransitivity, 255.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=468occurred in iteration=519, InterpolantAutomatonStates: 11052, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.7s AutomataMinimizationTime, 625 MinimizatonAttempts, 56271 StatesRemovedByMinimization, 623 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.7s SsaConstructionTime, 7.1s SatisfiabilityAnalysisTime, 440.1s InterpolantComputationTime, 21382 NumberOfCodeBlocks, 21382 NumberOfCodeBlocksAsserted, 2004 NumberOfCheckSat, 30124 ConstructedInterpolants, 1293 QuantifiedInterpolants, 457238 SizeOfPredicates, 7855 NumberOfNonLiveVariables, 47014 ConjunctsInSsa, 12355 ConjunctsInUnsatCore, 1839 InterpolantComputations, 18 PerfectInterpolantSequences, 2565/19611 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown