/usr/bin/java -Xmx8000000000 -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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:39:10,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:39:10,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:39:10,057 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:39:10,116 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.epf [2022-01-28 15:39:10,140 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:39:10,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:39:10,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:39:10,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:39:10,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:39:10,141 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:39:10,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:39:10,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:39:10,141 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:39:10,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:39:10,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:39:10,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:39:10,143 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:39:10,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:39:10,144 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:39:10,145 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:39:10,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:39:10,360 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:39:10,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:39:10,363 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:39:10,365 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:39:10,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl [2022-01-28 15:39:10,367 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/array-sum-alt.wvr.bpl' [2022-01-28 15:39:10,390 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:39:10,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:39:10,393 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:39:10,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:39:10,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:39:10,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,410 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,414 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:39:10,416 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:39:10,417 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:39:10,417 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:39:10,417 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:39:10,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,425 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,425 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:39:10,435 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:39:10,435 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:39:10,435 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:39:10,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/1) ... [2022-01-28 15:39:10,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:39:10,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:10,462 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) [2022-01-28 15:39:10,475 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 [2022-01-28 15:39:10,496 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:39:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:39:10,496 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:39:10,496 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:39:10,496 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:39:10,496 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:39:10,497 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:39:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:39:10,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:39:10,497 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:39:10,497 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:39:10,498 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:39:10,498 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:39:10,545 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:39:10,547 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:39:10,657 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:39:10,667 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:39:10,668 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:39:10,669 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:39:10 BoogieIcfgContainer [2022-01-28 15:39:10,669 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:39:10,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:39:10,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:39:10,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:39:10,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:39:10" (1/2) ... [2022-01-28 15:39:10,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cfd7800 and model type array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:39:10, skipping insertion in model container [2022-01-28 15:39:10,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:39:10" (2/2) ... [2022-01-28 15:39:10,678 INFO L111 eAbstractionObserver]: Analyzing ICFG array-sum-alt.wvr.bpl [2022-01-28 15:39:10,683 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:39:10,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:39:10,684 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:39:10,684 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:39:10,725 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-28 15:39:10,766 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:39:10,772 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 [2022-01-28 15:39:10,773 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-28 15:39:10,782 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 32 transitions, 88 flow [2022-01-28 15:39:10,829 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:10,831 INFO L276 IsEmpty]: Start isEmpty. Operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-28 15:39:10,839 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:10,840 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:10,840 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:10,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:10,844 INFO L85 PathProgramCache]: Analyzing trace with hash 855514725, now seen corresponding path program 1 times [2022-01-28 15:39:10,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:10,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781651754] [2022-01-28 15:39:10,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:10,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:10,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:11,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:11,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:11,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781651754] [2022-01-28 15:39:11,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781651754] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:11,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:11,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:39:11,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45434028] [2022-01-28 15:39:11,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:11,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:39:11,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:39:11,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:39:11,030 INFO L87 Difference]: Start difference. First operand has 193 states, 192 states have (on average 2.8802083333333335) internal successors, (553), 192 states have internal predecessors, (553), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-01-28 15:39:11,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:11,122 INFO L93 Difference]: Finished difference Result 298 states and 858 transitions. [2022-01-28 15:39:11,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:39:11,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 18 [2022-01-28 15:39:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:11,138 INFO L225 Difference]: With dead ends: 298 [2022-01-28 15:39:11,139 INFO L226 Difference]: Without dead ends: 283 [2022-01-28 15:39:11,140 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 [2022-01-28 15:39:11,142 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:11,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 33 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-28 15:39:11,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 230. [2022-01-28 15:39:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.8820960698689957) internal successors, (660), 229 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:11,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 660 transitions. [2022-01-28 15:39:11,234 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 660 transitions. Word has length 18 [2022-01-28 15:39:11,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:11,235 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 660 transitions. [2022-01-28 15:39:11,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-01-28 15:39:11,235 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 660 transitions. [2022-01-28 15:39:11,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:11,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:11,238 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:11,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:39:11,239 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:11,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:11,239 INFO L85 PathProgramCache]: Analyzing trace with hash -116344776, now seen corresponding path program 1 times [2022-01-28 15:39:11,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:11,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176725720] [2022-01-28 15:39:11,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:11,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:11,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:11,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176725720] [2022-01-28 15:39:11,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176725720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:11,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711884975] [2022-01-28 15:39:11,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:11,331 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:11,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:11,339 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) [2022-01-28 15:39:11,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:39:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:11,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:39:11,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:11,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:11,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711884975] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:11,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:11,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-28 15:39:11,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522356363] [2022-01-28 15:39:11,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:11,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:39:11,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:11,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:39:11,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:11,730 INFO L87 Difference]: Start difference. First operand 230 states and 660 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:12,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:12,259 INFO L93 Difference]: Finished difference Result 1259 states and 3629 transitions. [2022-01-28 15:39:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:39:12,259 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-01-28 15:39:12,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:12,270 INFO L225 Difference]: With dead ends: 1259 [2022-01-28 15:39:12,270 INFO L226 Difference]: Without dead ends: 1259 [2022-01-28 15:39:12,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=261, Invalid=609, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:39:12,273 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 367 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:12,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 88 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-01-28 15:39:12,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 253. [2022-01-28 15:39:12,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.9523809523809526) internal successors, (744), 252 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 744 transitions. [2022-01-28 15:39:12,307 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 744 transitions. Word has length 21 [2022-01-28 15:39:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:12,308 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 744 transitions. [2022-01-28 15:39:12,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:12,308 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 744 transitions. [2022-01-28 15:39:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:12,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:12,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:12,342 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:12,544 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -310245444, now seen corresponding path program 2 times [2022-01-28 15:39:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:12,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388277716] [2022-01-28 15:39:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:12,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:12,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:12,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:12,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388277716] [2022-01-28 15:39:12,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388277716] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:12,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560428682] [2022-01-28 15:39:12,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:12,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:12,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:12,601 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) [2022-01-28 15:39:12,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:39:12,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:12,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:12,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:39:12,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:12,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:12,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:12,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560428682] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:12,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:12,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-01-28 15:39:12,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266577070] [2022-01-28 15:39:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:12,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:39:12,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:12,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:39:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:12,825 INFO L87 Difference]: Start difference. First operand 253 states and 744 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:13,187 INFO L93 Difference]: Finished difference Result 1133 states and 3241 transitions. [2022-01-28 15:39:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:39:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 21 [2022-01-28 15:39:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:13,192 INFO L225 Difference]: With dead ends: 1133 [2022-01-28 15:39:13,193 INFO L226 Difference]: Without dead ends: 1133 [2022-01-28 15:39:13,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=556, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:39:13,194 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 301 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:13,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 95 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-01-28 15:39:13,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 252. [2022-01-28 15:39:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.9362549800796813) internal successors, (737), 251 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) [2022-01-28 15:39:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 737 transitions. [2022-01-28 15:39:13,207 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 737 transitions. Word has length 21 [2022-01-28 15:39:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 737 transitions. [2022-01-28 15:39:13,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:13,207 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 737 transitions. [2022-01-28 15:39:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:13,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:13,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:13,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:13,423 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,SelfDestructingSolverStorable2 [2022-01-28 15:39:13,424 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:13,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:13,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1009084743, now seen corresponding path program 1 times [2022-01-28 15:39:13,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:13,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280830417] [2022-01-28 15:39:13,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:13,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:13,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:13,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280830417] [2022-01-28 15:39:13,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280830417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:13,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:13,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:39:13,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930742002] [2022-01-28 15:39:13,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:13,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:39:13,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:13,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:39:13,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:39:13,460 INFO L87 Difference]: Start difference. First operand 252 states and 737 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-01-28 15:39:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:13,511 INFO L93 Difference]: Finished difference Result 483 states and 1371 transitions. [2022-01-28 15:39:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:39:13,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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 21 [2022-01-28 15:39:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:13,514 INFO L225 Difference]: With dead ends: 483 [2022-01-28 15:39:13,514 INFO L226 Difference]: Without dead ends: 477 [2022-01-28 15:39:13,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:39:13,515 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 94 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:13,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 28 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:39:13,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-01-28 15:39:13,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 327. [2022-01-28 15:39:13,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.941717791411043) internal successors, (959), 326 states have internal predecessors, (959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:13,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 959 transitions. [2022-01-28 15:39:13,534 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 959 transitions. Word has length 21 [2022-01-28 15:39:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:13,534 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 959 transitions. [2022-01-28 15:39:13,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-01-28 15:39:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 959 transitions. [2022-01-28 15:39:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:13,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:13,535 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:13,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-28 15:39:13,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:13,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:13,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1724408590, now seen corresponding path program 1 times [2022-01-28 15:39:13,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:13,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255559432] [2022-01-28 15:39:13,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:13,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:13,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255559432] [2022-01-28 15:39:13,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255559432] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:13,568 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:13,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:39:13,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242607171] [2022-01-28 15:39:13,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:13,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:39:13,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:13,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:39:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:39:13,569 INFO L87 Difference]: Start difference. First operand 327 states and 959 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2022-01-28 15:39:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:13,634 INFO L93 Difference]: Finished difference Result 539 states and 1537 transitions. [2022-01-28 15:39:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:39:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21 [2022-01-28 15:39:13,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:13,637 INFO L225 Difference]: With dead ends: 539 [2022-01-28 15:39:13,637 INFO L226 Difference]: Without dead ends: 521 [2022-01-28 15:39:13,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:39:13,638 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:13,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 45 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:39:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-01-28 15:39:13,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 398. [2022-01-28 15:39:13,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.929471032745592) internal successors, (1163), 397 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) [2022-01-28 15:39:13,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1163 transitions. [2022-01-28 15:39:13,648 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1163 transitions. Word has length 21 [2022-01-28 15:39:13,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:13,649 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1163 transitions. [2022-01-28 15:39:13,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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) [2022-01-28 15:39:13,649 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1163 transitions. [2022-01-28 15:39:13,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:13,650 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:13,650 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:13,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 15:39:13,650 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1927279607, now seen corresponding path program 2 times [2022-01-28 15:39:13,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:13,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527195961] [2022-01-28 15:39:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:13,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:13,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527195961] [2022-01-28 15:39:13,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527195961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:13,687 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:13,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-28 15:39:13,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420346611] [2022-01-28 15:39:13,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:13,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:39:13,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:13,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:39:13,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:39:13,688 INFO L87 Difference]: Start difference. First operand 398 states and 1163 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-01-28 15:39:13,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:13,725 INFO L93 Difference]: Finished difference Result 486 states and 1392 transitions. [2022-01-28 15:39:13,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:39:13,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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 21 [2022-01-28 15:39:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:13,728 INFO L225 Difference]: With dead ends: 486 [2022-01-28 15:39:13,728 INFO L226 Difference]: Without dead ends: 486 [2022-01-28 15:39:13,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:39:13,729 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:13,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:39:13,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-01-28 15:39:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 362. [2022-01-28 15:39:13,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9418282548476453) internal successors, (1062), 361 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) [2022-01-28 15:39:13,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1062 transitions. [2022-01-28 15:39:13,741 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1062 transitions. Word has length 21 [2022-01-28 15:39:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:13,741 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 1062 transitions. [2022-01-28 15:39:13,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 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) [2022-01-28 15:39:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1062 transitions. [2022-01-28 15:39:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:13,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:13,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:13,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 15:39:13,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:13,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1202883661, now seen corresponding path program 3 times [2022-01-28 15:39:13,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:13,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085431209] [2022-01-28 15:39:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:13,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:13,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085431209] [2022-01-28 15:39:13,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085431209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:13,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:13,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 15:39:13,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247643048] [2022-01-28 15:39:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:13,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:39:13,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:13,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:39:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:39:13,801 INFO L87 Difference]: Start difference. First operand 362 states and 1062 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:13,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:13,849 INFO L93 Difference]: Finished difference Result 438 states and 1246 transitions. [2022-01-28 15:39:13,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:39:13,850 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21 [2022-01-28 15:39:13,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:13,852 INFO L225 Difference]: With dead ends: 438 [2022-01-28 15:39:13,852 INFO L226 Difference]: Without dead ends: 438 [2022-01-28 15:39:13,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:39:13,853 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:13,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 45 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:39:13,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-01-28 15:39:13,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 323. [2022-01-28 15:39:13,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:13,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-01-28 15:39:13,862 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-01-28 15:39:13,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:13,863 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-01-28 15:39:13,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:13,863 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-01-28 15:39:13,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:13,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:13,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:13,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 15:39:13,864 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:13,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:13,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1580700470, now seen corresponding path program 3 times [2022-01-28 15:39:13,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:13,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761285768] [2022-01-28 15:39:13,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:13,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:13,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:13,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:13,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761285768] [2022-01-28 15:39:13,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761285768] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891708105] [2022-01-28 15:39:13,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:13,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:13,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:13,924 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) [2022-01-28 15:39:13,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:39:13,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:39:13,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:13,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:39:13,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:13,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:14,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891708105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:14,065 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:14,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-28 15:39:14,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539503282] [2022-01-28 15:39:14,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:14,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:39:14,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:14,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:39:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:39:14,066 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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) [2022-01-28 15:39:14,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:14,379 INFO L93 Difference]: Finished difference Result 1154 states and 3249 transitions. [2022-01-28 15:39:14,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-28 15:39:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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 21 [2022-01-28 15:39:14,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:14,384 INFO L225 Difference]: With dead ends: 1154 [2022-01-28 15:39:14,385 INFO L226 Difference]: Without dead ends: 1154 [2022-01-28 15:39:14,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:39:14,385 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 183 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:14,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 89 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-01-28 15:39:14,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 323. [2022-01-28 15:39:14,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.8975155279503104) internal successors, (933), 322 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:14,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 933 transitions. [2022-01-28 15:39:14,398 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 933 transitions. Word has length 21 [2022-01-28 15:39:14,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:14,398 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 933 transitions. [2022-01-28 15:39:14,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 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) [2022-01-28 15:39:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 933 transitions. [2022-01-28 15:39:14,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:14,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:14,399 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:14,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:14,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:14,612 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:14,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:14,612 INFO L85 PathProgramCache]: Analyzing trace with hash -731586770, now seen corresponding path program 2 times [2022-01-28 15:39:14,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:14,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397420381] [2022-01-28 15:39:14,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:14,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:14,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:14,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:14,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397420381] [2022-01-28 15:39:14,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397420381] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:14,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:14,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 15:39:14,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068895983] [2022-01-28 15:39:14,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:14,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:39:14,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:14,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:39:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:39:14,660 INFO L87 Difference]: Start difference. First operand 323 states and 933 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2022-01-28 15:39:14,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:14,762 INFO L93 Difference]: Finished difference Result 466 states and 1366 transitions. [2022-01-28 15:39:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:39:14,762 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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 21 [2022-01-28 15:39:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:14,764 INFO L225 Difference]: With dead ends: 466 [2022-01-28 15:39:14,764 INFO L226 Difference]: Without dead ends: 466 [2022-01-28 15:39:14,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:14,766 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 93 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:14,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 48 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:14,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-28 15:39:14,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 276. [2022-01-28 15:39:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.92) internal successors, (803), 275 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 803 transitions. [2022-01-28 15:39:14,774 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 803 transitions. Word has length 21 [2022-01-28 15:39:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:14,774 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 803 transitions. [2022-01-28 15:39:14,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 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) [2022-01-28 15:39:14,774 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 803 transitions. [2022-01-28 15:39:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:14,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:14,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:14,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-28 15:39:14,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:14,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:14,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1391482172, now seen corresponding path program 4 times [2022-01-28 15:39:14,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:14,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330327930] [2022-01-28 15:39:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:14,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:14,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:14,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330327930] [2022-01-28 15:39:14,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330327930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:14,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:14,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 15:39:14,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214293806] [2022-01-28 15:39:14,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:14,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:39:14,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:14,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:39:14,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:39:14,822 INFO L87 Difference]: Start difference. First operand 276 states and 803 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:14,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:14,916 INFO L93 Difference]: Finished difference Result 541 states and 1520 transitions. [2022-01-28 15:39:14,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-28 15:39:14,917 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21 [2022-01-28 15:39:14,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:14,919 INFO L225 Difference]: With dead ends: 541 [2022-01-28 15:39:14,919 INFO L226 Difference]: Without dead ends: 537 [2022-01-28 15:39:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:39:14,920 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:14,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 79 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:14,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-28 15:39:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 276. [2022-01-28 15:39:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.9127272727272726) internal successors, (801), 275 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 801 transitions. [2022-01-28 15:39:14,928 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 801 transitions. Word has length 21 [2022-01-28 15:39:14,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:14,928 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 801 transitions. [2022-01-28 15:39:14,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 801 transitions. [2022-01-28 15:39:14,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:14,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:14,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:14,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-28 15:39:14,930 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:14,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:14,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1513963908, now seen corresponding path program 5 times [2022-01-28 15:39:14,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:14,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254121715] [2022-01-28 15:39:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:14,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:14,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:14,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254121715] [2022-01-28 15:39:14,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254121715] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:14,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113727723] [2022-01-28 15:39:14,991 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:14,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:14,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:15,004 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) [2022-01-28 15:39:15,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:39:15,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:39:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:15,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:15,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:15,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113727723] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:15,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-01-28 15:39:15,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7, 6] total 12 [2022-01-28 15:39:15,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846534040] [2022-01-28 15:39:15,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:15,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:39:15,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:15,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:39:15,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:15,162 INFO L87 Difference]: Start difference. First operand 276 states and 801 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:15,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:15,296 INFO L93 Difference]: Finished difference Result 653 states and 1834 transitions. [2022-01-28 15:39:15,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-28 15:39:15,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21 [2022-01-28 15:39:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:15,300 INFO L225 Difference]: With dead ends: 653 [2022-01-28 15:39:15,300 INFO L226 Difference]: Without dead ends: 653 [2022-01-28 15:39:15,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:15,301 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:15,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 63 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:15,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-28 15:39:15,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 278. [2022-01-28 15:39:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.916967509025271) internal successors, (808), 277 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 808 transitions. [2022-01-28 15:39:15,311 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 808 transitions. Word has length 21 [2022-01-28 15:39:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:15,311 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 808 transitions. [2022-01-28 15:39:15,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 808 transitions. [2022-01-28 15:39:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:39:15,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:15,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:15,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:15,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:15,549 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash 268685562, now seen corresponding path program 6 times [2022-01-28 15:39:15,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:15,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467756393] [2022-01-28 15:39:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:15,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:15,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:15,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:15,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467756393] [2022-01-28 15:39:15,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467756393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:39:15,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:39:15,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-28 15:39:15,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460264632] [2022-01-28 15:39:15,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:39:15,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:39:15,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:15,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:39:15,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:39:15,577 INFO L87 Difference]: Start difference. First operand 278 states and 808 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:15,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:15,644 INFO L93 Difference]: Finished difference Result 429 states and 1251 transitions. [2022-01-28 15:39:15,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:39:15,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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 21 [2022-01-28 15:39:15,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:15,647 INFO L225 Difference]: With dead ends: 429 [2022-01-28 15:39:15,647 INFO L226 Difference]: Without dead ends: 425 [2022-01-28 15:39:15,647 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 [2022-01-28 15:39:15,647 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:15,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-01-28 15:39:15,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 278. [2022-01-28 15:39:15,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.9097472924187726) internal successors, (806), 277 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 806 transitions. [2022-01-28 15:39:15,654 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 806 transitions. Word has length 21 [2022-01-28 15:39:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:15,654 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 806 transitions. [2022-01-28 15:39:15,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 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) [2022-01-28 15:39:15,655 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 806 transitions. [2022-01-28 15:39:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:15,655 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:15,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:15,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-28 15:39:15,656 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:15,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1300936698, now seen corresponding path program 1 times [2022-01-28 15:39:15,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549102135] [2022-01-28 15:39:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:15,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:15,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:15,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:15,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549102135] [2022-01-28 15:39:15,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549102135] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:15,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703022735] [2022-01-28 15:39:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:15,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:15,723 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) [2022-01-28 15:39:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:39:15,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:15,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:39:15,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:15,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:39:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:15,978 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:15,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:15,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:16,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703022735] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:16,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:16,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-01-28 15:39:16,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159400608] [2022-01-28 15:39:16,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:16,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:39:16,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:16,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:39:16,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:39:16,027 INFO L87 Difference]: Start difference. First operand 278 states and 806 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:16,097 INFO L93 Difference]: Finished difference Result 552 states and 1614 transitions. [2022-01-28 15:39:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:39:16,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:16,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:16,099 INFO L225 Difference]: With dead ends: 552 [2022-01-28 15:39:16,099 INFO L226 Difference]: Without dead ends: 537 [2022-01-28 15:39:16,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:39:16,100 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:16,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 68 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-28 15:39:16,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 372. [2022-01-28 15:39:16,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.981132075471698) internal successors, (1106), 371 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) [2022-01-28 15:39:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1106 transitions. [2022-01-28 15:39:16,108 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1106 transitions. Word has length 24 [2022-01-28 15:39:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:16,108 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 1106 transitions. [2022-01-28 15:39:16,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1106 transitions. [2022-01-28 15:39:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:16,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:16,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:16,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:16,323 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,SelfDestructingSolverStorable12 [2022-01-28 15:39:16,324 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:16,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1432556635, now seen corresponding path program 1 times [2022-01-28 15:39:16,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:16,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353619899] [2022-01-28 15:39:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:16,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:16,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353619899] [2022-01-28 15:39:16,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353619899] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:16,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974045295] [2022-01-28 15:39:16,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:16,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:16,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:16,519 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) [2022-01-28 15:39:16,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:39:16,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:16,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:16,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:16,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:39:16,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:39:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:16,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:16,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:16,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:17,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:17,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974045295] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:17,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:17,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-01-28 15:39:17,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385194412] [2022-01-28 15:39:17,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:17,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:39:17,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:17,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:39:17,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:39:17,068 INFO L87 Difference]: Start difference. First operand 372 states and 1106 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:17,926 INFO L93 Difference]: Finished difference Result 850 states and 2460 transitions. [2022-01-28 15:39:17,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:39:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:17,930 INFO L225 Difference]: With dead ends: 850 [2022-01-28 15:39:17,930 INFO L226 Difference]: Without dead ends: 835 [2022-01-28 15:39:17,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:39:17,931 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 233 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 697 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:17,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 180 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 697 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2022-01-28 15:39:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 438. [2022-01-28 15:39:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.954233409610984) internal successors, (1291), 437 states have internal predecessors, (1291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1291 transitions. [2022-01-28 15:39:17,941 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1291 transitions. Word has length 24 [2022-01-28 15:39:17,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:17,941 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 1291 transitions. [2022-01-28 15:39:17,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:17,941 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1291 transitions. [2022-01-28 15:39:17,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:17,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:17,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:17,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:18,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:18,156 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:18,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1637705597, now seen corresponding path program 2 times [2022-01-28 15:39:18,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:18,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84362779] [2022-01-28 15:39:18,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:18,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:18,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:18,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:18,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84362779] [2022-01-28 15:39:18,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84362779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:18,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87259340] [2022-01-28 15:39:18,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:18,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:18,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:18,384 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) [2022-01-28 15:39:18,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:39:18,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:18,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:18,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:18,560 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-01-28 15:39:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:18,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:18,737 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:18,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:18,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:18,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87259340] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:18,805 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:18,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 17 [2022-01-28 15:39:18,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586959192] [2022-01-28 15:39:18,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:18,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:39:18,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:18,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:39:18,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:39:18,806 INFO L87 Difference]: Start difference. First operand 438 states and 1291 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:20,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:20,103 INFO L93 Difference]: Finished difference Result 1170 states and 3382 transitions. [2022-01-28 15:39:20,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:39:20,103 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:20,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:20,107 INFO L225 Difference]: With dead ends: 1170 [2022-01-28 15:39:20,108 INFO L226 Difference]: Without dead ends: 1155 [2022-01-28 15:39:20,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=399, Invalid=1493, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:39:20,108 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 270 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:20,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 222 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2022-01-28 15:39:20,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 439. [2022-01-28 15:39:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.958904109589041) internal successors, (1296), 438 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1296 transitions. [2022-01-28 15:39:20,120 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1296 transitions. Word has length 24 [2022-01-28 15:39:20,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:20,120 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1296 transitions. [2022-01-28 15:39:20,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1296 transitions. [2022-01-28 15:39:20,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:20,121 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:20,121 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:20,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:20,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:20,335 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:20,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:20,336 INFO L85 PathProgramCache]: Analyzing trace with hash 142032238, now seen corresponding path program 2 times [2022-01-28 15:39:20,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:20,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979634576] [2022-01-28 15:39:20,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:20,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:20,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:20,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979634576] [2022-01-28 15:39:20,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979634576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003630261] [2022-01-28 15:39:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:20,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:20,379 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) [2022-01-28 15:39:20,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:20,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:20,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-28 15:39:20,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:39:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:20,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:39:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:20,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:20,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:20,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 16 [2022-01-28 15:39:20,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2022-01-28 15:39:20,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:20,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003630261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:20,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:20,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-28 15:39:20,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478375082] [2022-01-28 15:39:20,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:20,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:39:20,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:20,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:39:20,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:39:20,615 INFO L87 Difference]: Start difference. First operand 439 states and 1296 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2022-01-28 15:39:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:20,696 INFO L93 Difference]: Finished difference Result 645 states and 1906 transitions. [2022-01-28 15:39:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:39:20,696 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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 24 [2022-01-28 15:39:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:20,699 INFO L225 Difference]: With dead ends: 645 [2022-01-28 15:39:20,699 INFO L226 Difference]: Without dead ends: 630 [2022-01-28 15:39:20,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:39:20,701 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 51 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:20,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-28 15:39:20,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 471. [2022-01-28 15:39:20,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9617021276595743) internal successors, (1392), 470 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:20,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1392 transitions. [2022-01-28 15:39:20,710 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1392 transitions. Word has length 24 [2022-01-28 15:39:20,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:20,710 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1392 transitions. [2022-01-28 15:39:20,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 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) [2022-01-28 15:39:20,711 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1392 transitions. [2022-01-28 15:39:20,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:20,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:20,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:20,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:20,915 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,SelfDestructingSolverStorable15 [2022-01-28 15:39:20,915 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:20,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:20,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1337506361, now seen corresponding path program 3 times [2022-01-28 15:39:20,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:20,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264016613] [2022-01-28 15:39:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:20,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:21,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:21,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264016613] [2022-01-28 15:39:21,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264016613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:21,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647064023] [2022-01-28 15:39:21,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:21,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:21,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:21,074 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) [2022-01-28 15:39:21,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:39:21,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:39:21,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:21,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:21,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:21,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:39:21,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:21,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:21,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:21,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:21,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:21,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647064023] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:21,456 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:21,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 16 [2022-01-28 15:39:21,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284337106] [2022-01-28 15:39:21,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:21,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:39:21,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:21,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:39:21,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:21,457 INFO L87 Difference]: Start difference. First operand 471 states and 1392 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:21,748 INFO L93 Difference]: Finished difference Result 679 states and 1940 transitions. [2022-01-28 15:39:21,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:39:21,748 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:21,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:21,751 INFO L225 Difference]: With dead ends: 679 [2022-01-28 15:39:21,751 INFO L226 Difference]: Without dead ends: 664 [2022-01-28 15:39:21,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=428, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:39:21,752 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 115 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 393 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:21,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 139 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 393 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:21,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-28 15:39:21,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 465. [2022-01-28 15:39:21,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.9547413793103448) internal successors, (1371), 464 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:21,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1371 transitions. [2022-01-28 15:39:21,775 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1371 transitions. Word has length 24 [2022-01-28 15:39:21,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:21,775 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1371 transitions. [2022-01-28 15:39:21,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:21,775 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1371 transitions. [2022-01-28 15:39:21,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:21,776 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:21,776 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:21,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:21,985 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,SelfDestructingSolverStorable16 [2022-01-28 15:39:21,985 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:21,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:21,986 INFO L85 PathProgramCache]: Analyzing trace with hash 857029177, now seen corresponding path program 4 times [2022-01-28 15:39:21,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:21,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628612597] [2022-01-28 15:39:21,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:21,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:21,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:22,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:22,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628612597] [2022-01-28 15:39:22,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628612597] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:22,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860527114] [2022-01-28 15:39:22,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:22,106 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:22,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:22,107 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) [2022-01-28 15:39:22,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:39:22,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:22,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:22,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:22,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:22,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-28 15:39:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:22,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:22,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:22,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:22,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:22,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860527114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:22,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:22,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-01-28 15:39:22,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893501495] [2022-01-28 15:39:22,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:22,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:39:22,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:39:22,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:39:22,501 INFO L87 Difference]: Start difference. First operand 465 states and 1371 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:22,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:22,871 INFO L93 Difference]: Finished difference Result 794 states and 2321 transitions. [2022-01-28 15:39:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:39:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:22,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:22,875 INFO L225 Difference]: With dead ends: 794 [2022-01-28 15:39:22,875 INFO L226 Difference]: Without dead ends: 779 [2022-01-28 15:39:22,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:39:22,876 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 122 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:22,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 138 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:22,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-01-28 15:39:22,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 469. [2022-01-28 15:39:22,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.950854700854701) internal successors, (1381), 468 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1381 transitions. [2022-01-28 15:39:22,885 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1381 transitions. Word has length 24 [2022-01-28 15:39:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:22,886 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1381 transitions. [2022-01-28 15:39:22,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1381 transitions. [2022-01-28 15:39:22,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:22,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:22,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:22,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:23,103 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,SelfDestructingSolverStorable17 [2022-01-28 15:39:23,104 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:23,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1638934791, now seen corresponding path program 5 times [2022-01-28 15:39:23,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:23,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720180728] [2022-01-28 15:39:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:23,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:23,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:23,286 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720180728] [2022-01-28 15:39:23,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720180728] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:23,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19289233] [2022-01-28 15:39:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:23,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:23,287 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) [2022-01-28 15:39:23,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:39:23,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:23,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:23,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:23,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:23,448 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:23,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-28 15:39:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:23,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:23,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:23,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:23,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:23,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19289233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:23,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:23,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-28 15:39:23,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625100390] [2022-01-28 15:39:23,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:23,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:39:23,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:39:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:39:23,795 INFO L87 Difference]: Start difference. First operand 469 states and 1381 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-01-28 15:39:24,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:24,253 INFO L93 Difference]: Finished difference Result 1008 states and 2935 transitions. [2022-01-28 15:39:24,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:39:24,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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 24 [2022-01-28 15:39:24,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:24,257 INFO L225 Difference]: With dead ends: 1008 [2022-01-28 15:39:24,258 INFO L226 Difference]: Without dead ends: 978 [2022-01-28 15:39:24,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:39:24,259 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:24,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 217 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 445 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-01-28 15:39:24,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 978 states. [2022-01-28 15:39:24,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 978 to 471. [2022-01-28 15:39:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9574468085106385) internal successors, (1390), 470 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1390 transitions. [2022-01-28 15:39:24,271 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1390 transitions. Word has length 24 [2022-01-28 15:39:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:24,271 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1390 transitions. [2022-01-28 15:39:24,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 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) [2022-01-28 15:39:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1390 transitions. [2022-01-28 15:39:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:24,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:24,272 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:24,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:24,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:24,487 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:24,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:24,488 INFO L85 PathProgramCache]: Analyzing trace with hash -931811517, now seen corresponding path program 6 times [2022-01-28 15:39:24,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:24,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372051651] [2022-01-28 15:39:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:24,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:24,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:24,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372051651] [2022-01-28 15:39:24,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372051651] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:24,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883815805] [2022-01-28 15:39:24,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:24,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:24,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:24,648 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) [2022-01-28 15:39:24,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:39:24,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:39:24,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:24,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:24,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:24,856 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:39:24,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2022-01-28 15:39:24,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:24,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:25,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:25,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:25,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:25,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883815805] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:25,118 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:25,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-28 15:39:25,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345183240] [2022-01-28 15:39:25,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:25,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:39:25,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:25,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:39:25,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:25,119 INFO L87 Difference]: Start difference. First operand 471 states and 1390 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:26,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:26,140 INFO L93 Difference]: Finished difference Result 935 states and 2730 transitions. [2022-01-28 15:39:26,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:39:26,140 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:26,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:26,143 INFO L225 Difference]: With dead ends: 935 [2022-01-28 15:39:26,143 INFO L226 Difference]: Without dead ends: 920 [2022-01-28 15:39:26,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=1174, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:39:26,144 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 175 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:26,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 575 Invalid, 0 Unknown, 40 Unchecked, 0.3s Time] [2022-01-28 15:39:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-28 15:39:26,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 487. [2022-01-28 15:39:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.9794238683127574) internal successors, (1448), 486 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1448 transitions. [2022-01-28 15:39:26,155 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1448 transitions. Word has length 24 [2022-01-28 15:39:26,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:26,155 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1448 transitions. [2022-01-28 15:39:26,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1448 transitions. [2022-01-28 15:39:26,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:26,156 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:26,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:26,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:26,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:26,372 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:26,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1768350663, now seen corresponding path program 7 times [2022-01-28 15:39:26,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:26,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024631143] [2022-01-28 15:39:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:26,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:26,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:26,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024631143] [2022-01-28 15:39:26,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024631143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:26,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455979507] [2022-01-28 15:39:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:39:26,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:26,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:26,556 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) [2022-01-28 15:39:26,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:39:26,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:26,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:26,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:26,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:26,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2022-01-28 15:39:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:26,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:26,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:26,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:27,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455979507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:27,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:27,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 19 [2022-01-28 15:39:27,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906238304] [2022-01-28 15:39:27,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:27,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:39:27,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:27,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:39:27,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:39:27,015 INFO L87 Difference]: Start difference. First operand 487 states and 1448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-01-28 15:39:27,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:27,464 INFO L93 Difference]: Finished difference Result 1068 states and 3118 transitions. [2022-01-28 15:39:27,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:39:27,465 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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 24 [2022-01-28 15:39:27,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:27,469 INFO L225 Difference]: With dead ends: 1068 [2022-01-28 15:39:27,469 INFO L226 Difference]: Without dead ends: 1038 [2022-01-28 15:39:27,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=220, Invalid=772, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:39:27,469 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 226 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:27,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 187 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 434 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-01-28 15:39:27,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2022-01-28 15:39:27,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 483. [2022-01-28 15:39:27,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.975103734439834) internal successors, (1434), 482 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:27,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 1434 transitions. [2022-01-28 15:39:27,480 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 1434 transitions. Word has length 24 [2022-01-28 15:39:27,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:27,480 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 1434 transitions. [2022-01-28 15:39:27,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 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) [2022-01-28 15:39:27,481 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 1434 transitions. [2022-01-28 15:39:27,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:27,481 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:27,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:27,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:27,683 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,SelfDestructingSolverStorable20 [2022-01-28 15:39:27,684 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:27,684 INFO L85 PathProgramCache]: Analyzing trace with hash 906932625, now seen corresponding path program 8 times [2022-01-28 15:39:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:27,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289972274] [2022-01-28 15:39:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:27,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:27,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289972274] [2022-01-28 15:39:27,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289972274] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:27,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047593310] [2022-01-28 15:39:27,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:27,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:27,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:27,856 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) [2022-01-28 15:39:27,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:39:27,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:27,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:27,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:27,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:27,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2022-01-28 15:39:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:28,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:28,174 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:28,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:28,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:28,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047593310] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:28,264 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:28,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 18 [2022-01-28 15:39:28,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379900578] [2022-01-28 15:39:28,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:28,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:39:28,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:39:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:39:28,265 INFO L87 Difference]: Start difference. First operand 483 states and 1434 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:29,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:29,868 INFO L93 Difference]: Finished difference Result 1208 states and 3557 transitions. [2022-01-28 15:39:29,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:39:29,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:29,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:29,876 INFO L225 Difference]: With dead ends: 1208 [2022-01-28 15:39:29,876 INFO L226 Difference]: Without dead ends: 1193 [2022-01-28 15:39:29,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:39:29,877 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 231 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:29,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 207 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:29,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-01-28 15:39:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 473. [2022-01-28 15:39:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.9533898305084745) internal successors, (1394), 472 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 1394 transitions. [2022-01-28 15:39:29,888 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 1394 transitions. Word has length 24 [2022-01-28 15:39:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:29,889 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 1394 transitions. [2022-01-28 15:39:29,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 1394 transitions. [2022-01-28 15:39:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:39:29,890 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:29,890 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:29,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-28 15:39:30,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:30,100 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:30,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1310802373, now seen corresponding path program 9 times [2022-01-28 15:39:30,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:30,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411144178] [2022-01-28 15:39:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:30,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:30,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:30,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411144178] [2022-01-28 15:39:30,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411144178] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:30,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102411820] [2022-01-28 15:39:30,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:30,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:30,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:30,236 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) [2022-01-28 15:39:30,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:39:30,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:39:30,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:30,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-28 15:39:30,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:30,480 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-01-28 15:39:30,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 26 [2022-01-28 15:39:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:30,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:30,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:39:30,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 17 [2022-01-28 15:39:30,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2022-01-28 15:39:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:30,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102411820] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:30,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:30,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2022-01-28 15:39:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376288185] [2022-01-28 15:39:30,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:30,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:39:30,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:39:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:30,683 INFO L87 Difference]: Start difference. First operand 473 states and 1394 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:31,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:31,382 INFO L93 Difference]: Finished difference Result 904 states and 2639 transitions. [2022-01-28 15:39:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:39:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:39:31,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:31,385 INFO L225 Difference]: With dead ends: 904 [2022-01-28 15:39:31,385 INFO L226 Difference]: Without dead ends: 889 [2022-01-28 15:39:31,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=232, Invalid=890, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:39:31,385 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 200 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:31,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 177 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 422 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-01-28 15:39:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-01-28 15:39:31,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 471. [2022-01-28 15:39:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9553191489361703) internal successors, (1389), 470 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:31,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1389 transitions. [2022-01-28 15:39:31,395 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1389 transitions. Word has length 24 [2022-01-28 15:39:31,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:31,395 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1389 transitions. [2022-01-28 15:39:31,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:31,395 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1389 transitions. [2022-01-28 15:39:31,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:31,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:31,396 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:31,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:31,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:31,607 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:31,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2134065829, now seen corresponding path program 3 times [2022-01-28 15:39:31,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:31,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622711038] [2022-01-28 15:39:31,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:31,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:31,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:31,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622711038] [2022-01-28 15:39:31,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622711038] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:31,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069568884] [2022-01-28 15:39:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:31,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:31,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:31,657 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) [2022-01-28 15:39:31,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:39:31,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:39:31,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:31,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:31,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:31,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:31,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069568884] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:31,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:31,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:39:31,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013214627] [2022-01-28 15:39:31,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:31,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:39:31,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:31,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:39:31,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:31,896 INFO L87 Difference]: Start difference. First operand 471 states and 1389 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-01-28 15:39:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:33,239 INFO L93 Difference]: Finished difference Result 3570 states and 10088 transitions. [2022-01-28 15:39:33,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-28 15:39:33,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) Word has length 27 [2022-01-28 15:39:33,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:33,247 INFO L225 Difference]: With dead ends: 3570 [2022-01-28 15:39:33,247 INFO L226 Difference]: Without dead ends: 3570 [2022-01-28 15:39:33,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1738, Invalid=6272, Unknown=0, NotChecked=0, Total=8010 [2022-01-28 15:39:33,249 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 590 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 590 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 1286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:33,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [590 Valid, 330 Invalid, 1286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:39:33,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3570 states. [2022-01-28 15:39:33,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3570 to 658. [2022-01-28 15:39:33,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 657 states have (on average 3.2739726027397262) internal successors, (2151), 657 states have internal predecessors, (2151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:33,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 2151 transitions. [2022-01-28 15:39:33,282 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 2151 transitions. Word has length 27 [2022-01-28 15:39:33,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:33,283 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 2151 transitions. [2022-01-28 15:39:33,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-01-28 15:39:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 2151 transitions. [2022-01-28 15:39:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:33,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:33,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:33,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:33,500 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,SelfDestructingSolverStorable23 [2022-01-28 15:39:33,501 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:33,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:33,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1967000799, now seen corresponding path program 4 times [2022-01-28 15:39:33,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:33,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132925398] [2022-01-28 15:39:33,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:33,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:33,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132925398] [2022-01-28 15:39:33,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132925398] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:33,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663226409] [2022-01-28 15:39:33,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:33,540 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:33,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:33,541 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) [2022-01-28 15:39:33,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:39:33,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:33,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:33,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:33,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663226409] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:33,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:39:33,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131444159] [2022-01-28 15:39:33,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:33,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:39:33,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:39:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:39:33,772 INFO L87 Difference]: Start difference. First operand 658 states and 2151 transitions. Second operand has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-01-28 15:39:35,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:35,579 INFO L93 Difference]: Finished difference Result 3557 states and 10114 transitions. [2022-01-28 15:39:35,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-28 15:39:35,580 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) Word has length 27 [2022-01-28 15:39:35,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:35,590 INFO L225 Difference]: With dead ends: 3557 [2022-01-28 15:39:35,590 INFO L226 Difference]: Without dead ends: 3557 [2022-01-28 15:39:35,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4935 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2334, Invalid=9876, Unknown=0, NotChecked=0, Total=12210 [2022-01-28 15:39:35,595 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 639 mSDsluCounter, 731 mSDsCounter, 0 mSdLazyCounter, 1549 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:35,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 439 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:39:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-01-28 15:39:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 642. [2022-01-28 15:39:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 642 states, 641 states have (on average 3.2449297971918876) internal successors, (2080), 641 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 642 states to 642 states and 2080 transitions. [2022-01-28 15:39:35,632 INFO L78 Accepts]: Start accepts. Automaton has 642 states and 2080 transitions. Word has length 27 [2022-01-28 15:39:35,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:35,633 INFO L470 AbstractCegarLoop]: Abstraction has 642 states and 2080 transitions. [2022-01-28 15:39:35,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.6470588235294117) internal successors, (62), 17 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) [2022-01-28 15:39:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 642 states and 2080 transitions. [2022-01-28 15:39:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:35,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:35,634 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:35,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:35,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:35,846 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:35,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1712302181, now seen corresponding path program 5 times [2022-01-28 15:39:35,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043518037] [2022-01-28 15:39:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:35,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:35,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:35,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043518037] [2022-01-28 15:39:35,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043518037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:35,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246495753] [2022-01-28 15:39:35,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:35,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:35,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:35,882 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) [2022-01-28 15:39:35,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:39:35,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:39:35,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:35,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:36,012 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:36,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:36,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246495753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:36,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:36,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:39:36,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373821667] [2022-01-28 15:39:36,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:36,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:39:36,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:36,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:39:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:39:36,124 INFO L87 Difference]: Start difference. First operand 642 states and 2080 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2022-01-28 15:39:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:37,082 INFO L93 Difference]: Finished difference Result 2695 states and 7631 transitions. [2022-01-28 15:39:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 15:39:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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) Word has length 27 [2022-01-28 15:39:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:37,088 INFO L225 Difference]: With dead ends: 2695 [2022-01-28 15:39:37,088 INFO L226 Difference]: Without dead ends: 2695 [2022-01-28 15:39:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1021, Invalid=3671, Unknown=0, NotChecked=0, Total=4692 [2022-01-28 15:39:37,090 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 387 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:37,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 280 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-01-28 15:39:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 650. [2022-01-28 15:39:37,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 650 states, 649 states have (on average 3.2342064714946073) internal successors, (2099), 649 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:37,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 2099 transitions. [2022-01-28 15:39:37,115 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 2099 transitions. Word has length 27 [2022-01-28 15:39:37,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:37,115 INFO L470 AbstractCegarLoop]: Abstraction has 650 states and 2099 transitions. [2022-01-28 15:39:37,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 15 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) [2022-01-28 15:39:37,115 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 2099 transitions. [2022-01-28 15:39:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:37,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:37,117 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:37,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:37,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:37,327 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:37,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:37,328 INFO L85 PathProgramCache]: Analyzing trace with hash 599427504, now seen corresponding path program 10 times [2022-01-28 15:39:37,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:37,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506059944] [2022-01-28 15:39:37,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:37,328 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:37,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:37,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:37,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506059944] [2022-01-28 15:39:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506059944] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465055979] [2022-01-28 15:39:37,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:37,367 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:37,368 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) [2022-01-28 15:39:37,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:39:37,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:37,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:37,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465055979] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:37,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:37,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:39:37,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449568378] [2022-01-28 15:39:37,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:37,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:39:37,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:37,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:39:37,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:39:37,593 INFO L87 Difference]: Start difference. First operand 650 states and 2099 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:38,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:38,357 INFO L93 Difference]: Finished difference Result 2700 states and 7794 transitions. [2022-01-28 15:39:38,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-28 15:39:38,358 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:38,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:38,364 INFO L225 Difference]: With dead ends: 2700 [2022-01-28 15:39:38,364 INFO L226 Difference]: Without dead ends: 2700 [2022-01-28 15:39:38,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-28 15:39:38,366 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 418 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:38,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 242 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:38,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2700 states. [2022-01-28 15:39:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2700 to 669. [2022-01-28 15:39:38,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 669 states, 668 states have (on average 3.2230538922155687) internal successors, (2153), 668 states have internal predecessors, (2153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:38,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 2153 transitions. [2022-01-28 15:39:38,390 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 2153 transitions. Word has length 27 [2022-01-28 15:39:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:38,390 INFO L470 AbstractCegarLoop]: Abstraction has 669 states and 2153 transitions. [2022-01-28 15:39:38,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 2153 transitions. [2022-01-28 15:39:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:38,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:38,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:38,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:38,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:38,607 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:38,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:38,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1019160408, now seen corresponding path program 6 times [2022-01-28 15:39:38,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:38,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262941037] [2022-01-28 15:39:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:38,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:38,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:38,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:38,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262941037] [2022-01-28 15:39:38,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262941037] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:38,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959465608] [2022-01-28 15:39:38,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:38,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:38,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:38,673 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) [2022-01-28 15:39:38,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:39:38,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:38,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:38,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:38,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:39:38,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:38,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:38,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:38,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959465608] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:38,829 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:38,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-28 15:39:38,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171453661] [2022-01-28 15:39:38,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:38,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:39:38,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:38,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:39:38,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:39:38,830 INFO L87 Difference]: Start difference. First operand 669 states and 2153 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-01-28 15:39:38,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:38,977 INFO L93 Difference]: Finished difference Result 1474 states and 4523 transitions. [2022-01-28 15:39:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:39:38,977 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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 27 [2022-01-28 15:39:38,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:38,981 INFO L225 Difference]: With dead ends: 1474 [2022-01-28 15:39:38,981 INFO L226 Difference]: Without dead ends: 1450 [2022-01-28 15:39:38,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:39:38,982 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:38,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 85 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:38,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1450 states. [2022-01-28 15:39:38,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1450 to 1011. [2022-01-28 15:39:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.291089108910891) internal successors, (3324), 1010 states have internal predecessors, (3324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:39,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3324 transitions. [2022-01-28 15:39:39,002 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3324 transitions. Word has length 27 [2022-01-28 15:39:39,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:39,002 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3324 transitions. [2022-01-28 15:39:39,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 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) [2022-01-28 15:39:39,002 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3324 transitions. [2022-01-28 15:39:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:39,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:39,005 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:39,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:39,222 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,SelfDestructingSolverStorable27 [2022-01-28 15:39:39,223 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:39,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:39,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1294087731, now seen corresponding path program 1 times [2022-01-28 15:39:39,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:39,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706107004] [2022-01-28 15:39:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:39,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:39,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:39,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706107004] [2022-01-28 15:39:39,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706107004] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:39,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683249394] [2022-01-28 15:39:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:39,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:39,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:39,264 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) [2022-01-28 15:39:39,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:39:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:39,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:39,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:39,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683249394] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:39,460 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:39,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:39:39,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841537544] [2022-01-28 15:39:39,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:39,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:39,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:39,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:39,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:39,461 INFO L87 Difference]: Start difference. First operand 1011 states and 3324 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:40,011 INFO L93 Difference]: Finished difference Result 2336 states and 6930 transitions. [2022-01-28 15:39:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-28 15:39:40,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:40,016 INFO L225 Difference]: With dead ends: 2336 [2022-01-28 15:39:40,016 INFO L226 Difference]: Without dead ends: 2310 [2022-01-28 15:39:40,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2022-01-28 15:39:40,017 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 334 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:40,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 135 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2310 states. [2022-01-28 15:39:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2310 to 1264. [2022-01-28 15:39:40,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.32541567695962) internal successors, (4200), 1263 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4200 transitions. [2022-01-28 15:39:40,045 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4200 transitions. Word has length 27 [2022-01-28 15:39:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:40,045 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4200 transitions. [2022-01-28 15:39:40,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4200 transitions. [2022-01-28 15:39:40,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:40,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:40,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:40,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:40,264 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,SelfDestructingSolverStorable28 [2022-01-28 15:39:40,264 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:40,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:40,264 INFO L85 PathProgramCache]: Analyzing trace with hash -374136488, now seen corresponding path program 11 times [2022-01-28 15:39:40,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:40,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875460560] [2022-01-28 15:39:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:40,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:40,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:40,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875460560] [2022-01-28 15:39:40,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875460560] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:40,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49388709] [2022-01-28 15:39:40,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:40,304 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:40,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:40,305 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) [2022-01-28 15:39:40,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 15:39:40,326 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:39:40,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:40,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:40,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:40,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:40,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49388709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:40,469 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:40,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:39:40,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913638740] [2022-01-28 15:39:40,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:40,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:39:40,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:40,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:39:40,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:39:40,470 INFO L87 Difference]: Start difference. First operand 1264 states and 4200 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:40,774 INFO L93 Difference]: Finished difference Result 3138 states and 9728 transitions. [2022-01-28 15:39:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-28 15:39:40,774 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:40,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:40,780 INFO L225 Difference]: With dead ends: 3138 [2022-01-28 15:39:40,780 INFO L226 Difference]: Without dead ends: 3099 [2022-01-28 15:39:40,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:39:40,781 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 244 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:40,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 212 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2022-01-28 15:39:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 1754. [2022-01-28 15:39:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1753 states have (on average 3.407872219053052) internal successors, (5974), 1753 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 5974 transitions. [2022-01-28 15:39:40,823 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 5974 transitions. Word has length 27 [2022-01-28 15:39:40,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:40,823 INFO L470 AbstractCegarLoop]: Abstraction has 1754 states and 5974 transitions. [2022-01-28 15:39:40,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:40,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 5974 transitions. [2022-01-28 15:39:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:40,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:40,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:40,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:41,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:41,039 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:41,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1217309363, now seen corresponding path program 2 times [2022-01-28 15:39:41,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:41,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846434858] [2022-01-28 15:39:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:41,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:41,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:41,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846434858] [2022-01-28 15:39:41,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846434858] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:41,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113096889] [2022-01-28 15:39:41,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:41,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:41,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:41,068 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) [2022-01-28 15:39:41,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 15:39:41,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:41,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:41,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:41,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:41,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:41,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:41,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:41,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113096889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:41,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:41,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:39:41,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206851724] [2022-01-28 15:39:41,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:41,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:41,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:41,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:41,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:41,246 INFO L87 Difference]: Start difference. First operand 1754 states and 5974 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:41,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:41,643 INFO L93 Difference]: Finished difference Result 2934 states and 9093 transitions. [2022-01-28 15:39:41,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:39:41,644 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:41,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:41,649 INFO L225 Difference]: With dead ends: 2934 [2022-01-28 15:39:41,649 INFO L226 Difference]: Without dead ends: 2912 [2022-01-28 15:39:41,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:39:41,650 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 282 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:41,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 109 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2912 states. [2022-01-28 15:39:41,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2912 to 1747. [2022-01-28 15:39:41,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1746 states have (on average 3.413516609392898) internal successors, (5960), 1746 states have internal predecessors, (5960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 5960 transitions. [2022-01-28 15:39:41,692 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 5960 transitions. Word has length 27 [2022-01-28 15:39:41,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:41,692 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 5960 transitions. [2022-01-28 15:39:41,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:41,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 5960 transitions. [2022-01-28 15:39:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:41,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:41,696 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:41,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:41,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:41,912 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:41,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:41,912 INFO L85 PathProgramCache]: Analyzing trace with hash 2125115793, now seen corresponding path program 3 times [2022-01-28 15:39:41,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:41,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426171183] [2022-01-28 15:39:41,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:41,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:41,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426171183] [2022-01-28 15:39:41,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426171183] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:41,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38908907] [2022-01-28 15:39:41,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:41,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:41,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:41,950 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) [2022-01-28 15:39:41,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 15:39:41,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:39:41,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:41,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:41,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:42,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:42,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38908907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:42,110 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:42,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-28 15:39:42,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274193601] [2022-01-28 15:39:42,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:42,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:39:42,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:42,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:39:42,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:42,111 INFO L87 Difference]: Start difference. First operand 1747 states and 5960 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:42,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:42,507 INFO L93 Difference]: Finished difference Result 4585 states and 13921 transitions. [2022-01-28 15:39:42,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:39:42,509 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-01-28 15:39:42,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:42,518 INFO L225 Difference]: With dead ends: 4585 [2022-01-28 15:39:42,518 INFO L226 Difference]: Without dead ends: 4559 [2022-01-28 15:39:42,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:39:42,519 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 355 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:42,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 98 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:42,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2022-01-28 15:39:42,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1846. [2022-01-28 15:39:42,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1846 states, 1845 states have (on average 3.4655826558265583) internal successors, (6394), 1845 states have internal predecessors, (6394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1846 states to 1846 states and 6394 transitions. [2022-01-28 15:39:42,577 INFO L78 Accepts]: Start accepts. Automaton has 1846 states and 6394 transitions. Word has length 27 [2022-01-28 15:39:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:42,577 INFO L470 AbstractCegarLoop]: Abstraction has 1846 states and 6394 transitions. [2022-01-28 15:39:42,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1846 states and 6394 transitions. [2022-01-28 15:39:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:42,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:42,581 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:42,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:42,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:42,795 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:42,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:42,796 INFO L85 PathProgramCache]: Analyzing trace with hash -665957700, now seen corresponding path program 7 times [2022-01-28 15:39:42,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:42,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335010242] [2022-01-28 15:39:42,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:42,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:42,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:42,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:42,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335010242] [2022-01-28 15:39:42,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335010242] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:42,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60832895] [2022-01-28 15:39:42,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:39:42,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:42,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:42,825 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) [2022-01-28 15:39:42,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 15:39:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:42,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:42,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:42,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:42,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:43,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60832895] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:43,008 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:43,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-28 15:39:43,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679805683] [2022-01-28 15:39:43,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:43,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:39:43,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:43,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:39:43,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:43,009 INFO L87 Difference]: Start difference. First operand 1846 states and 6394 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:43,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:43,279 INFO L93 Difference]: Finished difference Result 3417 states and 10465 transitions. [2022-01-28 15:39:43,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-28 15:39:43,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:43,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:43,286 INFO L225 Difference]: With dead ends: 3417 [2022-01-28 15:39:43,286 INFO L226 Difference]: Without dead ends: 3417 [2022-01-28 15:39:43,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=274, Invalid=482, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:39:43,287 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 356 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:43,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 125 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:39:43,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2022-01-28 15:39:43,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 1858. [2022-01-28 15:39:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1858 states, 1857 states have (on average 3.4426494345718903) internal successors, (6393), 1857 states have internal predecessors, (6393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1858 states to 1858 states and 6393 transitions. [2022-01-28 15:39:43,329 INFO L78 Accepts]: Start accepts. Automaton has 1858 states and 6393 transitions. Word has length 27 [2022-01-28 15:39:43,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:43,330 INFO L470 AbstractCegarLoop]: Abstraction has 1858 states and 6393 transitions. [2022-01-28 15:39:43,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 1858 states and 6393 transitions. [2022-01-28 15:39:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:43,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:43,333 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:43,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:43,551 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,SelfDestructingSolverStorable32 [2022-01-28 15:39:43,551 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:43,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1012536837, now seen corresponding path program 8 times [2022-01-28 15:39:43,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352348147] [2022-01-28 15:39:43,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:43,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:43,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:43,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352348147] [2022-01-28 15:39:43,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352348147] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:43,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773481679] [2022-01-28 15:39:43,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:43,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:43,598 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) [2022-01-28 15:39:43,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 15:39:43,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:43,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:43,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:43,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:43,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:43,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773481679] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:43,782 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:43,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-01-28 15:39:43,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729510705] [2022-01-28 15:39:43,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:43,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:43,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:43,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:43,783 INFO L87 Difference]: Start difference. First operand 1858 states and 6393 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:44,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:44,603 INFO L93 Difference]: Finished difference Result 7165 states and 21721 transitions. [2022-01-28 15:39:44,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:39:44,604 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:44,620 INFO L225 Difference]: With dead ends: 7165 [2022-01-28 15:39:44,620 INFO L226 Difference]: Without dead ends: 7165 [2022-01-28 15:39:44,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2022-01-28 15:39:44,625 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 535 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:44,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 215 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:44,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7165 states. [2022-01-28 15:39:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7165 to 2005. [2022-01-28 15:39:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2005 states, 2004 states have (on average 3.4865269461077846) internal successors, (6987), 2004 states have internal predecessors, (6987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2005 states to 2005 states and 6987 transitions. [2022-01-28 15:39:44,699 INFO L78 Accepts]: Start accepts. Automaton has 2005 states and 6987 transitions. Word has length 27 [2022-01-28 15:39:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:44,699 INFO L470 AbstractCegarLoop]: Abstraction has 2005 states and 6987 transitions. [2022-01-28 15:39:44,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:44,699 INFO L276 IsEmpty]: Start isEmpty. Operand 2005 states and 6987 transitions. [2022-01-28 15:39:44,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:44,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:44,702 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:44,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:44,918 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,SelfDestructingSolverStorable33 [2022-01-28 15:39:44,918 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:44,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:44,918 INFO L85 PathProgramCache]: Analyzing trace with hash 970143219, now seen corresponding path program 4 times [2022-01-28 15:39:44,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:44,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614755996] [2022-01-28 15:39:44,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:44,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:44,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:44,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614755996] [2022-01-28 15:39:44,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614755996] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:44,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478373903] [2022-01-28 15:39:44,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:44,950 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:44,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:44,951 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) [2022-01-28 15:39:44,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 15:39:44,970 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:44,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:45,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:45,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478373903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:45,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:45,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-01-28 15:39:45,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433970729] [2022-01-28 15:39:45,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:45,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:39:45,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:39:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:39:45,108 INFO L87 Difference]: Start difference. First operand 2005 states and 6987 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:45,566 INFO L93 Difference]: Finished difference Result 4592 states and 14316 transitions. [2022-01-28 15:39:45,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:39:45,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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 27 [2022-01-28 15:39:45,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:45,575 INFO L225 Difference]: With dead ends: 4592 [2022-01-28 15:39:45,575 INFO L226 Difference]: Without dead ends: 4592 [2022-01-28 15:39:45,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=708, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:39:45,576 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 252 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:45,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 148 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4592 states. [2022-01-28 15:39:45,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4592 to 2181. [2022-01-28 15:39:45,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.5022935779816513) internal successors, (7635), 2180 states have internal predecessors, (7635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7635 transitions. [2022-01-28 15:39:45,642 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7635 transitions. Word has length 27 [2022-01-28 15:39:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:45,642 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7635 transitions. [2022-01-28 15:39:45,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 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) [2022-01-28 15:39:45,643 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7635 transitions. [2022-01-28 15:39:45,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:45,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:45,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:45,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-01-28 15:39:45,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-01-28 15:39:45,861 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:45,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1201755135, now seen corresponding path program 9 times [2022-01-28 15:39:45,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:45,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278320052] [2022-01-28 15:39:45,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:45,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:45,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:45,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278320052] [2022-01-28 15:39:45,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278320052] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147076147] [2022-01-28 15:39:45,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:45,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:45,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:45,901 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) [2022-01-28 15:39:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 15:39:45,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:39:45,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:45,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:45,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:46,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:46,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:46,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147076147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:46,079 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:46,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-01-28 15:39:46,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263211000] [2022-01-28 15:39:46,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:46,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:46,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:46,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:46,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:46,080 INFO L87 Difference]: Start difference. First operand 2181 states and 7635 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:46,800 INFO L93 Difference]: Finished difference Result 7070 states and 21694 transitions. [2022-01-28 15:39:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:39:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:46,814 INFO L225 Difference]: With dead ends: 7070 [2022-01-28 15:39:46,815 INFO L226 Difference]: Without dead ends: 7062 [2022-01-28 15:39:46,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:39:46,816 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 523 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:46,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 191 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:46,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7062 states. [2022-01-28 15:39:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7062 to 2191. [2022-01-28 15:39:46,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2191 states, 2190 states have (on average 3.491324200913242) internal successors, (7646), 2190 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2191 states to 2191 states and 7646 transitions. [2022-01-28 15:39:46,896 INFO L78 Accepts]: Start accepts. Automaton has 2191 states and 7646 transitions. Word has length 27 [2022-01-28 15:39:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:46,896 INFO L470 AbstractCegarLoop]: Abstraction has 2191 states and 7646 transitions. [2022-01-28 15:39:46,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2191 states and 7646 transitions. [2022-01-28 15:39:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:46,900 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:46,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:46,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:47,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:47,115 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:47,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:47,116 INFO L85 PathProgramCache]: Analyzing trace with hash 187766081, now seen corresponding path program 10 times [2022-01-28 15:39:47,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:47,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120097971] [2022-01-28 15:39:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:47,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:47,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:47,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120097971] [2022-01-28 15:39:47,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120097971] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:47,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132199840] [2022-01-28 15:39:47,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:47,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:47,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:47,157 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) [2022-01-28 15:39:47,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 15:39:47,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:47,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:47,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:47,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:47,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:47,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:47,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132199840] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:47,360 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:47,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:39:47,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637405323] [2022-01-28 15:39:47,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:47,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:39:47,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:47,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:39:47,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:39:47,361 INFO L87 Difference]: Start difference. First operand 2191 states and 7646 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:48,573 INFO L93 Difference]: Finished difference Result 7232 states and 21469 transitions. [2022-01-28 15:39:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-28 15:39:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:48,587 INFO L225 Difference]: With dead ends: 7232 [2022-01-28 15:39:48,587 INFO L226 Difference]: Without dead ends: 7232 [2022-01-28 15:39:48,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:39:48,588 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 710 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:48,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 303 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:39:48,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2022-01-28 15:39:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 2309. [2022-01-28 15:39:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.470103986135182) internal successors, (8009), 2308 states have internal predecessors, (8009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8009 transitions. [2022-01-28 15:39:48,666 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8009 transitions. Word has length 27 [2022-01-28 15:39:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:48,666 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8009 transitions. [2022-01-28 15:39:48,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8009 transitions. [2022-01-28 15:39:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:48,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:48,670 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:48,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:48,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-28 15:39:48,877 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:48,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1970415551, now seen corresponding path program 11 times [2022-01-28 15:39:48,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:48,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480561779] [2022-01-28 15:39:48,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:48,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:48,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:48,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480561779] [2022-01-28 15:39:48,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480561779] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:48,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833407592] [2022-01-28 15:39:48,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:48,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:48,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:48,911 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) [2022-01-28 15:39:48,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 15:39:48,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:39:48,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:48,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:48,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:49,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:49,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:49,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833407592] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:49,105 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:49,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:39:49,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530844525] [2022-01-28 15:39:49,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:49,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:39:49,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:49,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:39:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:39:49,106 INFO L87 Difference]: Start difference. First operand 2309 states and 8009 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:50,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:50,424 INFO L93 Difference]: Finished difference Result 7083 states and 21556 transitions. [2022-01-28 15:39:50,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-28 15:39:50,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:50,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:50,438 INFO L225 Difference]: With dead ends: 7083 [2022-01-28 15:39:50,438 INFO L226 Difference]: Without dead ends: 7075 [2022-01-28 15:39:50,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2890 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1646, Invalid=6010, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 15:39:50,440 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 589 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 589 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:50,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [589 Valid, 293 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:39:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7075 states. [2022-01-28 15:39:50,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7075 to 2309. [2022-01-28 15:39:50,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2309 states, 2308 states have (on average 3.468370883882149) internal successors, (8005), 2308 states have internal predecessors, (8005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:50,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 8005 transitions. [2022-01-28 15:39:50,519 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 8005 transitions. Word has length 27 [2022-01-28 15:39:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 2309 states and 8005 transitions. [2022-01-28 15:39:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 8005 transitions. [2022-01-28 15:39:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:50,523 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:50,523 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:50,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-01-28 15:39:50,723 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,SelfDestructingSolverStorable37 [2022-01-28 15:39:50,723 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:50,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:50,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1109408773, now seen corresponding path program 12 times [2022-01-28 15:39:50,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:50,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106531677] [2022-01-28 15:39:50,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:50,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:50,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:50,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106531677] [2022-01-28 15:39:50,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106531677] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:50,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162715454] [2022-01-28 15:39:50,755 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:50,755 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:50,756 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) [2022-01-28 15:39:50,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 15:39:50,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:39:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:50,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:50,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:50,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:50,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:50,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162715454] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:50,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:50,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:39:50,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990330202] [2022-01-28 15:39:50,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:50,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:39:50,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:50,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:39:50,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:39:50,956 INFO L87 Difference]: Start difference. First operand 2309 states and 8005 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:39:51,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:51,861 INFO L93 Difference]: Finished difference Result 6206 states and 18904 transitions. [2022-01-28 15:39:51,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:39:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) Word has length 27 [2022-01-28 15:39:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:51,872 INFO L225 Difference]: With dead ends: 6206 [2022-01-28 15:39:51,872 INFO L226 Difference]: Without dead ends: 6206 [2022-01-28 15:39:51,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:39:51,872 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 422 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:51,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 301 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:39:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6206 states. [2022-01-28 15:39:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6206 to 2335. [2022-01-28 15:39:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2335 states, 2334 states have (on average 3.4670094258783206) internal successors, (8092), 2334 states have internal predecessors, (8092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2335 states to 2335 states and 8092 transitions. [2022-01-28 15:39:51,936 INFO L78 Accepts]: Start accepts. Automaton has 2335 states and 8092 transitions. Word has length 27 [2022-01-28 15:39:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:51,936 INFO L470 AbstractCegarLoop]: Abstraction has 2335 states and 8092 transitions. [2022-01-28 15:39:51,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:39:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2335 states and 8092 transitions. [2022-01-28 15:39:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:51,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:51,940 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:51,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-01-28 15:39:52,142 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,SelfDestructingSolverStorable38 [2022-01-28 15:39:52,142 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2007542286, now seen corresponding path program 12 times [2022-01-28 15:39:52,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:52,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477657961] [2022-01-28 15:39:52,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:52,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:52,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:52,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:52,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477657961] [2022-01-28 15:39:52,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477657961] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:52,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053334921] [2022-01-28 15:39:52,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:52,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:52,185 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) [2022-01-28 15:39:52,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 15:39:52,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:39:52,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:52,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:52,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:52,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053334921] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:52,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:52,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:39:52,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125123408] [2022-01-28 15:39:52,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:52,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:39:52,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:52,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:39:52,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:39:52,355 INFO L87 Difference]: Start difference. First operand 2335 states and 8092 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:52,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:52,892 INFO L93 Difference]: Finished difference Result 6462 states and 20430 transitions. [2022-01-28 15:39:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:39:52,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-01-28 15:39:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:52,903 INFO L225 Difference]: With dead ends: 6462 [2022-01-28 15:39:52,903 INFO L226 Difference]: Without dead ends: 6462 [2022-01-28 15:39:52,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-28 15:39:52,904 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:52,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 169 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:52,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6462 states. [2022-01-28 15:39:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6462 to 2361. [2022-01-28 15:39:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 3.465677966101695) internal successors, (8179), 2360 states have internal predecessors, (8179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 8179 transitions. [2022-01-28 15:39:52,976 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 8179 transitions. Word has length 27 [2022-01-28 15:39:52,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:52,976 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 8179 transitions. [2022-01-28 15:39:52,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:52,976 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 8179 transitions. [2022-01-28 15:39:52,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:52,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:52,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:52,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:53,180 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,SelfDestructingSolverStorable39 [2022-01-28 15:39:53,181 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:53,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:53,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2095266658, now seen corresponding path program 13 times [2022-01-28 15:39:53,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:53,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944441391] [2022-01-28 15:39:53,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:53,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:53,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:53,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:53,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944441391] [2022-01-28 15:39:53,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944441391] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:53,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088455507] [2022-01-28 15:39:53,217 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:39:53,217 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:53,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:53,218 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) [2022-01-28 15:39:53,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 15:39:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:53,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:53,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:53,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:53,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:53,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088455507] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:53,381 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:53,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:39:53,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120851315] [2022-01-28 15:39:53,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:53,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:39:53,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:39:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:39:53,382 INFO L87 Difference]: Start difference. First operand 2361 states and 8179 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:54,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:54,015 INFO L93 Difference]: Finished difference Result 6568 states and 20814 transitions. [2022-01-28 15:39:54,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-28 15:39:54,015 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-01-28 15:39:54,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:54,027 INFO L225 Difference]: With dead ends: 6568 [2022-01-28 15:39:54,027 INFO L226 Difference]: Without dead ends: 6568 [2022-01-28 15:39:54,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:39:54,027 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 396 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:54,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 188 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:54,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6568 states. [2022-01-28 15:39:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6568 to 2497. [2022-01-28 15:39:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2496 states have (on average 3.4451121794871793) internal successors, (8599), 2496 states have internal predecessors, (8599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 8599 transitions. [2022-01-28 15:39:54,109 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 8599 transitions. Word has length 27 [2022-01-28 15:39:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:54,109 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 8599 transitions. [2022-01-28 15:39:54,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:54,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 8599 transitions. [2022-01-28 15:39:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:54,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:54,114 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:54,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-28 15:39:54,315 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,SelfDestructingSolverStorable40 [2022-01-28 15:39:54,315 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1473299244, now seen corresponding path program 14 times [2022-01-28 15:39:54,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:54,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257984009] [2022-01-28 15:39:54,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:54,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:54,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:54,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257984009] [2022-01-28 15:39:54,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257984009] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:54,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535720309] [2022-01-28 15:39:54,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:39:54,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:54,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:54,349 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) [2022-01-28 15:39:54,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 15:39:54,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:54,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:54,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:54,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535720309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:54,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:54,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-28 15:39:54,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814331132] [2022-01-28 15:39:54,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:54,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:54,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:54,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:54,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:54,512 INFO L87 Difference]: Start difference. First operand 2497 states and 8599 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:54,798 INFO L93 Difference]: Finished difference Result 5147 states and 16513 transitions. [2022-01-28 15:39:54,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:39:54,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:54,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:54,808 INFO L225 Difference]: With dead ends: 5147 [2022-01-28 15:39:54,808 INFO L226 Difference]: Without dead ends: 5147 [2022-01-28 15:39:54,808 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=574, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:39:54,809 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 291 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:54,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 183 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 354 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:54,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5147 states. [2022-01-28 15:39:54,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5147 to 2941. [2022-01-28 15:39:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2941 states, 2940 states have (on average 3.463265306122449) internal successors, (10182), 2940 states have internal predecessors, (10182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2941 states to 2941 states and 10182 transitions. [2022-01-28 15:39:54,880 INFO L78 Accepts]: Start accepts. Automaton has 2941 states and 10182 transitions. Word has length 27 [2022-01-28 15:39:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:54,880 INFO L470 AbstractCegarLoop]: Abstraction has 2941 states and 10182 transitions. [2022-01-28 15:39:54,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 2941 states and 10182 transitions. [2022-01-28 15:39:54,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:54,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:54,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:54,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-28 15:39:55,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:55,100 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 649769698, now seen corresponding path program 15 times [2022-01-28 15:39:55,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:55,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64705143] [2022-01-28 15:39:55,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:55,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:55,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:55,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64705143] [2022-01-28 15:39:55,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64705143] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:55,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182001790] [2022-01-28 15:39:55,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:39:55,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:55,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:55,131 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) [2022-01-28 15:39:55,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 15:39:55,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:39:55,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:55,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:55,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:55,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:55,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:55,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182001790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:55,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:55,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:39:55,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382880215] [2022-01-28 15:39:55,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:39:55,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:39:55,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:39:55,274 INFO L87 Difference]: Start difference. First operand 2941 states and 10182 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:55,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:55,827 INFO L93 Difference]: Finished difference Result 7126 states and 23054 transitions. [2022-01-28 15:39:55,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:39:55,828 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 27 [2022-01-28 15:39:55,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:55,843 INFO L225 Difference]: With dead ends: 7126 [2022-01-28 15:39:55,843 INFO L226 Difference]: Without dead ends: 7122 [2022-01-28 15:39:55,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:39:55,844 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 386 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:55,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 197 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:39:55,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7122 states. [2022-01-28 15:39:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7122 to 2923. [2022-01-28 15:39:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 3.4603011635865846) internal successors, (10111), 2922 states have internal predecessors, (10111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 10111 transitions. [2022-01-28 15:39:55,943 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 10111 transitions. Word has length 27 [2022-01-28 15:39:55,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:55,943 INFO L470 AbstractCegarLoop]: Abstraction has 2923 states and 10111 transitions. [2022-01-28 15:39:55,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-01-28 15:39:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 10111 transitions. [2022-01-28 15:39:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:55,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:55,948 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:55,966 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-28 15:39:56,149 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,SelfDestructingSolverStorable42 [2022-01-28 15:39:56,149 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:56,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1999520671, now seen corresponding path program 5 times [2022-01-28 15:39:56,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:56,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488267345] [2022-01-28 15:39:56,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:56,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:56,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488267345] [2022-01-28 15:39:56,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488267345] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:56,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777947505] [2022-01-28 15:39:56,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:39:56,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:56,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:56,177 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) [2022-01-28 15:39:56,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 15:39:56,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:39:56,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:56,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:56,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:56,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:56,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:56,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777947505] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:56,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:56,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:39:56,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214830040] [2022-01-28 15:39:56,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:56,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:56,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:56,346 INFO L87 Difference]: Start difference. First operand 2923 states and 10111 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:56,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:56,753 INFO L93 Difference]: Finished difference Result 4977 states and 15922 transitions. [2022-01-28 15:39:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:39:56,753 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:56,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:56,763 INFO L225 Difference]: With dead ends: 4977 [2022-01-28 15:39:56,763 INFO L226 Difference]: Without dead ends: 4962 [2022-01-28 15:39:56,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:39:56,763 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 350 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:56,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 117 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2022-01-28 15:39:56,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 3080. [2022-01-28 15:39:56,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 3.505034101981163) internal successors, (10792), 3079 states have internal predecessors, (10792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 10792 transitions. [2022-01-28 15:39:56,823 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 10792 transitions. Word has length 27 [2022-01-28 15:39:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:56,823 INFO L470 AbstractCegarLoop]: Abstraction has 3080 states and 10792 transitions. [2022-01-28 15:39:56,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 10792 transitions. [2022-01-28 15:39:56,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:56,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:56,827 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:56,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-28 15:39:57,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:57,028 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:57,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:57,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1750676451, now seen corresponding path program 6 times [2022-01-28 15:39:57,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:57,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200637225] [2022-01-28 15:39:57,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:57,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:57,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:57,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:57,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200637225] [2022-01-28 15:39:57,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200637225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:57,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127281894] [2022-01-28 15:39:57,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:39:57,068 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:57,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:57,069 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) [2022-01-28 15:39:57,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 15:39:57,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:39:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:39:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:57,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:57,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127281894] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:57,238 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:57,238 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-28 15:39:57,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498498983] [2022-01-28 15:39:57,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:57,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:39:57,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:39:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:39:57,239 INFO L87 Difference]: Start difference. First operand 3080 states and 10792 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:57,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:57,730 INFO L93 Difference]: Finished difference Result 5951 states and 18520 transitions. [2022-01-28 15:39:57,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:39:57,730 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:39:57,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:57,740 INFO L225 Difference]: With dead ends: 5951 [2022-01-28 15:39:57,740 INFO L226 Difference]: Without dead ends: 5951 [2022-01-28 15:39:57,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:39:57,741 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 360 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:57,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 139 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:39:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2022-01-28 15:39:57,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 2989. [2022-01-28 15:39:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2989 states, 2988 states have (on average 3.4745649263721554) internal successors, (10382), 2988 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:57,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2989 states to 2989 states and 10382 transitions. [2022-01-28 15:39:57,815 INFO L78 Accepts]: Start accepts. Automaton has 2989 states and 10382 transitions. Word has length 27 [2022-01-28 15:39:57,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:57,815 INFO L470 AbstractCegarLoop]: Abstraction has 2989 states and 10382 transitions. [2022-01-28 15:39:57,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:57,815 INFO L276 IsEmpty]: Start isEmpty. Operand 2989 states and 10382 transitions. [2022-01-28 15:39:57,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:57,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:57,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:57,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-28 15:39:58,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-01-28 15:39:58,020 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:39:58,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:39:58,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1579991646, now seen corresponding path program 16 times [2022-01-28 15:39:58,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:39:58,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426052413] [2022-01-28 15:39:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:39:58,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:39:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:39:58,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:58,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:39:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426052413] [2022-01-28 15:39:58,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426052413] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:39:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282164871] [2022-01-28 15:39:58,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:39:58,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:39:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:39:58,059 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) [2022-01-28 15:39:58,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 15:39:58,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:39:58,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:39:58,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:39:58,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:39:58,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:39:58,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:39:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:39:58,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282164871] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:39:58,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:39:58,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:39:58,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085530563] [2022-01-28 15:39:58,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:39:58,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:39:58,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:39:58,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:39:58,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:39:58,270 INFO L87 Difference]: Start difference. First operand 2989 states and 10382 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:39:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:39:59,626 INFO L93 Difference]: Finished difference Result 11830 states and 37070 transitions. [2022-01-28 15:39:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-28 15:39:59,627 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) Word has length 27 [2022-01-28 15:39:59,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:39:59,652 INFO L225 Difference]: With dead ends: 11830 [2022-01-28 15:39:59,652 INFO L226 Difference]: Without dead ends: 11830 [2022-01-28 15:39:59,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3243 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1772, Invalid=6418, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:39:59,653 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 706 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:39:59,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 311 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:39:59,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11830 states. [2022-01-28 15:39:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11830 to 3006. [2022-01-28 15:39:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3006 states, 3005 states have (on average 3.485524126455907) internal successors, (10474), 3005 states have internal predecessors, (10474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:39:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3006 states to 3006 states and 10474 transitions. [2022-01-28 15:39:59,806 INFO L78 Accepts]: Start accepts. Automaton has 3006 states and 10474 transitions. Word has length 27 [2022-01-28 15:39:59,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:39:59,806 INFO L470 AbstractCegarLoop]: Abstraction has 3006 states and 10474 transitions. [2022-01-28 15:39:59,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:39:59,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3006 states and 10474 transitions. [2022-01-28 15:39:59,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:39:59,812 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:39:59,812 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:39:59,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-28 15:40:00,013 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,SelfDestructingSolverStorable45 [2022-01-28 15:40:00,013 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:00,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:00,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1773892314, now seen corresponding path program 17 times [2022-01-28 15:40:00,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:00,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648980104] [2022-01-28 15:40:00,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:00,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:00,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:00,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:00,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648980104] [2022-01-28 15:40:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648980104] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568029971] [2022-01-28 15:40:00,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:00,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:00,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:00,052 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) [2022-01-28 15:40:00,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 15:40:00,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:40:00,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:00,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:00,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:00,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:00,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568029971] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:00,271 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:00,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-28 15:40:00,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400143974] [2022-01-28 15:40:00,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:00,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:40:00,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:40:00,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:00,274 INFO L87 Difference]: Start difference. First operand 3006 states and 10474 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:01,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:01,279 INFO L93 Difference]: Finished difference Result 9772 states and 30478 transitions. [2022-01-28 15:40:01,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-28 15:40:01,280 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) Word has length 27 [2022-01-28 15:40:01,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:01,299 INFO L225 Difference]: With dead ends: 9772 [2022-01-28 15:40:01,299 INFO L226 Difference]: Without dead ends: 9772 [2022-01-28 15:40:01,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1283, Invalid=3829, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 15:40:01,300 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 609 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:01,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 289 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:01,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2022-01-28 15:40:01,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 2975. [2022-01-28 15:40:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2975 states, 2974 states have (on average 3.4714189643577673) internal successors, (10324), 2974 states have internal predecessors, (10324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2975 states to 2975 states and 10324 transitions. [2022-01-28 15:40:01,417 INFO L78 Accepts]: Start accepts. Automaton has 2975 states and 10324 transitions. Word has length 27 [2022-01-28 15:40:01,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:01,417 INFO L470 AbstractCegarLoop]: Abstraction has 2975 states and 10324 transitions. [2022-01-28 15:40:01,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:01,417 INFO L276 IsEmpty]: Start isEmpty. Operand 2975 states and 10324 transitions. [2022-01-28 15:40:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:01,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:01,423 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:01,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-28 15:40:01,623 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,SelfDestructingSolverStorable46 [2022-01-28 15:40:01,623 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:01,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:01,624 INFO L85 PathProgramCache]: Analyzing trace with hash -225266257, now seen corresponding path program 7 times [2022-01-28 15:40:01,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:01,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937943091] [2022-01-28 15:40:01,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:01,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:01,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:01,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:01,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937943091] [2022-01-28 15:40:01,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937943091] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:01,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884478443] [2022-01-28 15:40:01,653 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:01,653 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:01,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:01,654 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) [2022-01-28 15:40:01,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 15:40:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:01,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:01,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:01,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884478443] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:01,788 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:01,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-28 15:40:01,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284666837] [2022-01-28 15:40:01,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:01,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:01,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:01,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:01,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:01,790 INFO L87 Difference]: Start difference. First operand 2975 states and 10324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-28 15:40:02,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:02,015 INFO L93 Difference]: Finished difference Result 4784 states and 15583 transitions. [2022-01-28 15:40:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:40:02,015 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-01-28 15:40:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:02,023 INFO L225 Difference]: With dead ends: 4784 [2022-01-28 15:40:02,023 INFO L226 Difference]: Without dead ends: 4747 [2022-01-28 15:40:02,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:40:02,024 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 170 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:02,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 101 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4747 states. [2022-01-28 15:40:02,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4747 to 3475. [2022-01-28 15:40:02,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3475 states, 3474 states have (on average 3.4905008635578585) internal successors, (12126), 3474 states have internal predecessors, (12126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:02,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3475 states to 3475 states and 12126 transitions. [2022-01-28 15:40:02,110 INFO L78 Accepts]: Start accepts. Automaton has 3475 states and 12126 transitions. Word has length 27 [2022-01-28 15:40:02,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:02,110 INFO L470 AbstractCegarLoop]: Abstraction has 3475 states and 12126 transitions. [2022-01-28 15:40:02,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-28 15:40:02,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3475 states and 12126 transitions. [2022-01-28 15:40:02,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:02,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:02,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:02,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:02,317 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,SelfDestructingSolverStorable47 [2022-01-28 15:40:02,317 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:02,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:02,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1380238831, now seen corresponding path program 8 times [2022-01-28 15:40:02,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:02,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677227859] [2022-01-28 15:40:02,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:02,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:02,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:02,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677227859] [2022-01-28 15:40:02,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677227859] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:02,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189817790] [2022-01-28 15:40:02,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:02,357 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:02,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:02,358 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) [2022-01-28 15:40:02,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 15:40:02,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:02,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:02,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:02,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:02,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:02,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:02,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189817790] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:02,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:02,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-28 15:40:02,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735960384] [2022-01-28 15:40:02,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:02,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:02,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:02,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:02,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:02,494 INFO L87 Difference]: Start difference. First operand 3475 states and 12126 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-28 15:40:02,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:02,767 INFO L93 Difference]: Finished difference Result 4950 states and 16086 transitions. [2022-01-28 15:40:02,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:40:02,767 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 27 [2022-01-28 15:40:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:02,776 INFO L225 Difference]: With dead ends: 4950 [2022-01-28 15:40:02,776 INFO L226 Difference]: Without dead ends: 4950 [2022-01-28 15:40:02,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:40:02,777 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 160 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:02,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 183 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:02,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4950 states. [2022-01-28 15:40:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4950 to 3463. [2022-01-28 15:40:02,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 3.4803581744656267) internal successors, (12049), 3462 states have internal predecessors, (12049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 12049 transitions. [2022-01-28 15:40:02,842 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 12049 transitions. Word has length 27 [2022-01-28 15:40:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:02,842 INFO L470 AbstractCegarLoop]: Abstraction has 3463 states and 12049 transitions. [2022-01-28 15:40:02,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2022-01-28 15:40:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 12049 transitions. [2022-01-28 15:40:02,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:02,848 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:02,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:02,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-28 15:40:03,055 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,SelfDestructingSolverStorable48 [2022-01-28 15:40:03,056 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:03,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1293927831, now seen corresponding path program 13 times [2022-01-28 15:40:03,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:03,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984142906] [2022-01-28 15:40:03,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:03,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:03,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984142906] [2022-01-28 15:40:03,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984142906] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:03,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765697158] [2022-01-28 15:40:03,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:03,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:03,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:03,100 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) [2022-01-28 15:40:03,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 15:40:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:03,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:03,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:03,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:03,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:03,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765697158] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:03,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:03,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:40:03,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348212548] [2022-01-28 15:40:03,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:03,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:40:03,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:03,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:40:03,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:03,356 INFO L87 Difference]: Start difference. First operand 3463 states and 12049 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:04,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:04,770 INFO L93 Difference]: Finished difference Result 13772 states and 44128 transitions. [2022-01-28 15:40:04,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-28 15:40:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) Word has length 27 [2022-01-28 15:40:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:04,810 INFO L225 Difference]: With dead ends: 13772 [2022-01-28 15:40:04,810 INFO L226 Difference]: Without dead ends: 13772 [2022-01-28 15:40:04,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1770, Invalid=6602, Unknown=0, NotChecked=0, Total=8372 [2022-01-28 15:40:04,812 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 656 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:04,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 267 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:40:04,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13772 states. [2022-01-28 15:40:04,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13772 to 4598. [2022-01-28 15:40:04,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.5729823798129217) internal successors, (16425), 4597 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16425 transitions. [2022-01-28 15:40:04,976 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16425 transitions. Word has length 27 [2022-01-28 15:40:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:04,976 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16425 transitions. [2022-01-28 15:40:04,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:04,976 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16425 transitions. [2022-01-28 15:40:04,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:04,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:04,983 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:04,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-28 15:40:05,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 15:40:05,187 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:05,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1100027163, now seen corresponding path program 14 times [2022-01-28 15:40:05,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:05,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627620622] [2022-01-28 15:40:05,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:05,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:05,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:05,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627620622] [2022-01-28 15:40:05,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627620622] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:05,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252112976] [2022-01-28 15:40:05,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:05,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:05,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:05,220 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) [2022-01-28 15:40:05,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 15:40:05,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:05,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:05,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:05,440 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:05,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252112976] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:05,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:05,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:40:05,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823586319] [2022-01-28 15:40:05,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:05,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:40:05,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:05,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:40:05,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:05,441 INFO L87 Difference]: Start difference. First operand 4598 states and 16425 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:06,629 INFO L93 Difference]: Finished difference Result 11895 states and 38033 transitions. [2022-01-28 15:40:06,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-28 15:40:06,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) Word has length 27 [2022-01-28 15:40:06,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:06,655 INFO L225 Difference]: With dead ends: 11895 [2022-01-28 15:40:06,655 INFO L226 Difference]: Without dead ends: 11895 [2022-01-28 15:40:06,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1542, Invalid=4938, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:40:06,657 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 699 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:06,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [699 Valid, 269 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11895 states. [2022-01-28 15:40:06,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11895 to 4597. [2022-01-28 15:40:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 3.571366405570061) internal successors, (16414), 4596 states have internal predecessors, (16414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 16414 transitions. [2022-01-28 15:40:06,813 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 16414 transitions. Word has length 27 [2022-01-28 15:40:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:06,814 INFO L470 AbstractCegarLoop]: Abstraction has 4597 states and 16414 transitions. [2022-01-28 15:40:06,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 16 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) [2022-01-28 15:40:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 16414 transitions. [2022-01-28 15:40:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:06,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:06,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:06,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:07,024 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,SelfDestructingSolverStorable50 [2022-01-28 15:40:07,024 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:07,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1526676838, now seen corresponding path program 15 times [2022-01-28 15:40:07,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:07,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869375927] [2022-01-28 15:40:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:07,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:07,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:07,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869375927] [2022-01-28 15:40:07,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869375927] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:07,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140308255] [2022-01-28 15:40:07,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:07,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:07,058 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) [2022-01-28 15:40:07,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 15:40:07,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-28 15:40:07,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:07,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:07,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:07,148 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:07,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:07,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140308255] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:07,226 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:07,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-28 15:40:07,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403186657] [2022-01-28 15:40:07,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:07,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:40:07,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:07,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:40:07,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:40:07,227 INFO L87 Difference]: Start difference. First operand 4597 states and 16414 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:07,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:07,421 INFO L93 Difference]: Finished difference Result 6491 states and 22125 transitions. [2022-01-28 15:40:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:40:07,421 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:07,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:07,433 INFO L225 Difference]: With dead ends: 6491 [2022-01-28 15:40:07,433 INFO L226 Difference]: Without dead ends: 6480 [2022-01-28 15:40:07,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:40:07,434 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 230 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:07,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 105 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2022-01-28 15:40:07,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 4687. [2022-01-28 15:40:07,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4687 states, 4686 states have (on average 3.5742637644046096) internal successors, (16749), 4686 states have internal predecessors, (16749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:07,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4687 states to 4687 states and 16749 transitions. [2022-01-28 15:40:07,525 INFO L78 Accepts]: Start accepts. Automaton has 4687 states and 16749 transitions. Word has length 27 [2022-01-28 15:40:07,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:07,525 INFO L470 AbstractCegarLoop]: Abstraction has 4687 states and 16749 transitions. [2022-01-28 15:40:07,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:07,525 INFO L276 IsEmpty]: Start isEmpty. Operand 4687 states and 16749 transitions. [2022-01-28 15:40:07,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:07,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:07,532 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:07,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-28 15:40:07,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:07,732 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:07,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1074696534, now seen corresponding path program 16 times [2022-01-28 15:40:07,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:07,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281223265] [2022-01-28 15:40:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:07,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:07,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:07,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281223265] [2022-01-28 15:40:07,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281223265] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:07,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722364363] [2022-01-28 15:40:07,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:07,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:07,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:07,763 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) [2022-01-28 15:40:07,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:07,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:07,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:07,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:07,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 15:40:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:07,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:07,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722364363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:07,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:07,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-01-28 15:40:07,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501829012] [2022-01-28 15:40:07,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:07,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-28 15:40:07,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-28 15:40:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-01-28 15:40:07,938 INFO L87 Difference]: Start difference. First operand 4687 states and 16749 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:08,302 INFO L93 Difference]: Finished difference Result 7410 states and 24751 transitions. [2022-01-28 15:40:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:40:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:08,322 INFO L225 Difference]: With dead ends: 7410 [2022-01-28 15:40:08,322 INFO L226 Difference]: Without dead ends: 7410 [2022-01-28 15:40:08,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=525, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:40:08,323 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 262 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:08,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 156 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7410 states. [2022-01-28 15:40:08,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7410 to 4582. [2022-01-28 15:40:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4582 states, 4581 states have (on average 3.563632394673652) internal successors, (16325), 4581 states have internal predecessors, (16325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:08,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 16325 transitions. [2022-01-28 15:40:08,428 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 16325 transitions. Word has length 27 [2022-01-28 15:40:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:08,428 INFO L470 AbstractCegarLoop]: Abstraction has 4582 states and 16325 transitions. [2022-01-28 15:40:08,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 16325 transitions. [2022-01-28 15:40:08,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:08,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:08,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:08,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-01-28 15:40:08,635 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,SelfDestructingSolverStorable52 [2022-01-28 15:40:08,635 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:08,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:08,636 INFO L85 PathProgramCache]: Analyzing trace with hash 728117397, now seen corresponding path program 17 times [2022-01-28 15:40:08,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:08,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659291959] [2022-01-28 15:40:08,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:08,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:08,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:08,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:08,666 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659291959] [2022-01-28 15:40:08,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659291959] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:08,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209663740] [2022-01-28 15:40:08,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:08,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:08,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:08,667 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) [2022-01-28 15:40:08,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 15:40:08,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:40:08,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:08,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:08,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:08,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:08,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:08,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209663740] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:08,852 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:08,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-01-28 15:40:08,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826459120] [2022-01-28 15:40:08,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:08,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:40:08,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:08,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:40:08,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:40:08,853 INFO L87 Difference]: Start difference. First operand 4582 states and 16325 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:09,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:09,961 INFO L93 Difference]: Finished difference Result 12614 states and 40253 transitions. [2022-01-28 15:40:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-28 15:40:09,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:09,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:09,993 INFO L225 Difference]: With dead ends: 12614 [2022-01-28 15:40:09,993 INFO L226 Difference]: Without dead ends: 12614 [2022-01-28 15:40:09,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-01-28 15:40:09,994 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 549 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:09,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [549 Valid, 215 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:10,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12614 states. [2022-01-28 15:40:10,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12614 to 4598. [2022-01-28 15:40:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.565151185555797) internal successors, (16389), 4597 states have internal predecessors, (16389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:10,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16389 transitions. [2022-01-28 15:40:10,133 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16389 transitions. Word has length 27 [2022-01-28 15:40:10,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:10,133 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16389 transitions. [2022-01-28 15:40:10,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:10,133 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16389 transitions. [2022-01-28 15:40:10,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:10,139 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:10,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:10,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-28 15:40:10,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:10,341 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:10,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:10,341 INFO L85 PathProgramCache]: Analyzing trace with hash 538899099, now seen corresponding path program 18 times [2022-01-28 15:40:10,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:10,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132712666] [2022-01-28 15:40:10,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:10,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:10,374 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:10,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132712666] [2022-01-28 15:40:10,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132712666] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:10,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986541418] [2022-01-28 15:40:10,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:10,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:10,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:10,375 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) [2022-01-28 15:40:10,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 15:40:10,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:40:10,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:10,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:10,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:10,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:10,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986541418] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:10,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:10,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 14 [2022-01-28 15:40:10,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065377270] [2022-01-28 15:40:10,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:10,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-28 15:40:10,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-28 15:40:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-01-28 15:40:10,541 INFO L87 Difference]: Start difference. First operand 4598 states and 16389 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:11,417 INFO L93 Difference]: Finished difference Result 12094 states and 38855 transitions. [2022-01-28 15:40:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-28 15:40:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:11,446 INFO L225 Difference]: With dead ends: 12094 [2022-01-28 15:40:11,447 INFO L226 Difference]: Without dead ends: 12086 [2022-01-28 15:40:11,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=888, Invalid=3272, Unknown=0, NotChecked=0, Total=4160 [2022-01-28 15:40:11,448 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 610 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:11,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 210 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12086 states. [2022-01-28 15:40:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12086 to 4592. [2022-01-28 15:40:11,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-01-28 15:40:11,607 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-01-28 15:40:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:11,607 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-01-28 15:40:11,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-01-28 15:40:11,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:11,614 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:11,614 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:11,630 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-28 15:40:11,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:11,815 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:11,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1928420315, now seen corresponding path program 19 times [2022-01-28 15:40:11,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:11,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558773523] [2022-01-28 15:40:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:11,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:11,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:11,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:11,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558773523] [2022-01-28 15:40:11,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558773523] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:11,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473124800] [2022-01-28 15:40:11,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:11,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:11,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:11,873 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) [2022-01-28 15:40:11,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 15:40:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:11,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:11,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:12,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473124800] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:12,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:12,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:40:12,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125824844] [2022-01-28 15:40:12,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:12,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:40:12,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:40:12,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:12,066 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:13,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:13,083 INFO L93 Difference]: Finished difference Result 10329 states and 32586 transitions. [2022-01-28 15:40:13,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-28 15:40:13,084 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:13,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:13,107 INFO L225 Difference]: With dead ends: 10329 [2022-01-28 15:40:13,107 INFO L226 Difference]: Without dead ends: 10329 [2022-01-28 15:40:13,108 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1959 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1236, Invalid=3876, Unknown=0, NotChecked=0, Total=5112 [2022-01-28 15:40:13,108 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 843 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:13,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 244 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:13,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10329 states. [2022-01-28 15:40:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10329 to 4598. [2022-01-28 15:40:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 3.563845986512943) internal successors, (16383), 4597 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:13,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 16383 transitions. [2022-01-28 15:40:13,251 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 16383 transitions. Word has length 27 [2022-01-28 15:40:13,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:13,252 INFO L470 AbstractCegarLoop]: Abstraction has 4598 states and 16383 transitions. [2022-01-28 15:40:13,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:13,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 16383 transitions. [2022-01-28 15:40:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:13,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:13,258 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:13,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-28 15:40:13,458 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,SelfDestructingSolverStorable55 [2022-01-28 15:40:13,459 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash -583897511, now seen corresponding path program 20 times [2022-01-28 15:40:13,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:13,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935902601] [2022-01-28 15:40:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:13,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:13,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:13,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935902601] [2022-01-28 15:40:13,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935902601] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:13,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902916020] [2022-01-28 15:40:13,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:13,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:13,492 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) [2022-01-28 15:40:13,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 15:40:13,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:13,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:13,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:13,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:13,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:13,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902916020] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:13,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:13,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 16 [2022-01-28 15:40:13,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720142621] [2022-01-28 15:40:13,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:13,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-28 15:40:13,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-28 15:40:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:13,677 INFO L87 Difference]: Start difference. First operand 4598 states and 16383 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:14,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:14,917 INFO L93 Difference]: Finished difference Result 10595 states and 33851 transitions. [2022-01-28 15:40:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-28 15:40:14,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:14,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:14,970 INFO L225 Difference]: With dead ends: 10595 [2022-01-28 15:40:14,970 INFO L226 Difference]: Without dead ends: 10587 [2022-01-28 15:40:14,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1514, Invalid=5968, Unknown=0, NotChecked=0, Total=7482 [2022-01-28 15:40:14,970 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 743 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:14,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 262 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:40:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10587 states. [2022-01-28 15:40:15,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10587 to 4592. [2022-01-28 15:40:15,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4592 states, 4591 states have (on average 3.5630581572642126) internal successors, (16358), 4591 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:15,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4592 states to 4592 states and 16358 transitions. [2022-01-28 15:40:15,160 INFO L78 Accepts]: Start accepts. Automaton has 4592 states and 16358 transitions. Word has length 27 [2022-01-28 15:40:15,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:15,160 INFO L470 AbstractCegarLoop]: Abstraction has 4592 states and 16358 transitions. [2022-01-28 15:40:15,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:15,160 INFO L276 IsEmpty]: Start isEmpty. Operand 4592 states and 16358 transitions. [2022-01-28 15:40:15,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:15,166 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:15,166 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:15,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-01-28 15:40:15,367 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,SelfDestructingSolverStorable56 [2022-01-28 15:40:15,367 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1207160328, now seen corresponding path program 21 times [2022-01-28 15:40:15,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:15,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801690031] [2022-01-28 15:40:15,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:15,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:15,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:15,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801690031] [2022-01-28 15:40:15,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801690031] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:15,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645313755] [2022-01-28 15:40:15,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:15,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:15,398 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) [2022-01-28 15:40:15,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 15:40:15,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:40:15,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:15,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:15,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:15,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:15,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645313755] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:15,543 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:15,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-01-28 15:40:15,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48803887] [2022-01-28 15:40:15,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:15,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:15,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:15,544 INFO L87 Difference]: Start difference. First operand 4592 states and 16358 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:15,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:15,807 INFO L93 Difference]: Finished difference Result 7411 states and 24660 transitions. [2022-01-28 15:40:15,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:40:15,807 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:15,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:15,822 INFO L225 Difference]: With dead ends: 7411 [2022-01-28 15:40:15,822 INFO L226 Difference]: Without dead ends: 7411 [2022-01-28 15:40:15,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=232, Invalid=470, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:40:15,822 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 203 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:15,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 167 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7411 states. [2022-01-28 15:40:15,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7411 to 5288. [2022-01-28 15:40:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5288 states, 5287 states have (on average 3.5496500851144317) internal successors, (18767), 5287 states have internal predecessors, (18767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5288 states to 5288 states and 18767 transitions. [2022-01-28 15:40:15,926 INFO L78 Accepts]: Start accepts. Automaton has 5288 states and 18767 transitions. Word has length 27 [2022-01-28 15:40:15,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:15,926 INFO L470 AbstractCegarLoop]: Abstraction has 5288 states and 18767 transitions. [2022-01-28 15:40:15,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:15,926 INFO L276 IsEmpty]: Start isEmpty. Operand 5288 states and 18767 transitions. [2022-01-28 15:40:15,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:15,934 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:15,934 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:15,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-28 15:40:16,134 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,SelfDestructingSolverStorable57 [2022-01-28 15:40:16,134 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:16,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:16,135 INFO L85 PathProgramCache]: Analyzing trace with hash 459370969, now seen corresponding path program 22 times [2022-01-28 15:40:16,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:16,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726162586] [2022-01-28 15:40:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:16,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:16,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:16,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726162586] [2022-01-28 15:40:16,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726162586] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:16,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308908984] [2022-01-28 15:40:16,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:16,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:16,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:16,167 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) [2022-01-28 15:40:16,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 15:40:16,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:16,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:16,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:16,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:16,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:16,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:16,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308908984] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:16,339 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:16,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:40:16,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242439710] [2022-01-28 15:40:16,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:16,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:40:16,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:16,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:40:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:40:16,339 INFO L87 Difference]: Start difference. First operand 5288 states and 18767 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:16,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:16,981 INFO L93 Difference]: Finished difference Result 12338 states and 40499 transitions. [2022-01-28 15:40:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-28 15:40:16,981 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:17,012 INFO L225 Difference]: With dead ends: 12338 [2022-01-28 15:40:17,012 INFO L226 Difference]: Without dead ends: 12338 [2022-01-28 15:40:17,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=600, Invalid=1950, Unknown=0, NotChecked=0, Total=2550 [2022-01-28 15:40:17,013 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 484 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:17,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 160 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:40:17,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12338 states. [2022-01-28 15:40:17,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12338 to 6120. [2022-01-28 15:40:17,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6120 states, 6119 states have (on average 3.566268998202321) internal successors, (21822), 6119 states have internal predecessors, (21822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6120 states to 6120 states and 21822 transitions. [2022-01-28 15:40:17,181 INFO L78 Accepts]: Start accepts. Automaton has 6120 states and 21822 transitions. Word has length 27 [2022-01-28 15:40:17,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:17,181 INFO L470 AbstractCegarLoop]: Abstraction has 6120 states and 21822 transitions. [2022-01-28 15:40:17,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,182 INFO L276 IsEmpty]: Start isEmpty. Operand 6120 states and 21822 transitions. [2022-01-28 15:40:17,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:17,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:17,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:17,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:17,402 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,SelfDestructingSolverStorable58 [2022-01-28 15:40:17,403 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:17,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:17,403 INFO L85 PathProgramCache]: Analyzing trace with hash 270152671, now seen corresponding path program 23 times [2022-01-28 15:40:17,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:17,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613937285] [2022-01-28 15:40:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:17,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:17,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:17,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:17,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613937285] [2022-01-28 15:40:17,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613937285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:17,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301070309] [2022-01-28 15:40:17,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:17,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:17,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:17,435 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) [2022-01-28 15:40:17,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 15:40:17,456 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:40:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:17,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:17,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:17,600 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:17,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301070309] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:17,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:17,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:40:17,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298804473] [2022-01-28 15:40:17,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:17,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:40:17,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:40:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:40:17,601 INFO L87 Difference]: Start difference. First operand 6120 states and 21822 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,208 INFO L93 Difference]: Finished difference Result 11967 states and 39549 transitions. [2022-01-28 15:40:18,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-28 15:40:18,209 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:18,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,239 INFO L225 Difference]: With dead ends: 11967 [2022-01-28 15:40:18,239 INFO L226 Difference]: Without dead ends: 11959 [2022-01-28 15:40:18,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=440, Invalid=1452, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:40:18,240 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 479 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 165 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:40:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11959 states. [2022-01-28 15:40:18,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11959 to 6112. [2022-01-28 15:40:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6112 states, 6111 states have (on average 3.5660284732449683) internal successors, (21792), 6111 states have internal predecessors, (21792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6112 states to 6112 states and 21792 transitions. [2022-01-28 15:40:18,442 INFO L78 Accepts]: Start accepts. Automaton has 6112 states and 21792 transitions. Word has length 27 [2022-01-28 15:40:18,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,442 INFO L470 AbstractCegarLoop]: Abstraction has 6112 states and 21792 transitions. [2022-01-28 15:40:18,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,442 INFO L276 IsEmpty]: Start isEmpty. Operand 6112 states and 21792 transitions. [2022-01-28 15:40:18,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:18,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-28 15:40:18,651 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,SelfDestructingSolverStorable59 [2022-01-28 15:40:18,651 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -941485803, now seen corresponding path program 9 times [2022-01-28 15:40:18,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064123388] [2022-01-28 15:40:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:18,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064123388] [2022-01-28 15:40:18,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064123388] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:18,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194114119] [2022-01-28 15:40:18,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:18,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:18,692 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) [2022-01-28 15:40:18,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 15:40:18,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:40:18,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:18,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:18,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:18,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:18,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:18,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194114119] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:18,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:18,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-01-28 15:40:18,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533233678] [2022-01-28 15:40:18,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:18,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:18,824 INFO L87 Difference]: Start difference. First operand 6112 states and 21792 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-01-28 15:40:19,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:19,033 INFO L93 Difference]: Finished difference Result 7455 states and 25610 transitions. [2022-01-28 15:40:19,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:40:19,034 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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 27 [2022-01-28 15:40:19,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:19,049 INFO L225 Difference]: With dead ends: 7455 [2022-01-28 15:40:19,049 INFO L226 Difference]: Without dead ends: 7455 [2022-01-28 15:40:19,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:40:19,050 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 138 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:19,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 102 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:19,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7455 states. [2022-01-28 15:40:19,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7455 to 6153. [2022-01-28 15:40:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6153 states, 6152 states have (on average 3.5640442132639794) internal successors, (21926), 6152 states have internal predecessors, (21926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6153 states to 6153 states and 21926 transitions. [2022-01-28 15:40:19,172 INFO L78 Accepts]: Start accepts. Automaton has 6153 states and 21926 transitions. Word has length 27 [2022-01-28 15:40:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 6153 states and 21926 transitions. [2022-01-28 15:40:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 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) [2022-01-28 15:40:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 6153 states and 21926 transitions. [2022-01-28 15:40:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:19,182 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:19,182 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:19,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:19,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:19,395 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:19,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:19,396 INFO L85 PathProgramCache]: Analyzing trace with hash 913534931, now seen corresponding path program 24 times [2022-01-28 15:40:19,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:19,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072065620] [2022-01-28 15:40:19,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:19,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:19,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072065620] [2022-01-28 15:40:19,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072065620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:19,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716020354] [2022-01-28 15:40:19,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:19,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:19,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:19,425 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) [2022-01-28 15:40:19,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 15:40:19,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:40:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:19,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:19,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:19,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:19,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716020354] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:19,589 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:19,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-28 15:40:19,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189022688] [2022-01-28 15:40:19,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:19,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:40:19,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:40:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:40:19,590 INFO L87 Difference]: Start difference. First operand 6153 states and 21926 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:20,097 INFO L93 Difference]: Finished difference Result 11867 states and 39346 transitions. [2022-01-28 15:40:20,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:40:20,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:20,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:20,126 INFO L225 Difference]: With dead ends: 11867 [2022-01-28 15:40:20,127 INFO L226 Difference]: Without dead ends: 11835 [2022-01-28 15:40:20,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=394, Invalid=1246, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 15:40:20,128 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 553 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:20,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 120 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:40:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11835 states. [2022-01-28 15:40:20,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11835 to 6181. [2022-01-28 15:40:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6181 states, 6180 states have (on average 3.5611650485436894) internal successors, (22008), 6180 states have internal predecessors, (22008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6181 states to 6181 states and 22008 transitions. [2022-01-28 15:40:20,318 INFO L78 Accepts]: Start accepts. Automaton has 6181 states and 22008 transitions. Word has length 27 [2022-01-28 15:40:20,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:20,318 INFO L470 AbstractCegarLoop]: Abstraction has 6181 states and 22008 transitions. [2022-01-28 15:40:20,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,319 INFO L276 IsEmpty]: Start isEmpty. Operand 6181 states and 22008 transitions. [2022-01-28 15:40:20,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:20,327 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:20,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:20,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-01-28 15:40:20,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:20,528 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:20,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:20,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1225890903, now seen corresponding path program 25 times [2022-01-28 15:40:20,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373472922] [2022-01-28 15:40:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:20,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373472922] [2022-01-28 15:40:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373472922] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:20,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451707142] [2022-01-28 15:40:20,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:20,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:20,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:20,563 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) [2022-01-28 15:40:20,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 15:40:20,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:20,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:20,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:20,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451707142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:20,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:20,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:40:20,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931658580] [2022-01-28 15:40:20,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:20,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:40:20,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:20,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:40:20,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:20,778 INFO L87 Difference]: Start difference. First operand 6181 states and 22008 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:22,126 INFO L93 Difference]: Finished difference Result 11509 states and 36905 transitions. [2022-01-28 15:40:22,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-28 15:40:22,128 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:22,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:22,155 INFO L225 Difference]: With dead ends: 11509 [2022-01-28 15:40:22,155 INFO L226 Difference]: Without dead ends: 11509 [2022-01-28 15:40:22,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1502, Invalid=5808, Unknown=0, NotChecked=0, Total=7310 [2022-01-28 15:40:22,156 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 779 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 779 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:22,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [779 Valid, 343 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:40:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11509 states. [2022-01-28 15:40:22,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11509 to 6427. [2022-01-28 15:40:22,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 3.541083099906629) internal successors, (22755), 6426 states have internal predecessors, (22755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 22755 transitions. [2022-01-28 15:40:22,343 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 22755 transitions. Word has length 27 [2022-01-28 15:40:22,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:22,344 INFO L470 AbstractCegarLoop]: Abstraction has 6427 states and 22755 transitions. [2022-01-28 15:40:22,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,344 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 22755 transitions. [2022-01-28 15:40:22,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:22,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:22,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:22,369 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-01-28 15:40:22,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:22,563 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1286426923, now seen corresponding path program 26 times [2022-01-28 15:40:22,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:22,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214703965] [2022-01-28 15:40:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:22,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:22,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214703965] [2022-01-28 15:40:22,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214703965] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:22,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036260896] [2022-01-28 15:40:22,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:22,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:22,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:22,595 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) [2022-01-28 15:40:22,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 15:40:22,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:22,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:22,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:22,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:22,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:22,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036260896] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:22,786 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:22,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-28 15:40:22,786 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597456161] [2022-01-28 15:40:22,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:22,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:40:22,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:40:22,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:22,786 INFO L87 Difference]: Start difference. First operand 6427 states and 22755 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:24,091 INFO L93 Difference]: Finished difference Result 11437 states and 37488 transitions. [2022-01-28 15:40:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-28 15:40:24,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:24,117 INFO L225 Difference]: With dead ends: 11437 [2022-01-28 15:40:24,118 INFO L226 Difference]: Without dead ends: 11429 [2022-01-28 15:40:24,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2795 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1456, Invalid=6200, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 15:40:24,118 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 789 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:24,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [789 Valid, 241 Invalid, 1070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-28 15:40:24,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2022-01-28 15:40:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 6417. [2022-01-28 15:40:24,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6416 states have (on average 3.5395885286783044) internal successors, (22710), 6416 states have internal predecessors, (22710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 22710 transitions. [2022-01-28 15:40:24,292 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 22710 transitions. Word has length 27 [2022-01-28 15:40:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:24,293 INFO L470 AbstractCegarLoop]: Abstraction has 6417 states and 22710 transitions. [2022-01-28 15:40:24,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 22710 transitions. [2022-01-28 15:40:24,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:24,302 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:24,302 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:24,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-28 15:40:24,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:24,502 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:24,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:24,503 INFO L85 PathProgramCache]: Analyzing trace with hash -2131398375, now seen corresponding path program 27 times [2022-01-28 15:40:24,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:24,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805462351] [2022-01-28 15:40:24,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:24,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:24,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:24,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:24,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805462351] [2022-01-28 15:40:24,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805462351] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:24,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931880843] [2022-01-28 15:40:24,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:24,534 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:24,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:24,535 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) [2022-01-28 15:40:24,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 15:40:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:40:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:24,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:24,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:24,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:24,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:24,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931880843] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:24,708 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:24,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:40:24,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543367778] [2022-01-28 15:40:24,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:24,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:40:24,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:24,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:40:24,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:40:24,708 INFO L87 Difference]: Start difference. First operand 6417 states and 22710 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:40:25,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:25,690 INFO L93 Difference]: Finished difference Result 10978 states and 36562 transitions. [2022-01-28 15:40:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 15:40:25,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) Word has length 27 [2022-01-28 15:40:25,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:25,714 INFO L225 Difference]: With dead ends: 10978 [2022-01-28 15:40:25,714 INFO L226 Difference]: Without dead ends: 10946 [2022-01-28 15:40:25,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1548 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=932, Invalid=3624, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:40:25,716 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 626 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:25,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [626 Valid, 210 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:40:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10946 states. [2022-01-28 15:40:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10946 to 6457. [2022-01-28 15:40:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6457 states, 6456 states have (on average 3.5353159851301115) internal successors, (22824), 6456 states have internal predecessors, (22824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:25,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6457 states to 6457 states and 22824 transitions. [2022-01-28 15:40:25,942 INFO L78 Accepts]: Start accepts. Automaton has 6457 states and 22824 transitions. Word has length 27 [2022-01-28 15:40:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:25,942 INFO L470 AbstractCegarLoop]: Abstraction has 6457 states and 22824 transitions. [2022-01-28 15:40:25,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:40:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 6457 states and 22824 transitions. [2022-01-28 15:40:25,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:25,951 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:25,951 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:25,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:26,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-01-28 15:40:26,152 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1828165507, now seen corresponding path program 28 times [2022-01-28 15:40:26,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162039534] [2022-01-28 15:40:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:26,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:26,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162039534] [2022-01-28 15:40:26,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162039534] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:26,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921740461] [2022-01-28 15:40:26,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:26,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:26,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:26,186 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) [2022-01-28 15:40:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 15:40:26,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:26,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:26,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:26,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:26,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921740461] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:26,368 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:26,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-28 15:40:26,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061746922] [2022-01-28 15:40:26,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:26,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:40:26,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:40:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:40:26,371 INFO L87 Difference]: Start difference. First operand 6457 states and 22824 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:40:26,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:26,971 INFO L93 Difference]: Finished difference Result 9242 states and 30901 transitions. [2022-01-28 15:40:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-28 15:40:26,971 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) Word has length 27 [2022-01-28 15:40:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:26,990 INFO L225 Difference]: With dead ends: 9242 [2022-01-28 15:40:26,990 INFO L226 Difference]: Without dead ends: 9242 [2022-01-28 15:40:26,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=501, Invalid=1569, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:40:26,991 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 310 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:26,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 196 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 621 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:40:26,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9242 states. [2022-01-28 15:40:27,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9242 to 6587. [2022-01-28 15:40:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 3.5252049802611602) internal successors, (23217), 6586 states have internal predecessors, (23217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 23217 transitions. [2022-01-28 15:40:27,141 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 23217 transitions. Word has length 27 [2022-01-28 15:40:27,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:27,141 INFO L470 AbstractCegarLoop]: Abstraction has 6587 states and 23217 transitions. [2022-01-28 15:40:27,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 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) [2022-01-28 15:40:27,141 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 23217 transitions. [2022-01-28 15:40:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:27,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:27,151 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:27,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-28 15:40:27,351 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,SelfDestructingSolverStorable65 [2022-01-28 15:40:27,352 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:27,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:27,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1881628206, now seen corresponding path program 18 times [2022-01-28 15:40:27,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:27,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335248704] [2022-01-28 15:40:27,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:27,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:27,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335248704] [2022-01-28 15:40:27,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335248704] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:27,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748308993] [2022-01-28 15:40:27,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:27,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:27,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:27,392 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) [2022-01-28 15:40:27,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 15:40:27,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:40:27,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:27,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:27,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:27,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:27,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:27,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748308993] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:27,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:27,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-28 15:40:27,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793750856] [2022-01-28 15:40:27,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:27,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:27,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:27,562 INFO L87 Difference]: Start difference. First operand 6587 states and 23217 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-01-28 15:40:27,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:27,984 INFO L93 Difference]: Finished difference Result 11132 states and 37515 transitions. [2022-01-28 15:40:27,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:40:27,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-01-28 15:40:27,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:28,010 INFO L225 Difference]: With dead ends: 11132 [2022-01-28 15:40:28,010 INFO L226 Difference]: Without dead ends: 11132 [2022-01-28 15:40:28,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:40:28,011 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 223 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:28,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 131 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11132 states. [2022-01-28 15:40:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11132 to 6717. [2022-01-28 15:40:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6717 states, 6716 states have (on average 3.5132519356759975) internal successors, (23595), 6716 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:28,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6717 states to 6717 states and 23595 transitions. [2022-01-28 15:40:28,176 INFO L78 Accepts]: Start accepts. Automaton has 6717 states and 23595 transitions. Word has length 27 [2022-01-28 15:40:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:28,177 INFO L470 AbstractCegarLoop]: Abstraction has 6717 states and 23595 transitions. [2022-01-28 15:40:28,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-01-28 15:40:28,177 INFO L276 IsEmpty]: Start isEmpty. Operand 6717 states and 23595 transitions. [2022-01-28 15:40:28,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:28,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:28,185 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:28,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-28 15:40:28,386 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,SelfDestructingSolverStorable66 [2022-01-28 15:40:28,386 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:28,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:28,386 INFO L85 PathProgramCache]: Analyzing trace with hash -2088141458, now seen corresponding path program 19 times [2022-01-28 15:40:28,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:28,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801348620] [2022-01-28 15:40:28,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:28,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:28,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:28,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801348620] [2022-01-28 15:40:28,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801348620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:28,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097286646] [2022-01-28 15:40:28,428 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:28,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:28,431 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) [2022-01-28 15:40:28,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 15:40:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:28,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:28,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097286646] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:28,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:28,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-28 15:40:28,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954864784] [2022-01-28 15:40:28,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:28,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-28 15:40:28,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:28,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-28 15:40:28,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-28 15:40:28,589 INFO L87 Difference]: Start difference. First operand 6717 states and 23595 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:28,874 INFO L93 Difference]: Finished difference Result 9155 states and 31004 transitions. [2022-01-28 15:40:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:40:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-01-28 15:40:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:28,892 INFO L225 Difference]: With dead ends: 9155 [2022-01-28 15:40:28,892 INFO L226 Difference]: Without dead ends: 9145 [2022-01-28 15:40:28,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:40:28,893 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:28,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 254 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:28,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9145 states. [2022-01-28 15:40:29,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9145 to 6962. [2022-01-28 15:40:29,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6962 states, 6961 states have (on average 3.5207585117080877) internal successors, (24508), 6961 states have internal predecessors, (24508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6962 states to 6962 states and 24508 transitions. [2022-01-28 15:40:29,035 INFO L78 Accepts]: Start accepts. Automaton has 6962 states and 24508 transitions. Word has length 27 [2022-01-28 15:40:29,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:29,035 INFO L470 AbstractCegarLoop]: Abstraction has 6962 states and 24508 transitions. [2022-01-28 15:40:29,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:29,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6962 states and 24508 transitions. [2022-01-28 15:40:29,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:29,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:29,046 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:29,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-28 15:40:29,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:29,246 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1818737390, now seen corresponding path program 20 times [2022-01-28 15:40:29,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:29,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651490718] [2022-01-28 15:40:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:29,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:29,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:29,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651490718] [2022-01-28 15:40:29,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651490718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:29,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729038918] [2022-01-28 15:40:29,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:29,276 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:29,277 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) [2022-01-28 15:40:29,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 15:40:29,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:29,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:29,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-28 15:40:29,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:29,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:29,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729038918] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:29,398 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:29,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-28 15:40:29,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074478484] [2022-01-28 15:40:29,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:29,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-28 15:40:29,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-28 15:40:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-28 15:40:29,398 INFO L87 Difference]: Start difference. First operand 6962 states and 24508 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-01-28 15:40:29,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:29,769 INFO L93 Difference]: Finished difference Result 11751 states and 39739 transitions. [2022-01-28 15:40:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-28 15:40:29,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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 27 [2022-01-28 15:40:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:29,796 INFO L225 Difference]: With dead ends: 11751 [2022-01-28 15:40:29,796 INFO L226 Difference]: Without dead ends: 11735 [2022-01-28 15:40:29,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:40:29,797 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 289 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:29,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 137 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:29,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11735 states. [2022-01-28 15:40:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11735 to 7106. [2022-01-28 15:40:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7106 states, 7105 states have (on average 3.5073891625615765) internal successors, (24920), 7105 states have internal predecessors, (24920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:29,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7106 states to 7106 states and 24920 transitions. [2022-01-28 15:40:29,961 INFO L78 Accepts]: Start accepts. Automaton has 7106 states and 24920 transitions. Word has length 27 [2022-01-28 15:40:29,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:29,961 INFO L470 AbstractCegarLoop]: Abstraction has 7106 states and 24920 transitions. [2022-01-28 15:40:29,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 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) [2022-01-28 15:40:29,961 INFO L276 IsEmpty]: Start isEmpty. Operand 7106 states and 24920 transitions. [2022-01-28 15:40:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:29,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:29,971 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:29,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-28 15:40:30,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:30,172 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:30,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:30,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1104222989, now seen corresponding path program 10 times [2022-01-28 15:40:30,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:30,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088780825] [2022-01-28 15:40:30,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:30,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:30,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088780825] [2022-01-28 15:40:30,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088780825] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:30,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934056204] [2022-01-28 15:40:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:30,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:30,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:30,202 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) [2022-01-28 15:40:30,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 15:40:30,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:30,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:30,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:30,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934056204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:30,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:30,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-01-28 15:40:30,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100171840] [2022-01-28 15:40:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:30,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-28 15:40:30,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-28 15:40:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-28 15:40:30,349 INFO L87 Difference]: Start difference. First operand 7106 states and 24920 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2022-01-28 15:40:30,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:30,658 INFO L93 Difference]: Finished difference Result 8555 states and 28945 transitions. [2022-01-28 15:40:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:40:30,659 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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 27 [2022-01-28 15:40:30,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:30,677 INFO L225 Difference]: With dead ends: 8555 [2022-01-28 15:40:30,677 INFO L226 Difference]: Without dead ends: 8555 [2022-01-28 15:40:30,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=530, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:40:30,677 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 171 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:30,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 111 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:30,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8555 states. [2022-01-28 15:40:30,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8555 to 7022. [2022-01-28 15:40:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7022 states, 7021 states have (on average 3.5060532687651333) internal successors, (24616), 7021 states have internal predecessors, (24616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7022 states to 7022 states and 24616 transitions. [2022-01-28 15:40:30,810 INFO L78 Accepts]: Start accepts. Automaton has 7022 states and 24616 transitions. Word has length 27 [2022-01-28 15:40:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:30,810 INFO L470 AbstractCegarLoop]: Abstraction has 7022 states and 24616 transitions. [2022-01-28 15:40:30,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 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) [2022-01-28 15:40:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 7022 states and 24616 transitions. [2022-01-28 15:40:30,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:40:30,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:30,821 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:30,837 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-28 15:40:31,022 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,SelfDestructingSolverStorable69 [2022-01-28 15:40:31,022 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1885222371, now seen corresponding path program 29 times [2022-01-28 15:40:31,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:31,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311480302] [2022-01-28 15:40:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:31,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:31,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:31,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311480302] [2022-01-28 15:40:31,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311480302] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:31,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679760054] [2022-01-28 15:40:31,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:31,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:31,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:31,189 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) [2022-01-28 15:40:31,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 15:40:31,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:40:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:40:31,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:31,391 INFO L388 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 28 treesize of output 16 [2022-01-28 15:40:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:31,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:31,585 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:31,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:40:31,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:31,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:31,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:31,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-01-28 15:40:31,693 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:31,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679760054] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:31,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:31,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-01-28 15:40:31,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402388407] [2022-01-28 15:40:31,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:31,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-28 15:40:31,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:31,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-28 15:40:31,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:31,695 INFO L87 Difference]: Start difference. First operand 7022 states and 24616 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:31,935 INFO L93 Difference]: Finished difference Result 7838 states and 27083 transitions. [2022-01-28 15:40:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:40:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:40:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:31,950 INFO L225 Difference]: With dead ends: 7838 [2022-01-28 15:40:31,950 INFO L226 Difference]: Without dead ends: 7769 [2022-01-28 15:40:31,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:31,951 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 121 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:31,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 371 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:31,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7769 states. [2022-01-28 15:40:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7769 to 7214. [2022-01-28 15:40:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7214 states, 7213 states have (on average 3.501178427838625) internal successors, (25254), 7213 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7214 states to 7214 states and 25254 transitions. [2022-01-28 15:40:32,068 INFO L78 Accepts]: Start accepts. Automaton has 7214 states and 25254 transitions. Word has length 30 [2022-01-28 15:40:32,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:32,069 INFO L470 AbstractCegarLoop]: Abstraction has 7214 states and 25254 transitions. [2022-01-28 15:40:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 7214 states and 25254 transitions. [2022-01-28 15:40:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:40:32,080 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:32,080 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:32,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:32,281 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:32,281 INFO L85 PathProgramCache]: Analyzing trace with hash -428025768, now seen corresponding path program 11 times [2022-01-28 15:40:32,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:32,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538841928] [2022-01-28 15:40:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:32,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:32,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:32,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538841928] [2022-01-28 15:40:32,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538841928] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:32,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396248624] [2022-01-28 15:40:32,576 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:32,576 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:32,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:32,577 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) [2022-01-28 15:40:32,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 15:40:32,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:40:32,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:32,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:40:32,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:32,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:32,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:40:32,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:32,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:33,248 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:40:33,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:40:33,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:33,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:33,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:33,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:40:33,574 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:33,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396248624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:33,574 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:33,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 15:40:33,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789737424] [2022-01-28 15:40:33,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:33,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:40:33,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:33,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:40:33,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:40:33,575 INFO L87 Difference]: Start difference. First operand 7214 states and 25254 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:40,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:40,350 INFO L93 Difference]: Finished difference Result 12499 states and 40331 transitions. [2022-01-28 15:40:40,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-28 15:40:40,350 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:40:40,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:40,379 INFO L225 Difference]: With dead ends: 12499 [2022-01-28 15:40:40,379 INFO L226 Difference]: Without dead ends: 12450 [2022-01-28 15:40:40,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4969 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1438, Invalid=13082, Unknown=0, NotChecked=0, Total=14520 [2022-01-28 15:40:40,380 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 738 mSDsluCounter, 1294 mSDsCounter, 0 mSdLazyCounter, 3474 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 3667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 3474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:40,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [738 Valid, 703 Invalid, 3667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 3474 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:40:40,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12450 states. [2022-01-28 15:40:40,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12450 to 7310. [2022-01-28 15:40:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7310 states, 7309 states have (on average 3.500615679299494) internal successors, (25586), 7309 states have internal predecessors, (25586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:40,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7310 states to 7310 states and 25586 transitions. [2022-01-28 15:40:40,559 INFO L78 Accepts]: Start accepts. Automaton has 7310 states and 25586 transitions. Word has length 30 [2022-01-28 15:40:40,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:40,559 INFO L470 AbstractCegarLoop]: Abstraction has 7310 states and 25586 transitions. [2022-01-28 15:40:40,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:40,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7310 states and 25586 transitions. [2022-01-28 15:40:40,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:40:40,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:40,570 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:40,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-28 15:40:40,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:40,770 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:40:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:40,771 INFO L85 PathProgramCache]: Analyzing trace with hash 719071820, now seen corresponding path program 12 times [2022-01-28 15:40:40,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:40,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259604725] [2022-01-28 15:40:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:40,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:41,048 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259604725] [2022-01-28 15:40:41,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259604725] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:41,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707783964] [2022-01-28 15:40:41,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:41,048 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:41,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:41,052 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) [2022-01-28 15:40:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 15:40:41,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:40:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:41,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:40:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:41,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:41,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:40:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:41,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:42,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:42,256 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:42,267 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:42,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:40:42,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:42,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-28 15:40:42,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:42,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707783964] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:42,409 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:42,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 39 [2022-01-28 15:40:42,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094613429] [2022-01-28 15:40:42,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:42,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-28 15:40:42,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:42,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-28 15:40:42,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:40:42,410 INFO L87 Difference]: Start difference. First operand 7310 states and 25586 transitions. Second operand has 39 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) [2022-01-28 15:41:14,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:14,818 INFO L93 Difference]: Finished difference Result 17558 states and 56876 transitions. [2022-01-28 15:41:14,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 335 states. [2022-01-28 15:41:14,818 INFO L78 Accepts]: Start accepts. Automaton has has 39 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) Word has length 30 [2022-01-28 15:41:14,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:14,857 INFO L225 Difference]: With dead ends: 17558 [2022-01-28 15:41:14,858 INFO L226 Difference]: Without dead ends: 17488 [2022-01-28 15:41:14,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54673 ImplicationChecksByTransitivity, 29.0s TimeCoverageRelationStatistics Valid=11764, Invalid=116041, Unknown=1, NotChecked=0, Total=127806 [2022-01-28 15:41:14,867 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 1475 mSDsluCounter, 2898 mSDsCounter, 0 mSdLazyCounter, 7075 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1475 SdHoareTripleChecker+Valid, 1552 SdHoareTripleChecker+Invalid, 8448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 7075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 790 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:14,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1475 Valid, 1552 Invalid, 8448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 7075 Invalid, 0 Unknown, 790 Unchecked, 3.8s Time] [2022-01-28 15:41:14,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17488 states. [2022-01-28 15:41:15,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17488 to 7423. [2022-01-28 15:41:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7423 states, 7422 states have (on average 3.5043115063325248) internal successors, (26009), 7422 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 26009 transitions. [2022-01-28 15:41:15,109 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 26009 transitions. Word has length 30 [2022-01-28 15:41:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:15,109 INFO L470 AbstractCegarLoop]: Abstraction has 7423 states and 26009 transitions. [2022-01-28 15:41:15,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 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) [2022-01-28 15:41:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 26009 transitions. [2022-01-28 15:41:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:15,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:15,122 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:15,337 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,SelfDestructingSolverStorable72 [2022-01-28 15:41:15,337 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:15,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1895398836, now seen corresponding path program 13 times [2022-01-28 15:41:15,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:15,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472144099] [2022-01-28 15:41:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:15,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:15,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:15,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472144099] [2022-01-28 15:41:15,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472144099] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:15,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365935943] [2022-01-28 15:41:15,607 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:41:15,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:15,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:15,608 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) [2022-01-28 15:41:15,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 15:41:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:15,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:41:15,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:15,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:15,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:41:15,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:15,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:16,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:16,247 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:16,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:41:16,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:16,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:16,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:41:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:16,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365935943] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:16,545 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:16,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:41:16,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474205314] [2022-01-28 15:41:16,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:16,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:41:16,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:16,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:41:16,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:41:16,546 INFO L87 Difference]: Start difference. First operand 7423 states and 26009 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:21,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:21,898 INFO L93 Difference]: Finished difference Result 12064 states and 38485 transitions. [2022-01-28 15:41:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-28 15:41:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:41:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:21,921 INFO L225 Difference]: With dead ends: 12064 [2022-01-28 15:41:21,921 INFO L226 Difference]: Without dead ends: 12019 [2022-01-28 15:41:21,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4604 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1880, Invalid=11002, Unknown=0, NotChecked=0, Total=12882 [2022-01-28 15:41:21,922 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 723 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 3166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:21,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 696 Invalid, 3166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 2839 Invalid, 0 Unknown, 170 Unchecked, 1.3s Time] [2022-01-28 15:41:21,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12019 states. [2022-01-28 15:41:22,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12019 to 7432. [2022-01-28 15:41:22,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 7431 states have (on average 3.5035661418382453) internal successors, (26035), 7431 states have internal predecessors, (26035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:22,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 26035 transitions. [2022-01-28 15:41:22,088 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 26035 transitions. Word has length 30 [2022-01-28 15:41:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 7432 states and 26035 transitions. [2022-01-28 15:41:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 26035 transitions. [2022-01-28 15:41:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:22,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:22,101 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:22,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-01-28 15:41:22,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:22,302 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:22,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash -651619458, now seen corresponding path program 14 times [2022-01-28 15:41:22,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:22,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443534382] [2022-01-28 15:41:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:22,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:22,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:22,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443534382] [2022-01-28 15:41:22,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443534382] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:22,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946320913] [2022-01-28 15:41:22,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:41:22,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:22,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:22,570 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) [2022-01-28 15:41:22,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 15:41:22,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:41:22,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:22,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:41:22,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:22,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:22,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:41:22,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:22,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:23,200 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:41:23,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:41:23,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:23,358 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:23,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:41:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:23,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946320913] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:23,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:23,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-28 15:41:23,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93708767] [2022-01-28 15:41:23,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:23,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:41:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:41:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:41:23,520 INFO L87 Difference]: Start difference. First operand 7432 states and 26035 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:41:29,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:29,342 INFO L93 Difference]: Finished difference Result 12701 states and 41240 transitions. [2022-01-28 15:41:29,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-28 15:41:29,342 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) Word has length 30 [2022-01-28 15:41:29,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:29,368 INFO L225 Difference]: With dead ends: 12701 [2022-01-28 15:41:29,368 INFO L226 Difference]: Without dead ends: 12606 [2022-01-28 15:41:29,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4204 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1355, Invalid=11527, Unknown=0, NotChecked=0, Total=12882 [2022-01-28 15:41:29,369 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 636 mSDsluCounter, 1260 mSDsCounter, 0 mSdLazyCounter, 3506 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 3650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:29,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 812 Invalid, 3650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3506 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:41:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12606 states. [2022-01-28 15:41:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12606 to 7477. [2022-01-28 15:41:29,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7477 states, 7476 states have (on average 3.505751738897806) internal successors, (26209), 7476 states have internal predecessors, (26209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7477 states to 7477 states and 26209 transitions. [2022-01-28 15:41:29,538 INFO L78 Accepts]: Start accepts. Automaton has 7477 states and 26209 transitions. Word has length 30 [2022-01-28 15:41:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:29,538 INFO L470 AbstractCegarLoop]: Abstraction has 7477 states and 26209 transitions. [2022-01-28 15:41:29,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:41:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7477 states and 26209 transitions. [2022-01-28 15:41:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:29,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:29,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:29,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-28 15:41:29,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-01-28 15:41:29,750 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:29,751 INFO L85 PathProgramCache]: Analyzing trace with hash 491925475, now seen corresponding path program 21 times [2022-01-28 15:41:29,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:29,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237820418] [2022-01-28 15:41:29,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:29,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:30,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:30,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237820418] [2022-01-28 15:41:30,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237820418] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:30,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272307961] [2022-01-28 15:41:30,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:41:30,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:30,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:30,121 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) [2022-01-28 15:41:30,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 15:41:30,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:41:30,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:30,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:41:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:30,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:41:30,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:30,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:30,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:30,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-01-28 15:41:30,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:30,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:30,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:41:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:30,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272307961] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:30,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:30,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 35 [2022-01-28 15:41:30,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183541803] [2022-01-28 15:41:30,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:30,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-28 15:41:30,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:30,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-28 15:41:30,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:41:30,885 INFO L87 Difference]: Start difference. First operand 7477 states and 26209 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:39,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:39,979 INFO L93 Difference]: Finished difference Result 12718 states and 41475 transitions. [2022-01-28 15:41:39,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-28 15:41:39,979 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:41:39,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:40,004 INFO L225 Difference]: With dead ends: 12718 [2022-01-28 15:41:40,004 INFO L226 Difference]: Without dead ends: 12671 [2022-01-28 15:41:40,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9434 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=2795, Invalid=23611, Unknown=0, NotChecked=0, Total=26406 [2022-01-28 15:41:40,006 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 923 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 4728 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1202 SdHoareTripleChecker+Invalid, 4987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 4728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:40,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [923 Valid, 1202 Invalid, 4987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 4728 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-28 15:41:40,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12671 states. [2022-01-28 15:41:40,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12671 to 7785. [2022-01-28 15:41:40,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7785 states, 7784 states have (on average 3.4863823227132578) internal successors, (27138), 7784 states have internal predecessors, (27138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:40,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7785 states to 7785 states and 27138 transitions. [2022-01-28 15:41:40,188 INFO L78 Accepts]: Start accepts. Automaton has 7785 states and 27138 transitions. Word has length 30 [2022-01-28 15:41:40,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:40,188 INFO L470 AbstractCegarLoop]: Abstraction has 7785 states and 27138 transitions. [2022-01-28 15:41:40,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:40,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7785 states and 27138 transitions. [2022-01-28 15:41:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:40,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:40,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:40,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-01-28 15:41:40,400 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,SelfDestructingSolverStorable75 [2022-01-28 15:41:40,400 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:40,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1609388934, now seen corresponding path program 15 times [2022-01-28 15:41:40,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:40,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986804077] [2022-01-28 15:41:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:40,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:40,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:40,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986804077] [2022-01-28 15:41:40,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986804077] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:40,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145772021] [2022-01-28 15:41:40,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:41:40,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:40,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:40,676 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) [2022-01-28 15:41:40,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 15:41:40,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:41:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:40,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:41:40,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:41,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:41,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:41,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:41:41,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:41,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:41,463 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 68 [2022-01-28 15:41:41,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:41,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145772021] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:41,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:41,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-28 15:41:41,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318928970] [2022-01-28 15:41:41,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:41,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:41:41,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:41,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:41:41,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:41:41,959 INFO L87 Difference]: Start difference. First operand 7785 states and 27138 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:45,926 INFO L93 Difference]: Finished difference Result 12469 states and 39853 transitions. [2022-01-28 15:41:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-28 15:41:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:41:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:45,951 INFO L225 Difference]: With dead ends: 12469 [2022-01-28 15:41:45,951 INFO L226 Difference]: Without dead ends: 12448 [2022-01-28 15:41:45,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 4023 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1527, Invalid=9185, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:41:45,952 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 586 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 898 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:45,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 550 Invalid, 2470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1431 Invalid, 0 Unknown, 898 Unchecked, 0.7s Time] [2022-01-28 15:41:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12448 states. [2022-01-28 15:41:46,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12448 to 7792. [2022-01-28 15:41:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7792 states, 7791 states have (on average 3.4869721473495057) internal successors, (27167), 7791 states have internal predecessors, (27167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7792 states to 7792 states and 27167 transitions. [2022-01-28 15:41:46,115 INFO L78 Accepts]: Start accepts. Automaton has 7792 states and 27167 transitions. Word has length 30 [2022-01-28 15:41:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:46,115 INFO L470 AbstractCegarLoop]: Abstraction has 7792 states and 27167 transitions. [2022-01-28 15:41:46,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 7792 states and 27167 transitions. [2022-01-28 15:41:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:46,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:46,126 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:46,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:46,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:46,326 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:46,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash 680823678, now seen corresponding path program 16 times [2022-01-28 15:41:46,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761570236] [2022-01-28 15:41:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:46,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:46,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:46,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761570236] [2022-01-28 15:41:46,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761570236] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:46,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231575084] [2022-01-28 15:41:46,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:41:46,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:46,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:46,566 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) [2022-01-28 15:41:46,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 15:41:46,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:41:46,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:41:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:46,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:46,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:46,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:41:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:46,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:47,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:47,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:47,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:41:47,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:47,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:47,369 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:47,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:41:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:47,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231575084] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:47,519 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:47,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:41:47,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642875003] [2022-01-28 15:41:47,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:47,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:41:47,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:47,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:41:47,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=839, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:41:47,520 INFO L87 Difference]: Start difference. First operand 7792 states and 27167 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:53,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:53,525 INFO L93 Difference]: Finished difference Result 13386 states and 42060 transitions. [2022-01-28 15:41:53,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-28 15:41:53,526 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:41:53,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:53,554 INFO L225 Difference]: With dead ends: 13386 [2022-01-28 15:41:53,554 INFO L226 Difference]: Without dead ends: 13341 [2022-01-28 15:41:53,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6286 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2569, Invalid=13943, Unknown=0, NotChecked=0, Total=16512 [2022-01-28 15:41:53,556 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 1233 mSDsluCounter, 984 mSDsCounter, 0 mSdLazyCounter, 2454 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1233 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 2454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:53,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1233 Valid, 563 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 2454 Invalid, 0 Unknown, 61 Unchecked, 1.2s Time] [2022-01-28 15:41:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13341 states. [2022-01-28 15:41:53,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13341 to 7805. [2022-01-28 15:41:53,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7805 states, 7804 states have (on average 3.487570476678626) internal successors, (27217), 7804 states have internal predecessors, (27217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7805 states to 7805 states and 27217 transitions. [2022-01-28 15:41:53,746 INFO L78 Accepts]: Start accepts. Automaton has 7805 states and 27217 transitions. Word has length 30 [2022-01-28 15:41:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:53,746 INFO L470 AbstractCegarLoop]: Abstraction has 7805 states and 27217 transitions. [2022-01-28 15:41:53,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 7805 states and 27217 transitions. [2022-01-28 15:41:53,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:41:53,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:53,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:53,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:53,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:53,961 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:41:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:53,961 INFO L85 PathProgramCache]: Analyzing trace with hash 39533232, now seen corresponding path program 17 times [2022-01-28 15:41:53,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:53,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060801170] [2022-01-28 15:41:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:53,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:54,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:54,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:54,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060801170] [2022-01-28 15:41:54,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060801170] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:54,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279478379] [2022-01-28 15:41:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:41:54,269 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:54,270 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) [2022-01-28 15:41:54,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 15:41:54,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:41:54,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:54,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:41:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:54,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:54,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:54,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:41:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:54,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:54,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:54,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:54,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:41:55,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:55,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:55,053 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:41:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:55,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279478379] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:55,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:55,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-28 15:41:55,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485517327] [2022-01-28 15:41:55,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:55,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:41:55,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:55,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:41:55,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:41:55,211 INFO L87 Difference]: Start difference. First operand 7805 states and 27217 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) [2022-01-28 15:42:00,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:00,739 INFO L93 Difference]: Finished difference Result 12854 states and 40648 transitions. [2022-01-28 15:42:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-28 15:42:00,740 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) Word has length 30 [2022-01-28 15:42:00,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:00,763 INFO L225 Difference]: With dead ends: 12854 [2022-01-28 15:42:00,763 INFO L226 Difference]: Without dead ends: 12809 [2022-01-28 15:42:00,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4772 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2022, Invalid=11088, Unknown=0, NotChecked=0, Total=13110 [2022-01-28 15:42:00,765 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 819 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 2885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:00,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [819 Valid, 637 Invalid, 2885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:42:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12809 states. [2022-01-28 15:42:00,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12809 to 7798. [2022-01-28 15:42:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7798 states, 7797 states have (on average 3.486982172630499) internal successors, (27188), 7797 states have internal predecessors, (27188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:00,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7798 states to 7798 states and 27188 transitions. [2022-01-28 15:42:00,983 INFO L78 Accepts]: Start accepts. Automaton has 7798 states and 27188 transitions. Word has length 30 [2022-01-28 15:42:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:00,983 INFO L470 AbstractCegarLoop]: Abstraction has 7798 states and 27188 transitions. [2022-01-28 15:42:00,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) [2022-01-28 15:42:00,983 INFO L276 IsEmpty]: Start isEmpty. Operand 7798 states and 27188 transitions. [2022-01-28 15:42:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:00,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:00,995 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:01,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-28 15:42:01,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-28 15:42:01,195 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:01,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:01,196 INFO L85 PathProgramCache]: Analyzing trace with hash -168495444, now seen corresponding path program 18 times [2022-01-28 15:42:01,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:01,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490906281] [2022-01-28 15:42:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:01,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:01,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:01,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:01,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490906281] [2022-01-28 15:42:01,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490906281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:01,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528243593] [2022-01-28 15:42:01,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:42:01,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:01,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:01,453 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) [2022-01-28 15:42:01,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 15:42:01,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:42:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:01,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:42:01,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:01,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:01,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:01,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:42:01,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:01,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:02,045 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:42:02,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:42:02,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:02,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:02,185 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:02,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:42:02,334 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:02,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528243593] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:02,335 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:02,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-28 15:42:02,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015925018] [2022-01-28 15:42:02,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:02,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:42:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:02,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:42:02,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:42:02,335 INFO L87 Difference]: Start difference. First operand 7798 states and 27188 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:42:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:09,679 INFO L93 Difference]: Finished difference Result 14477 states and 46233 transitions. [2022-01-28 15:42:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-28 15:42:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) Word has length 30 [2022-01-28 15:42:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:09,708 INFO L225 Difference]: With dead ends: 14477 [2022-01-28 15:42:09,708 INFO L226 Difference]: Without dead ends: 14375 [2022-01-28 15:42:09,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6273 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1815, Invalid=16007, Unknown=0, NotChecked=0, Total=17822 [2022-01-28 15:42:09,709 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 795 mSDsluCounter, 1690 mSDsCounter, 0 mSdLazyCounter, 4312 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 4478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 4312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:09,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1129 Invalid, 4478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 4312 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-28 15:42:09,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14375 states. [2022-01-28 15:42:09,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14375 to 7824. [2022-01-28 15:42:09,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.4877924070049855) internal successors, (27285), 7823 states have internal predecessors, (27285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 27285 transitions. [2022-01-28 15:42:09,893 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 27285 transitions. Word has length 30 [2022-01-28 15:42:09,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:09,893 INFO L470 AbstractCegarLoop]: Abstraction has 7824 states and 27285 transitions. [2022-01-28 15:42:09,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:42:09,893 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 27285 transitions. [2022-01-28 15:42:09,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:09,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:09,904 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:09,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:10,104 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,SelfDestructingSolverStorable79 [2022-01-28 15:42:10,105 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:10,105 INFO L85 PathProgramCache]: Analyzing trace with hash -350592620, now seen corresponding path program 19 times [2022-01-28 15:42:10,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:10,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146375402] [2022-01-28 15:42:10,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:10,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:10,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:10,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146375402] [2022-01-28 15:42:10,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146375402] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345509449] [2022-01-28 15:42:10,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:42:10,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:10,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:10,356 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) [2022-01-28 15:42:10,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 15:42:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:10,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:42:10,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:10,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:10,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:10,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:42:10,694 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:10,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:10,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:10,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:10,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:42:11,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:11,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:11,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:11,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:42:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:11,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345509449] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:11,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:11,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-28 15:42:11,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651029972] [2022-01-28 15:42:11,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:11,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:42:11,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:42:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=847, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:42:11,322 INFO L87 Difference]: Start difference. First operand 7824 states and 27285 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:15,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:15,850 INFO L93 Difference]: Finished difference Result 11912 states and 38223 transitions. [2022-01-28 15:42:15,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-28 15:42:15,851 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:42:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:15,873 INFO L225 Difference]: With dead ends: 11912 [2022-01-28 15:42:15,873 INFO L226 Difference]: Without dead ends: 11867 [2022-01-28 15:42:15,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1407, Invalid=9723, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 15:42:15,874 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 743 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 2687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:15,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 507 Invalid, 2687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:42:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11867 states. [2022-01-28 15:42:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11867 to 7819. [2022-01-28 15:42:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7819 states, 7818 states have (on average 3.4879764645689435) internal successors, (27269), 7818 states have internal predecessors, (27269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:16,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7819 states to 7819 states and 27269 transitions. [2022-01-28 15:42:16,037 INFO L78 Accepts]: Start accepts. Automaton has 7819 states and 27269 transitions. Word has length 30 [2022-01-28 15:42:16,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:16,037 INFO L470 AbstractCegarLoop]: Abstraction has 7819 states and 27269 transitions. [2022-01-28 15:42:16,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:16,037 INFO L276 IsEmpty]: Start isEmpty. Operand 7819 states and 27269 transitions. [2022-01-28 15:42:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:16,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:16,048 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:16,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-01-28 15:42:16,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:16,248 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2095065048, now seen corresponding path program 20 times [2022-01-28 15:42:16,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:16,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78269552] [2022-01-28 15:42:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:16,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:16,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:16,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:16,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78269552] [2022-01-28 15:42:16,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78269552] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941477786] [2022-01-28 15:42:16,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:42:16,513 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:16,514 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) [2022-01-28 15:42:16,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 15:42:16,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:42:16,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:16,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:42:16,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:16,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:16,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:42:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:16,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:17,354 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:42:17,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:42:17,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:17,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:17,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:17,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:42:17,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:17,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941477786] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:17,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:17,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 37 [2022-01-28 15:42:17,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219193572] [2022-01-28 15:42:17,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:17,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-28 15:42:17,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:17,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-28 15:42:17,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:42:17,635 INFO L87 Difference]: Start difference. First operand 7819 states and 27269 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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) [2022-01-28 15:42:36,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:36,021 INFO L93 Difference]: Finished difference Result 17396 states and 55603 transitions. [2022-01-28 15:42:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2022-01-28 15:42:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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) Word has length 30 [2022-01-28 15:42:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:36,062 INFO L225 Difference]: With dead ends: 17396 [2022-01-28 15:42:36,062 INFO L226 Difference]: Without dead ends: 17292 [2022-01-28 15:42:36,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31857 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=6845, Invalid=70717, Unknown=0, NotChecked=0, Total=77562 [2022-01-28 15:42:36,066 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 1361 mSDsluCounter, 3036 mSDsCounter, 0 mSdLazyCounter, 8469 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1361 SdHoareTripleChecker+Valid, 1656 SdHoareTripleChecker+Invalid, 8976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 8469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:36,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1361 Valid, 1656 Invalid, 8976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 8469 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-28 15:42:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17292 states. [2022-01-28 15:42:36,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17292 to 7861. [2022-01-28 15:42:36,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7861 states, 7860 states have (on average 3.4900763358778626) internal successors, (27432), 7860 states have internal predecessors, (27432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:36,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7861 states to 7861 states and 27432 transitions. [2022-01-28 15:42:36,310 INFO L78 Accepts]: Start accepts. Automaton has 7861 states and 27432 transitions. Word has length 30 [2022-01-28 15:42:36,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:36,310 INFO L470 AbstractCegarLoop]: Abstraction has 7861 states and 27432 transitions. [2022-01-28 15:42:36,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 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) [2022-01-28 15:42:36,310 INFO L276 IsEmpty]: Start isEmpty. Operand 7861 states and 27432 transitions. [2022-01-28 15:42:36,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:36,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:36,322 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:36,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-01-28 15:42:36,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:36,535 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:36,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:36,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1211295284, now seen corresponding path program 21 times [2022-01-28 15:42:36,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:36,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733630450] [2022-01-28 15:42:36,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:36,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:36,775 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:36,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733630450] [2022-01-28 15:42:36,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733630450] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:36,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232823494] [2022-01-28 15:42:36,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:42:36,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:36,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:36,777 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) [2022-01-28 15:42:36,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-01-28 15:42:36,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:42:36,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:36,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:42:36,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:37,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:37,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:42:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:37,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:37,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:37,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:42:37,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:37,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:37,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:37,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:42:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:37,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232823494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:37,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:37,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:42:37,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130045372] [2022-01-28 15:42:37,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:42:37,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:37,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:42:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:42:37,698 INFO L87 Difference]: Start difference. First operand 7861 states and 27432 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:45,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:45,464 INFO L93 Difference]: Finished difference Result 13838 states and 45113 transitions. [2022-01-28 15:42:45,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-28 15:42:45,464 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:42:45,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:45,492 INFO L225 Difference]: With dead ends: 13838 [2022-01-28 15:42:45,492 INFO L226 Difference]: Without dead ends: 13808 [2022-01-28 15:42:45,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7314 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2214, Invalid=18092, Unknown=0, NotChecked=0, Total=20306 [2022-01-28 15:42:45,493 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 661 mSDsluCounter, 1731 mSDsCounter, 0 mSdLazyCounter, 4622 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 4845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 4622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:45,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 950 Invalid, 4845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 4622 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-28 15:42:45,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13808 states. [2022-01-28 15:42:45,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13808 to 7863. [2022-01-28 15:42:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7863 states, 7862 states have (on average 3.490206054439074) internal successors, (27440), 7862 states have internal predecessors, (27440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:45,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 27440 transitions. [2022-01-28 15:42:45,674 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 27440 transitions. Word has length 30 [2022-01-28 15:42:45,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:45,674 INFO L470 AbstractCegarLoop]: Abstraction has 7863 states and 27440 transitions. [2022-01-28 15:42:45,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:45,674 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 27440 transitions. [2022-01-28 15:42:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:45,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:45,685 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:45,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:45,887 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,SelfDestructingSolverStorable82 [2022-01-28 15:42:45,887 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:45,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:45,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2079527216, now seen corresponding path program 22 times [2022-01-28 15:42:45,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:45,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682815241] [2022-01-28 15:42:45,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:45,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:45,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:46,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682815241] [2022-01-28 15:42:46,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682815241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738409257] [2022-01-28 15:42:46,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:42:46,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:46,159 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) [2022-01-28 15:42:46,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-01-28 15:42:46,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:42:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:46,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:42:46,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:46,412 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:46,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:42:46,482 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:46,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:46,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:46,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:46,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:42:46,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:46,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:46,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:46,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:42:47,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:47,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738409257] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:47,039 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:47,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-28 15:42:47,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663818625] [2022-01-28 15:42:47,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:47,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:42:47,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:47,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:42:47,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:42:47,040 INFO L87 Difference]: Start difference. First operand 7863 states and 27440 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:59,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:59,197 INFO L93 Difference]: Finished difference Result 14810 states and 47940 transitions. [2022-01-28 15:42:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-01-28 15:42:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:42:59,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:59,225 INFO L225 Difference]: With dead ends: 14810 [2022-01-28 15:42:59,225 INFO L226 Difference]: Without dead ends: 14765 [2022-01-28 15:42:59,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13427 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3670, Invalid=31112, Unknown=0, NotChecked=0, Total=34782 [2022-01-28 15:42:59,228 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 783 mSDsluCounter, 2577 mSDsCounter, 0 mSdLazyCounter, 6876 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 1576 SdHoareTripleChecker+Invalid, 7142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 6876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:59,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 1576 Invalid, 7142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 6876 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-28 15:42:59,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14765 states. [2022-01-28 15:42:59,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14765 to 7863. [2022-01-28 15:42:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7863 states, 7862 states have (on average 3.490206054439074) internal successors, (27440), 7862 states have internal predecessors, (27440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:59,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7863 states to 7863 states and 27440 transitions. [2022-01-28 15:42:59,411 INFO L78 Accepts]: Start accepts. Automaton has 7863 states and 27440 transitions. Word has length 30 [2022-01-28 15:42:59,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:59,411 INFO L470 AbstractCegarLoop]: Abstraction has 7863 states and 27440 transitions. [2022-01-28 15:42:59,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7863 states and 27440 transitions. [2022-01-28 15:42:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:42:59,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:59,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:59,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-01-28 15:42:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:59,622 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:42:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1359410238, now seen corresponding path program 23 times [2022-01-28 15:42:59,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777859464] [2022-01-28 15:42:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:59,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:59,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:59,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777859464] [2022-01-28 15:42:59,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777859464] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:59,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298802907] [2022-01-28 15:42:59,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:42:59,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:59,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:59,862 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) [2022-01-28 15:42:59,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-01-28 15:42:59,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:42:59,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:59,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:42:59,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:00,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:00,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:43:00,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:00,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:00,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:00,482 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:00,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:43:00,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:00,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:00,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:00,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:43:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:00,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298802907] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:00,816 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:00,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-28 15:43:00,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677137829] [2022-01-28 15:43:00,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:00,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:43:00,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:00,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:43:00,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:43:00,817 INFO L87 Difference]: Start difference. First operand 7863 states and 27440 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-01-28 15:43:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:05,893 INFO L93 Difference]: Finished difference Result 12868 states and 41882 transitions. [2022-01-28 15:43:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-28 15:43:05,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) Word has length 30 [2022-01-28 15:43:05,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:05,921 INFO L225 Difference]: With dead ends: 12868 [2022-01-28 15:43:05,922 INFO L226 Difference]: Without dead ends: 12838 [2022-01-28 15:43:05,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3773 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1478, Invalid=9864, Unknown=0, NotChecked=0, Total=11342 [2022-01-28 15:43:05,922 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 624 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:05,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [624 Valid, 598 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:43:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12838 states. [2022-01-28 15:43:06,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12838 to 7866. [2022-01-28 15:43:06,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7866 states, 7865 states have (on average 3.4902733630006355) internal successors, (27451), 7865 states have internal predecessors, (27451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7866 states to 7866 states and 27451 transitions. [2022-01-28 15:43:06,121 INFO L78 Accepts]: Start accepts. Automaton has 7866 states and 27451 transitions. Word has length 30 [2022-01-28 15:43:06,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:06,121 INFO L470 AbstractCegarLoop]: Abstraction has 7866 states and 27451 transitions. [2022-01-28 15:43:06,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-01-28 15:43:06,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7866 states and 27451 transitions. [2022-01-28 15:43:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:43:06,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:06,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:06,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-01-28 15:43:06,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:06,334 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:43:06,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:06,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1324381350, now seen corresponding path program 24 times [2022-01-28 15:43:06,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:06,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794896745] [2022-01-28 15:43:06,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:06,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:06,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:06,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794896745] [2022-01-28 15:43:06,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794896745] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:06,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469699708] [2022-01-28 15:43:06,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:43:06,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:06,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:06,565 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) [2022-01-28 15:43:06,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-01-28 15:43:06,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:43:06,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:06,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:43:06,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:06,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:06,810 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:06,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:43:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:06,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:07,212 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:43:07,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:43:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:07,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:07,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:07,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:43:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:07,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469699708] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:07,507 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:07,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-28 15:43:07,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402402951] [2022-01-28 15:43:07,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:07,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:43:07,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:43:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:43:07,508 INFO L87 Difference]: Start difference. First operand 7866 states and 27451 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:43:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:16,008 INFO L93 Difference]: Finished difference Result 14104 states and 46373 transitions. [2022-01-28 15:43:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-28 15:43:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) Word has length 30 [2022-01-28 15:43:16,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:16,037 INFO L225 Difference]: With dead ends: 14104 [2022-01-28 15:43:16,037 INFO L226 Difference]: Without dead ends: 14045 [2022-01-28 15:43:16,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6021 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1900, Invalid=15656, Unknown=0, NotChecked=0, Total=17556 [2022-01-28 15:43:16,038 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 765 mSDsluCounter, 1424 mSDsCounter, 0 mSdLazyCounter, 3753 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 3990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 3753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:16,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [765 Valid, 828 Invalid, 3990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 3753 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:43:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2022-01-28 15:43:16,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 7848. [2022-01-28 15:43:16,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7848 states, 7847 states have (on average 3.4902510513572067) internal successors, (27388), 7847 states have internal predecessors, (27388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:16,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7848 states to 7848 states and 27388 transitions. [2022-01-28 15:43:16,245 INFO L78 Accepts]: Start accepts. Automaton has 7848 states and 27388 transitions. Word has length 30 [2022-01-28 15:43:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 7848 states and 27388 transitions. [2022-01-28 15:43:16,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:43:16,246 INFO L276 IsEmpty]: Start isEmpty. Operand 7848 states and 27388 transitions. [2022-01-28 15:43:16,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:43:16,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:16,257 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:16,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:16,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:16,458 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:43:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:16,458 INFO L85 PathProgramCache]: Analyzing trace with hash -801041019, now seen corresponding path program 22 times [2022-01-28 15:43:16,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:16,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002957554] [2022-01-28 15:43:16,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:16,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:16,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002957554] [2022-01-28 15:43:16,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002957554] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:16,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652287011] [2022-01-28 15:43:16,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:43:16,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:16,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:16,855 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) [2022-01-28 15:43:16,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-01-28 15:43:16,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:43:16,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:43:16,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:17,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:17,198 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:17,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:43:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:17,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:17,466 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:17,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:43:17,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:17,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:17,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:17,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:43:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:17,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652287011] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:17,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:17,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-01-28 15:43:17,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442111064] [2022-01-28 15:43:17,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:17,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:43:17,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:17,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:43:17,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=872, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:43:17,596 INFO L87 Difference]: Start difference. First operand 7848 states and 27388 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:25,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:25,008 INFO L93 Difference]: Finished difference Result 16144 states and 53667 transitions. [2022-01-28 15:43:25,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-28 15:43:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:43:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:25,048 INFO L225 Difference]: With dead ends: 16144 [2022-01-28 15:43:25,048 INFO L226 Difference]: Without dead ends: 16097 [2022-01-28 15:43:25,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5985 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2594, Invalid=13918, Unknown=0, NotChecked=0, Total=16512 [2022-01-28 15:43:25,050 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 810 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 3972 mSolverCounterSat, 484 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 814 SdHoareTripleChecker+Invalid, 4456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 484 IncrementalHoareTripleChecker+Valid, 3972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:25,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 814 Invalid, 4456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [484 Valid, 3972 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-28 15:43:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16097 states. [2022-01-28 15:43:25,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16097 to 7867. [2022-01-28 15:43:25,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7867 states, 7866 states have (on average 3.4888126112382407) internal successors, (27443), 7866 states have internal predecessors, (27443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:25,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7867 states to 7867 states and 27443 transitions. [2022-01-28 15:43:25,270 INFO L78 Accepts]: Start accepts. Automaton has 7867 states and 27443 transitions. Word has length 30 [2022-01-28 15:43:25,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:25,270 INFO L470 AbstractCegarLoop]: Abstraction has 7867 states and 27443 transitions. [2022-01-28 15:43:25,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:25,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7867 states and 27443 transitions. [2022-01-28 15:43:25,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:43:25,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:25,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:25,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:25,482 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,SelfDestructingSolverStorable86 [2022-01-28 15:43:25,482 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:43:25,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash -312520331, now seen corresponding path program 23 times [2022-01-28 15:43:25,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:25,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377814962] [2022-01-28 15:43:25,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:25,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:25,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377814962] [2022-01-28 15:43:25,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377814962] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:25,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628317299] [2022-01-28 15:43:25,770 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:43:25,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:25,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:25,771 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) [2022-01-28 15:43:25,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-01-28 15:43:25,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:43:25,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:25,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:43:25,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:26,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:26,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:26,129 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:26,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2022-01-28 15:43:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:26,442 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:26,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:43:26,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:26,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:26,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:26,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:43:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:26,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628317299] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:26,569 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:26,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 11] total 32 [2022-01-28 15:43:26,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262607104] [2022-01-28 15:43:26,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:26,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:43:26,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:26,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:43:26,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=926, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:43:26,570 INFO L87 Difference]: Start difference. First operand 7867 states and 27443 transitions. Second operand has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-01-28 15:43:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:48,484 INFO L93 Difference]: Finished difference Result 20645 states and 67630 transitions. [2022-01-28 15:43:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 285 states. [2022-01-28 15:43:48,484 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) Word has length 30 [2022-01-28 15:43:48,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:48,530 INFO L225 Difference]: With dead ends: 20645 [2022-01-28 15:43:48,530 INFO L226 Difference]: Without dead ends: 20597 [2022-01-28 15:43:48,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41453 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=9257, Invalid=85915, Unknown=0, NotChecked=0, Total=95172 [2022-01-28 15:43:48,535 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 964 mSDsluCounter, 2734 mSDsCounter, 0 mSdLazyCounter, 7173 mSolverCounterSat, 492 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 964 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 7665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 492 IncrementalHoareTripleChecker+Valid, 7173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:48,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [964 Valid, 1509 Invalid, 7665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [492 Valid, 7173 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-28 15:43:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20597 states. [2022-01-28 15:43:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20597 to 7882. [2022-01-28 15:43:48,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7882 states, 7881 states have (on average 3.4896586727572645) internal successors, (27502), 7881 states have internal predecessors, (27502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:48,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7882 states to 7882 states and 27502 transitions. [2022-01-28 15:43:48,812 INFO L78 Accepts]: Start accepts. Automaton has 7882 states and 27502 transitions. Word has length 30 [2022-01-28 15:43:48,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:48,812 INFO L470 AbstractCegarLoop]: Abstraction has 7882 states and 27502 transitions. [2022-01-28 15:43:48,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 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) [2022-01-28 15:43:48,812 INFO L276 IsEmpty]: Start isEmpty. Operand 7882 states and 27502 transitions. [2022-01-28 15:43:48,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:43:48,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:48,823 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:48,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:49,024 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,SelfDestructingSolverStorable87 [2022-01-28 15:43:49,024 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:43:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:49,025 INFO L85 PathProgramCache]: Analyzing trace with hash -53764609, now seen corresponding path program 24 times [2022-01-28 15:43:49,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42861895] [2022-01-28 15:43:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:49,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:49,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:49,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:49,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:49,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42861895] [2022-01-28 15:43:49,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42861895] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:49,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003769677] [2022-01-28 15:43:49,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:43:49,421 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:49,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:49,422 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) [2022-01-28 15:43:49,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-01-28 15:43:49,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:43:49,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:49,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:43:49,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:49,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:49,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:49,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:43:49,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:49,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:50,183 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:50,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:43:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:50,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:50,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:43:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:50,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003769677] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:50,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:50,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 36 [2022-01-28 15:43:50,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355425420] [2022-01-28 15:43:50,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:50,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-28 15:43:50,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-28 15:43:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:43:50,321 INFO L87 Difference]: Start difference. First operand 7882 states and 27502 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-01-28 15:43:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:58,759 INFO L93 Difference]: Finished difference Result 16115 states and 53585 transitions. [2022-01-28 15:43:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-28 15:43:58,760 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) Word has length 30 [2022-01-28 15:43:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:58,791 INFO L225 Difference]: With dead ends: 16115 [2022-01-28 15:43:58,791 INFO L226 Difference]: Without dead ends: 16068 [2022-01-28 15:43:58,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9478 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3565, Invalid=20927, Unknown=0, NotChecked=0, Total=24492 [2022-01-28 15:43:58,793 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 995 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 4087 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 4657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 4087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:58,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [995 Valid, 806 Invalid, 4657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 4087 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-28 15:43:58,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16068 states. [2022-01-28 15:43:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16068 to 7891. [2022-01-28 15:43:58,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7891 states, 7890 states have (on average 3.491508238276299) internal successors, (27548), 7890 states have internal predecessors, (27548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:58,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7891 states to 7891 states and 27548 transitions. [2022-01-28 15:43:58,976 INFO L78 Accepts]: Start accepts. Automaton has 7891 states and 27548 transitions. Word has length 30 [2022-01-28 15:43:58,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:58,976 INFO L470 AbstractCegarLoop]: Abstraction has 7891 states and 27548 transitions. [2022-01-28 15:43:58,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 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) [2022-01-28 15:43:58,976 INFO L276 IsEmpty]: Start isEmpty. Operand 7891 states and 27548 transitions. [2022-01-28 15:43:58,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:43:58,990 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:58,990 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:59,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-01-28 15:43:59,190 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,SelfDestructingSolverStorable88 [2022-01-28 15:43:59,190 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:43:59,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:59,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1098597152, now seen corresponding path program 25 times [2022-01-28 15:43:59,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:59,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995962901] [2022-01-28 15:43:59,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:59,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:59,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:59,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:59,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995962901] [2022-01-28 15:43:59,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995962901] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:59,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129630778] [2022-01-28 15:43:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:43:59,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:59,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:59,446 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) [2022-01-28 15:43:59,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-01-28 15:43:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:59,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:43:59,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:59,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:59,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:59,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:43:59,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:59,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:00,086 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:44:00,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:00,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:00,228 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:00,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:44:00,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:00,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129630778] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:00,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:00,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 30 [2022-01-28 15:44:00,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698096123] [2022-01-28 15:44:00,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:00,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:44:00,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:00,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:44:00,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:44:00,430 INFO L87 Difference]: Start difference. First operand 7891 states and 27548 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:05,530 INFO L93 Difference]: Finished difference Result 12999 states and 42208 transitions. [2022-01-28 15:44:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-28 15:44:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:44:05,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:05,558 INFO L225 Difference]: With dead ends: 12999 [2022-01-28 15:44:05,558 INFO L226 Difference]: Without dead ends: 12950 [2022-01-28 15:44:05,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3472 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1105, Invalid=9607, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:44:05,559 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 524 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3449 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 3449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:05,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [524 Valid, 846 Invalid, 3616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 3449 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:44:05,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12950 states. [2022-01-28 15:44:05,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12950 to 7935. [2022-01-28 15:44:05,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7935 states, 7934 states have (on average 3.4921855306276783) internal successors, (27707), 7934 states have internal predecessors, (27707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7935 states to 7935 states and 27707 transitions. [2022-01-28 15:44:05,770 INFO L78 Accepts]: Start accepts. Automaton has 7935 states and 27707 transitions. Word has length 30 [2022-01-28 15:44:05,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:05,770 INFO L470 AbstractCegarLoop]: Abstraction has 7935 states and 27707 transitions. [2022-01-28 15:44:05,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:05,770 INFO L276 IsEmpty]: Start isEmpty. Operand 7935 states and 27707 transitions. [2022-01-28 15:44:05,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:05,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:05,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:05,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-01-28 15:44:05,981 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,SelfDestructingSolverStorable89 [2022-01-28 15:44:05,981 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:05,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 2051794072, now seen corresponding path program 26 times [2022-01-28 15:44:05,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:05,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852147918] [2022-01-28 15:44:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:05,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:05,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:06,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852147918] [2022-01-28 15:44:06,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852147918] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:06,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782154686] [2022-01-28 15:44:06,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:44:06,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:06,256 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) [2022-01-28 15:44:06,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-01-28 15:44:06,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:44:06,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:06,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:44:06,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:06,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:06,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:06,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:44:06,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:06,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:06,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:06,857 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:06,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:06,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:06,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:06,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:06,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:44:07,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:07,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782154686] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:07,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-28 15:44:07,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079956692] [2022-01-28 15:44:07,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:07,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:44:07,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:07,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:44:07,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:44:07,169 INFO L87 Difference]: Start difference. First operand 7935 states and 27707 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:10,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:10,250 INFO L93 Difference]: Finished difference Result 11233 states and 36576 transitions. [2022-01-28 15:44:10,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:44:10,251 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:44:10,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:10,275 INFO L225 Difference]: With dead ends: 11233 [2022-01-28 15:44:10,276 INFO L226 Difference]: Without dead ends: 11188 [2022-01-28 15:44:10,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=804, Invalid=6168, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:44:10,276 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 476 mSDsluCounter, 1012 mSDsCounter, 0 mSdLazyCounter, 2621 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 2760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:10,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 596 Invalid, 2760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2621 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:44:10,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11188 states. [2022-01-28 15:44:10,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11188 to 7938. [2022-01-28 15:44:10,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7938 states, 7937 states have (on average 3.4918735038427617) internal successors, (27715), 7937 states have internal predecessors, (27715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:10,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7938 states to 7938 states and 27715 transitions. [2022-01-28 15:44:10,453 INFO L78 Accepts]: Start accepts. Automaton has 7938 states and 27715 transitions. Word has length 30 [2022-01-28 15:44:10,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:10,453 INFO L470 AbstractCegarLoop]: Abstraction has 7938 states and 27715 transitions. [2022-01-28 15:44:10,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:10,453 INFO L276 IsEmpty]: Start isEmpty. Operand 7938 states and 27715 transitions. [2022-01-28 15:44:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:10,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:10,464 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:10,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-01-28 15:44:10,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:10,668 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:10,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:10,668 INFO L85 PathProgramCache]: Analyzing trace with hash -368775916, now seen corresponding path program 27 times [2022-01-28 15:44:10,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:10,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980000689] [2022-01-28 15:44:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:10,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:10,892 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:10,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:10,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980000689] [2022-01-28 15:44:10,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980000689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:10,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132380753] [2022-01-28 15:44:10,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:44:10,893 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:10,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:10,893 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) [2022-01-28 15:44:10,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-01-28 15:44:10,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:44:10,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:10,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:44:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:11,214 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:11,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:44:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:11,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:11,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:11,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:11,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 25 [2022-01-28 15:44:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:11,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132380753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:11,965 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:11,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 33 [2022-01-28 15:44:11,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576962166] [2022-01-28 15:44:11,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:11,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:44:11,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:44:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:44:11,966 INFO L87 Difference]: Start difference. First operand 7938 states and 27715 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-01-28 15:44:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:15,564 INFO L93 Difference]: Finished difference Result 11833 states and 39710 transitions. [2022-01-28 15:44:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-28 15:44:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) Word has length 30 [2022-01-28 15:44:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:15,589 INFO L225 Difference]: With dead ends: 11833 [2022-01-28 15:44:15,589 INFO L226 Difference]: Without dead ends: 11773 [2022-01-28 15:44:15,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2744 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=925, Invalid=8387, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 15:44:15,590 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 403 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 2584 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 3190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:15,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 560 Invalid, 3190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2584 Invalid, 0 Unknown, 525 Unchecked, 1.0s Time] [2022-01-28 15:44:15,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11773 states. [2022-01-28 15:44:15,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11773 to 7950. [2022-01-28 15:44:15,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7950 states, 7949 states have (on average 3.4910051578814945) internal successors, (27750), 7949 states have internal predecessors, (27750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:15,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7950 states to 7950 states and 27750 transitions. [2022-01-28 15:44:15,756 INFO L78 Accepts]: Start accepts. Automaton has 7950 states and 27750 transitions. Word has length 30 [2022-01-28 15:44:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:15,756 INFO L470 AbstractCegarLoop]: Abstraction has 7950 states and 27750 transitions. [2022-01-28 15:44:15,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 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) [2022-01-28 15:44:15,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7950 states and 27750 transitions. [2022-01-28 15:44:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:15,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:15,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:15,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-01-28 15:44:15,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:15,968 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:15,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:15,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1919935336, now seen corresponding path program 28 times [2022-01-28 15:44:15,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:15,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403008350] [2022-01-28 15:44:15,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:15,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:16,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:16,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403008350] [2022-01-28 15:44:16,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403008350] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:16,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229208137] [2022-01-28 15:44:16,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:44:16,198 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:16,199 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) [2022-01-28 15:44:16,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-01-28 15:44:16,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:44:16,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:16,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:44:16,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:16,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:44:16,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:16,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:16,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:16,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:17,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:17,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:17,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:44:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:17,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229208137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:17,185 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:17,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:44:17,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904710957] [2022-01-28 15:44:17,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:17,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:44:17,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:17,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:44:17,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:44:17,186 INFO L87 Difference]: Start difference. First operand 7950 states and 27750 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:44:20,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:20,109 INFO L93 Difference]: Finished difference Result 11223 states and 36565 transitions. [2022-01-28 15:44:20,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-28 15:44:20,110 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) Word has length 30 [2022-01-28 15:44:20,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:20,131 INFO L225 Difference]: With dead ends: 11223 [2022-01-28 15:44:20,131 INFO L226 Difference]: Without dead ends: 11208 [2022-01-28 15:44:20,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=804, Invalid=5676, Unknown=0, NotChecked=0, Total=6480 [2022-01-28 15:44:20,132 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 400 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 2746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:20,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 617 Invalid, 2746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 2566 Invalid, 0 Unknown, 72 Unchecked, 1.0s Time] [2022-01-28 15:44:20,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2022-01-28 15:44:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 7954. [2022-01-28 15:44:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7954 states, 7953 states have (on average 3.490883943166101) internal successors, (27763), 7953 states have internal predecessors, (27763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:20,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7954 states to 7954 states and 27763 transitions. [2022-01-28 15:44:20,315 INFO L78 Accepts]: Start accepts. Automaton has 7954 states and 27763 transitions. Word has length 30 [2022-01-28 15:44:20,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:20,315 INFO L470 AbstractCegarLoop]: Abstraction has 7954 states and 27763 transitions. [2022-01-28 15:44:20,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:44:20,315 INFO L276 IsEmpty]: Start isEmpty. Operand 7954 states and 27763 transitions. [2022-01-28 15:44:20,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:20,326 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:20,326 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:20,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-01-28 15:44:20,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:20,527 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:20,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:20,527 INFO L85 PathProgramCache]: Analyzing trace with hash -676155958, now seen corresponding path program 29 times [2022-01-28 15:44:20,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:20,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246143386] [2022-01-28 15:44:20,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:20,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:20,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246143386] [2022-01-28 15:44:20,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246143386] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378878476] [2022-01-28 15:44:20,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:44:20,747 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:20,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:20,748 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) [2022-01-28 15:44:20,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-01-28 15:44:20,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:44:20,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:20,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:44:20,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:21,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:21,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:21,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:44:21,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:21,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:21,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:21,438 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:21,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:21,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:21,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:21,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:21,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:44:21,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:21,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378878476] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:21,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:21,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 31 [2022-01-28 15:44:21,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688279131] [2022-01-28 15:44:21,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:21,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:44:21,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:21,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:44:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:44:21,760 INFO L87 Difference]: Start difference. First operand 7954 states and 27763 transitions. Second operand has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:24,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:24,680 INFO L93 Difference]: Finished difference Result 11216 states and 36544 transitions. [2022-01-28 15:44:24,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-28 15:44:24,680 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:44:24,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:24,701 INFO L225 Difference]: With dead ends: 11216 [2022-01-28 15:44:24,701 INFO L226 Difference]: Without dead ends: 11209 [2022-01-28 15:44:24,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=819, Invalid=5823, Unknown=0, NotChecked=0, Total=6642 [2022-01-28 15:44:24,702 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 442 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 2505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:24,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 553 Invalid, 2505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2282 Invalid, 0 Unknown, 126 Unchecked, 1.0s Time] [2022-01-28 15:44:24,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11209 states. [2022-01-28 15:44:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11209 to 7939. [2022-01-28 15:44:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7939 states, 7938 states have (on average 3.491811539430587) internal successors, (27718), 7938 states have internal predecessors, (27718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:24,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7939 states to 7939 states and 27718 transitions. [2022-01-28 15:44:24,857 INFO L78 Accepts]: Start accepts. Automaton has 7939 states and 27718 transitions. Word has length 30 [2022-01-28 15:44:24,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:24,857 INFO L470 AbstractCegarLoop]: Abstraction has 7939 states and 27718 transitions. [2022-01-28 15:44:24,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.129032258064516) internal successors, (66), 31 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:24,857 INFO L276 IsEmpty]: Start isEmpty. Operand 7939 states and 27718 transitions. [2022-01-28 15:44:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:24,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:24,868 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:24,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-01-28 15:44:25,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:25,068 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:25,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:25,069 INFO L85 PathProgramCache]: Analyzing trace with hash 307321644, now seen corresponding path program 30 times [2022-01-28 15:44:25,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:25,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458949044] [2022-01-28 15:44:25,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:25,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:25,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:25,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458949044] [2022-01-28 15:44:25,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458949044] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:25,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878135056] [2022-01-28 15:44:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:44:25,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:25,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:25,313 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) [2022-01-28 15:44:25,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-01-28 15:44:25,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:44:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:44:25,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:25,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:25,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:25,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:44:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:25,967 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:44:25,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:26,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:26,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:26,128 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:26,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:44:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:26,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878135056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:26,277 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:26,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-01-28 15:44:26,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103298318] [2022-01-28 15:44:26,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:26,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:44:26,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:26,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:44:26,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=876, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:44:26,278 INFO L87 Difference]: Start difference. First operand 7939 states and 27718 transitions. Second operand has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 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) [2022-01-28 15:44:32,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:32,115 INFO L93 Difference]: Finished difference Result 14380 states and 46557 transitions. [2022-01-28 15:44:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-28 15:44:32,115 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 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) Word has length 30 [2022-01-28 15:44:32,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:32,142 INFO L225 Difference]: With dead ends: 14380 [2022-01-28 15:44:32,142 INFO L226 Difference]: Without dead ends: 14276 [2022-01-28 15:44:32,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5527 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1656, Invalid=14856, Unknown=0, NotChecked=0, Total=16512 [2022-01-28 15:44:32,143 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 616 mSDsluCounter, 1531 mSDsCounter, 0 mSdLazyCounter, 3922 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 4081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 3922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:32,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 914 Invalid, 4081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 3922 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:44:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14276 states. [2022-01-28 15:44:32,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14276 to 7907. [2022-01-28 15:44:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7907 states, 7906 states have (on average 3.4903870478117884) internal successors, (27595), 7906 states have internal predecessors, (27595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:32,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7907 states to 7907 states and 27595 transitions. [2022-01-28 15:44:32,329 INFO L78 Accepts]: Start accepts. Automaton has 7907 states and 27595 transitions. Word has length 30 [2022-01-28 15:44:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:32,329 INFO L470 AbstractCegarLoop]: Abstraction has 7907 states and 27595 transitions. [2022-01-28 15:44:32,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.34375) internal successors, (75), 32 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) [2022-01-28 15:44:32,329 INFO L276 IsEmpty]: Start isEmpty. Operand 7907 states and 27595 transitions. [2022-01-28 15:44:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:32,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:32,341 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:32,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-01-28 15:44:32,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:32,541 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1191091408, now seen corresponding path program 31 times [2022-01-28 15:44:32,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:32,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127648860] [2022-01-28 15:44:32,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:32,542 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:32,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127648860] [2022-01-28 15:44:32,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127648860] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:32,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359502850] [2022-01-28 15:44:32,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:44:32,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:32,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:32,773 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) [2022-01-28 15:44:32,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-01-28 15:44:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:44:32,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:33,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:44:33,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:33,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:33,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:33,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:33,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:33,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:33,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:33,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:44:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:33,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359502850] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:33,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:33,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:44:33,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866052243] [2022-01-28 15:44:33,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:33,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:44:33,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:44:33,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:44:33,692 INFO L87 Difference]: Start difference. First operand 7907 states and 27595 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:39,522 INFO L93 Difference]: Finished difference Result 13265 states and 43605 transitions. [2022-01-28 15:44:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-28 15:44:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:44:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:39,549 INFO L225 Difference]: With dead ends: 13265 [2022-01-28 15:44:39,550 INFO L226 Difference]: Without dead ends: 13235 [2022-01-28 15:44:39,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4645 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1456, Invalid=12350, Unknown=0, NotChecked=0, Total=13806 [2022-01-28 15:44:39,551 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 417 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 4997 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:39,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [417 Valid, 1038 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4997 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-28 15:44:39,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13235 states. [2022-01-28 15:44:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13235 to 7908. [2022-01-28 15:44:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7908 states, 7907 states have (on average 3.490451498672063) internal successors, (27599), 7907 states have internal predecessors, (27599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 27599 transitions. [2022-01-28 15:44:39,757 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 27599 transitions. Word has length 30 [2022-01-28 15:44:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:39,757 INFO L470 AbstractCegarLoop]: Abstraction has 7908 states and 27599 transitions. [2022-01-28 15:44:39,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 27599 transitions. [2022-01-28 15:44:39,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:39,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:39,768 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:39,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-01-28 15:44:39,969 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,SelfDestructingSolverStorable95 [2022-01-28 15:44:39,969 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:39,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:39,970 INFO L85 PathProgramCache]: Analyzing trace with hash 322859476, now seen corresponding path program 32 times [2022-01-28 15:44:39,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:39,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224997892] [2022-01-28 15:44:39,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:39,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:40,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:40,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224997892] [2022-01-28 15:44:40,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224997892] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:40,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444922638] [2022-01-28 15:44:40,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:44:40,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:40,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:40,219 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) [2022-01-28 15:44:40,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-01-28 15:44:40,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:44:40,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:44:40,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:40,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:40,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:40,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:44:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:40,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:40,828 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:44:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:44:40,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:40,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:40,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:40,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:44:41,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:41,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444922638] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:41,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:41,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 31 [2022-01-28 15:44:41,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140729072] [2022-01-28 15:44:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:41,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:44:41,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:41,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:44:41,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:44:41,122 INFO L87 Difference]: Start difference. First operand 7908 states and 27599 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-01-28 15:44:47,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:47,637 INFO L93 Difference]: Finished difference Result 14966 states and 49529 transitions. [2022-01-28 15:44:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-28 15:44:47,637 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) Word has length 30 [2022-01-28 15:44:47,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:47,666 INFO L225 Difference]: With dead ends: 14966 [2022-01-28 15:44:47,666 INFO L226 Difference]: Without dead ends: 14907 [2022-01-28 15:44:47,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5179 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1832, Invalid=13668, Unknown=0, NotChecked=0, Total=15500 [2022-01-28 15:44:47,667 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 633 mSDsluCounter, 1586 mSDsCounter, 0 mSdLazyCounter, 4127 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 4399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 4127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:47,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 935 Invalid, 4399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 4127 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-28 15:44:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14907 states. [2022-01-28 15:44:47,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14907 to 7894. [2022-01-28 15:44:47,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7894 states, 7893 states have (on average 3.4900544786519703) internal successors, (27547), 7893 states have internal predecessors, (27547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7894 states to 7894 states and 27547 transitions. [2022-01-28 15:44:47,863 INFO L78 Accepts]: Start accepts. Automaton has 7894 states and 27547 transitions. Word has length 30 [2022-01-28 15:44:47,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:47,863 INFO L470 AbstractCegarLoop]: Abstraction has 7894 states and 27547 transitions. [2022-01-28 15:44:47,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-01-28 15:44:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7894 states and 27547 transitions. [2022-01-28 15:44:47,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:44:47,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:47,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:47,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-01-28 15:44:48,075 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,SelfDestructingSolverStorable96 [2022-01-28 15:44:48,075 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:44:48,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:48,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2106064954, now seen corresponding path program 33 times [2022-01-28 15:44:48,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:48,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86879119] [2022-01-28 15:44:48,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:48,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:48,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:48,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86879119] [2022-01-28 15:44:48,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86879119] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:48,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826046610] [2022-01-28 15:44:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:44:48,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:48,323 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) [2022-01-28 15:44:48,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-01-28 15:44:48,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:44:48,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:48,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:44:48,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:48,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:48,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:48,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:44:49,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:49,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:49,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:49,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:49,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:49,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2022-01-28 15:44:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:49,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826046610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:49,709 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:49,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-01-28 15:44:49,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138205291] [2022-01-28 15:44:49,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:49,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:44:49,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:49,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:44:49,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:44:49,710 INFO L87 Difference]: Start difference. First operand 7894 states and 27547 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) [2022-01-28 15:45:04,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:04,653 INFO L93 Difference]: Finished difference Result 16939 states and 56243 transitions. [2022-01-28 15:45:04,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2022-01-28 15:45:04,653 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) Word has length 30 [2022-01-28 15:45:04,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:04,714 INFO L225 Difference]: With dead ends: 16939 [2022-01-28 15:45:04,715 INFO L226 Difference]: Without dead ends: 16925 [2022-01-28 15:45:04,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25841 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=5894, Invalid=56356, Unknown=0, NotChecked=0, Total=62250 [2022-01-28 15:45:04,717 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 719 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 4220 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1354 SdHoareTripleChecker+Invalid, 8257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3819 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:04,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1354 Invalid, 8257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4220 Invalid, 0 Unknown, 3819 Unchecked, 2.0s Time] [2022-01-28 15:45:04,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16925 states. [2022-01-28 15:45:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16925 to 7988. [2022-01-28 15:45:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7988 states, 7987 states have (on average 3.493552022035808) internal successors, (27903), 7987 states have internal predecessors, (27903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:04,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7988 states to 7988 states and 27903 transitions. [2022-01-28 15:45:04,908 INFO L78 Accepts]: Start accepts. Automaton has 7988 states and 27903 transitions. Word has length 30 [2022-01-28 15:45:04,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:04,909 INFO L470 AbstractCegarLoop]: Abstraction has 7988 states and 27903 transitions. [2022-01-28 15:45:04,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) [2022-01-28 15:45:04,909 INFO L276 IsEmpty]: Start isEmpty. Operand 7988 states and 27903 transitions. [2022-01-28 15:45:04,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:04,920 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:04,920 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:04,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-01-28 15:45:05,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:05,121 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:05,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:05,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1098969922, now seen corresponding path program 34 times [2022-01-28 15:45:05,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187396689] [2022-01-28 15:45:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:05,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:05,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:05,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187396689] [2022-01-28 15:45:05,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187396689] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141206738] [2022-01-28 15:45:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:45:05,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:05,365 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) [2022-01-28 15:45:05,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-01-28 15:45:05,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:45:05,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:45:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:05,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:05,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:05,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:45:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:05,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:05,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:06,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:06,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:45:06,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:06,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:06,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:06,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:45:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:06,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141206738] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:06,306 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:06,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-01-28 15:45:06,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506805311] [2022-01-28 15:45:06,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:45:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:45:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:45:06,306 INFO L87 Difference]: Start difference. First operand 7988 states and 27903 transitions. Second operand has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:09,292 INFO L93 Difference]: Finished difference Result 12288 states and 40479 transitions. [2022-01-28 15:45:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-28 15:45:09,292 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:45:09,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:09,316 INFO L225 Difference]: With dead ends: 12288 [2022-01-28 15:45:09,316 INFO L226 Difference]: Without dead ends: 12258 [2022-01-28 15:45:09,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2226 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=901, Invalid=6071, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:45:09,317 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 420 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 2250 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:09,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 501 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2250 Invalid, 0 Unknown, 70 Unchecked, 1.0s Time] [2022-01-28 15:45:09,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2022-01-28 15:45:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 7986. [2022-01-28 15:45:09,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7986 states, 7985 states have (on average 3.4936756418284283) internal successors, (27897), 7985 states have internal predecessors, (27897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7986 states to 7986 states and 27897 transitions. [2022-01-28 15:45:09,530 INFO L78 Accepts]: Start accepts. Automaton has 7986 states and 27897 transitions. Word has length 30 [2022-01-28 15:45:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:09,530 INFO L470 AbstractCegarLoop]: Abstraction has 7986 states and 27897 transitions. [2022-01-28 15:45:09,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.09375) internal successors, (67), 32 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 7986 states and 27897 transitions. [2022-01-28 15:45:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:09,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:09,541 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:09,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-01-28 15:45:09,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:09,741 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1043516226, now seen corresponding path program 35 times [2022-01-28 15:45:09,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110121577] [2022-01-28 15:45:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:09,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:09,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:09,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110121577] [2022-01-28 15:45:09,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110121577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146373374] [2022-01-28 15:45:09,960 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:45:09,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:09,961 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) [2022-01-28 15:45:09,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-01-28 15:45:09,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:45:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:45:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:10,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:10,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:10,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:45:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:10,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:10,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:10,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:10,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:45:10,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:10,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:10,732 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:10,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:45:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:10,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146373374] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:10,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:10,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-28 15:45:10,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667876513] [2022-01-28 15:45:10,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:10,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:45:10,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:45:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:45:10,880 INFO L87 Difference]: Start difference. First operand 7986 states and 27897 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:14,894 INFO L93 Difference]: Finished difference Result 12584 states and 41504 transitions. [2022-01-28 15:45:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-28 15:45:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:45:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:14,918 INFO L225 Difference]: With dead ends: 12584 [2022-01-28 15:45:14,918 INFO L226 Difference]: Without dead ends: 12554 [2022-01-28 15:45:14,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2597 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1088, Invalid=7102, Unknown=0, NotChecked=0, Total=8190 [2022-01-28 15:45:14,920 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 413 mSDsluCounter, 1155 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 679 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:14,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [413 Valid, 648 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2472 Invalid, 0 Unknown, 679 Unchecked, 1.1s Time] [2022-01-28 15:45:14,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12554 states. [2022-01-28 15:45:15,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12554 to 7990. [2022-01-28 15:45:15,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7990 states, 7989 states have (on average 3.493929152584804) internal successors, (27913), 7989 states have internal predecessors, (27913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7990 states to 7990 states and 27913 transitions. [2022-01-28 15:45:15,111 INFO L78 Accepts]: Start accepts. Automaton has 7990 states and 27913 transitions. Word has length 30 [2022-01-28 15:45:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:15,111 INFO L470 AbstractCegarLoop]: Abstraction has 7990 states and 27913 transitions. [2022-01-28 15:45:15,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 7990 states and 27913 transitions. [2022-01-28 15:45:15,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:15,123 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:15,123 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:15,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-01-28 15:45:15,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:15,324 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:15,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:15,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1445902934, now seen corresponding path program 36 times [2022-01-28 15:45:15,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:15,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284686284] [2022-01-28 15:45:15,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:15,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:15,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:15,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284686284] [2022-01-28 15:45:15,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284686284] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:15,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363837794] [2022-01-28 15:45:15,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:45:15,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:15,587 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) [2022-01-28 15:45:15,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-01-28 15:45:15,607 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:45:15,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:15,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:45:15,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:15,869 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:45:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:15,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:16,350 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:45:16,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:45:16,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:16,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:16,488 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:45:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:16,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363837794] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:16,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:16,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 36 [2022-01-28 15:45:16,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138671262] [2022-01-28 15:45:16,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:16,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-28 15:45:16,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-28 15:45:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:45:16,657 INFO L87 Difference]: Start difference. First operand 7990 states and 27913 transitions. Second operand has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2022-01-28 15:45:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:28,046 INFO L93 Difference]: Finished difference Result 15340 states and 50459 transitions. [2022-01-28 15:45:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-01-28 15:45:28,046 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) Word has length 30 [2022-01-28 15:45:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:28,079 INFO L225 Difference]: With dead ends: 15340 [2022-01-28 15:45:28,079 INFO L226 Difference]: Without dead ends: 15280 [2022-01-28 15:45:28,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12870 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=4758, Invalid=28914, Unknown=0, NotChecked=0, Total=33672 [2022-01-28 15:45:28,081 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 959 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 4011 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 959 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 4544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 4011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:28,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [959 Valid, 839 Invalid, 4544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 4011 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-28 15:45:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2022-01-28 15:45:28,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 8005. [2022-01-28 15:45:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8005 states, 8004 states have (on average 3.4942528735632186) internal successors, (27968), 8004 states have internal predecessors, (27968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:28,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8005 states to 8005 states and 27968 transitions. [2022-01-28 15:45:28,297 INFO L78 Accepts]: Start accepts. Automaton has 8005 states and 27968 transitions. Word has length 30 [2022-01-28 15:45:28,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:28,297 INFO L470 AbstractCegarLoop]: Abstraction has 8005 states and 27968 transitions. [2022-01-28 15:45:28,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9722222222222223) internal successors, (71), 36 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) [2022-01-28 15:45:28,297 INFO L276 IsEmpty]: Start isEmpty. Operand 8005 states and 27968 transitions. [2022-01-28 15:45:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:28,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:28,309 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:28,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-01-28 15:45:28,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-01-28 15:45:28,509 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:28,510 INFO L85 PathProgramCache]: Analyzing trace with hash -966873262, now seen corresponding path program 37 times [2022-01-28 15:45:28,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:28,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178001013] [2022-01-28 15:45:28,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:28,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:28,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:28,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:28,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178001013] [2022-01-28 15:45:28,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178001013] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:28,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442720333] [2022-01-28 15:45:28,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:45:28,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:28,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:28,812 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) [2022-01-28 15:45:28,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-01-28 15:45:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:28,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:45:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:29,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:29,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:45:29,158 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:29,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:29,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:29,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:29,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:45:29,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:29,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:29,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:29,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:45:29,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:29,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442720333] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:29,748 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:29,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-28 15:45:29,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889649550] [2022-01-28 15:45:29,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:29,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:45:29,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:29,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:45:29,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:45:29,749 INFO L87 Difference]: Start difference. First operand 8005 states and 27968 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:31,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:31,805 INFO L93 Difference]: Finished difference Result 12138 states and 40211 transitions. [2022-01-28 15:45:31,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-28 15:45:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:45:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:31,830 INFO L225 Difference]: With dead ends: 12138 [2022-01-28 15:45:31,830 INFO L226 Difference]: Without dead ends: 12108 [2022-01-28 15:45:31,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1397 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=684, Invalid=3872, Unknown=0, NotChecked=0, Total=4556 [2022-01-28 15:45:31,831 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 393 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 2137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 452 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:31,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 387 Invalid, 2137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1575 Invalid, 0 Unknown, 452 Unchecked, 0.7s Time] [2022-01-28 15:45:31,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12108 states. [2022-01-28 15:45:31,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12108 to 8023. [2022-01-28 15:45:32,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8023 states, 8022 states have (on average 3.494141111942159) internal successors, (28030), 8022 states have internal predecessors, (28030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8023 states to 8023 states and 28030 transitions. [2022-01-28 15:45:32,018 INFO L78 Accepts]: Start accepts. Automaton has 8023 states and 28030 transitions. Word has length 30 [2022-01-28 15:45:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:32,018 INFO L470 AbstractCegarLoop]: Abstraction has 8023 states and 28030 transitions. [2022-01-28 15:45:32,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 8023 states and 28030 transitions. [2022-01-28 15:45:32,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:32,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:32,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:32,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:32,230 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,SelfDestructingSolverStorable101 [2022-01-28 15:45:32,230 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:32,231 INFO L85 PathProgramCache]: Analyzing trace with hash 838674874, now seen corresponding path program 38 times [2022-01-28 15:45:32,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:32,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369366081] [2022-01-28 15:45:32,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:32,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:32,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369366081] [2022-01-28 15:45:32,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369366081] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:32,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54834370] [2022-01-28 15:45:32,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:45:32,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:32,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:32,518 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) [2022-01-28 15:45:32,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-01-28 15:45:32,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:45:32,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:45:32,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:32,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:32,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:32,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:45:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:32,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:33,177 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:45:33,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:45:33,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:33,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:33,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:33,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:45:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:33,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54834370] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:33,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:33,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-01-28 15:45:33,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856184765] [2022-01-28 15:45:33,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:33,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:45:33,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:33,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:45:33,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:45:33,504 INFO L87 Difference]: Start difference. First operand 8023 states and 28030 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:45:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:38,233 INFO L93 Difference]: Finished difference Result 14776 states and 49012 transitions. [2022-01-28 15:45:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-28 15:45:38,233 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) Word has length 30 [2022-01-28 15:45:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:38,266 INFO L225 Difference]: With dead ends: 14776 [2022-01-28 15:45:38,266 INFO L226 Difference]: Without dead ends: 14687 [2022-01-28 15:45:38,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1336, Invalid=10006, Unknown=0, NotChecked=0, Total=11342 [2022-01-28 15:45:38,267 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 537 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 3289 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 3532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 3289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:38,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 761 Invalid, 3532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 3289 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-28 15:45:38,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14687 states. [2022-01-28 15:45:38,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14687 to 7980. [2022-01-28 15:45:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7980 states, 7979 states have (on average 3.4939215440531397) internal successors, (27878), 7979 states have internal predecessors, (27878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:38,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7980 states to 7980 states and 27878 transitions. [2022-01-28 15:45:38,454 INFO L78 Accepts]: Start accepts. Automaton has 7980 states and 27878 transitions. Word has length 30 [2022-01-28 15:45:38,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:38,454 INFO L470 AbstractCegarLoop]: Abstraction has 7980 states and 27878 transitions. [2022-01-28 15:45:38,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:45:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7980 states and 27878 transitions. [2022-01-28 15:45:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:38,466 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:38,466 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:38,481 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-01-28 15:45:38,666 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,SelfDestructingSolverStorable102 [2022-01-28 15:45:38,667 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:38,667 INFO L85 PathProgramCache]: Analyzing trace with hash 460538431, now seen corresponding path program 30 times [2022-01-28 15:45:38,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:38,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647087039] [2022-01-28 15:45:38,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:38,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:38,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:38,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647087039] [2022-01-28 15:45:38,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647087039] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:38,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349049022] [2022-01-28 15:45:38,783 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:45:38,783 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:38,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:38,784 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) [2022-01-28 15:45:38,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-01-28 15:45:38,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:45:38,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:38,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:45:38,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:39,071 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:39,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:45:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:39,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:39,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:39,830 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:39,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 65 [2022-01-28 15:45:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:40,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349049022] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:40,156 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:40,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 14] total 31 [2022-01-28 15:45:40,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993284209] [2022-01-28 15:45:40,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:40,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:45:40,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:40,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:45:40,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:45:40,157 INFO L87 Difference]: Start difference. First operand 7980 states and 27878 transitions. Second operand has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-01-28 15:45:44,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:44,535 INFO L93 Difference]: Finished difference Result 13680 states and 46185 transitions. [2022-01-28 15:45:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-28 15:45:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) Word has length 30 [2022-01-28 15:45:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:44,566 INFO L225 Difference]: With dead ends: 13680 [2022-01-28 15:45:44,567 INFO L226 Difference]: Without dead ends: 13650 [2022-01-28 15:45:44,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 52 SyntacticMatches, 10 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3632 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1293, Invalid=9419, Unknown=0, NotChecked=0, Total=10712 [2022-01-28 15:45:44,568 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 540 mSDsluCounter, 1311 mSDsCounter, 0 mSdLazyCounter, 1555 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 3601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1915 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:44,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 757 Invalid, 3601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1555 Invalid, 0 Unknown, 1915 Unchecked, 0.7s Time] [2022-01-28 15:45:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13650 states. [2022-01-28 15:45:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13650 to 8144. [2022-01-28 15:45:44,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8144 states, 8143 states have (on average 3.4924475009210365) internal successors, (28439), 8143 states have internal predecessors, (28439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:44,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8144 states to 8144 states and 28439 transitions. [2022-01-28 15:45:44,761 INFO L78 Accepts]: Start accepts. Automaton has 8144 states and 28439 transitions. Word has length 30 [2022-01-28 15:45:44,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:44,761 INFO L470 AbstractCegarLoop]: Abstraction has 8144 states and 28439 transitions. [2022-01-28 15:45:44,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4838709677419355) internal successors, (77), 31 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) [2022-01-28 15:45:44,761 INFO L276 IsEmpty]: Start isEmpty. Operand 8144 states and 28439 transitions. [2022-01-28 15:45:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:45:44,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:44,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:44,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:44,973 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,SelfDestructingSolverStorable103 [2022-01-28 15:45:44,973 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:45:44,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:44,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1852709708, now seen corresponding path program 39 times [2022-01-28 15:45:44,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:44,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044983663] [2022-01-28 15:45:44,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:44,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:45,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044983663] [2022-01-28 15:45:45,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044983663] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:45,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351694008] [2022-01-28 15:45:45,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:45:45,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:45,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:45,275 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) [2022-01-28 15:45:45,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-01-28 15:45:45,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:45:45,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:45,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:45:45,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:45,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:45,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:45,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:45:45,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:45,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:46,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:46,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:46,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:45:46,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2022-01-28 15:45:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351694008] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:46,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:46,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-28 15:45:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043789848] [2022-01-28 15:45:46,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:46,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:45:46,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:46,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:45:46,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:45:46,448 INFO L87 Difference]: Start difference. First operand 8144 states and 28439 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:46:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:01,466 INFO L93 Difference]: Finished difference Result 15771 states and 51269 transitions. [2022-01-28 15:46:01,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-01-28 15:46:01,467 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 30 [2022-01-28 15:46:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:01,501 INFO L225 Difference]: With dead ends: 15771 [2022-01-28 15:46:01,501 INFO L226 Difference]: Without dead ends: 15696 [2022-01-28 15:46:01,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21278 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=4487, Invalid=50973, Unknown=0, NotChecked=0, Total=55460 [2022-01-28 15:46:01,503 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 893 mSDsluCounter, 2704 mSDsCounter, 0 mSdLazyCounter, 4112 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 893 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 7311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 4112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2948 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:01,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [893 Valid, 1335 Invalid, 7311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 4112 Invalid, 0 Unknown, 2948 Unchecked, 1.9s Time] [2022-01-28 15:46:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15696 states. [2022-01-28 15:46:01,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15696 to 8368. [2022-01-28 15:46:01,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8368 states, 8367 states have (on average 3.5020915501374446) internal successors, (29302), 8367 states have internal predecessors, (29302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8368 states to 8368 states and 29302 transitions. [2022-01-28 15:46:01,730 INFO L78 Accepts]: Start accepts. Automaton has 8368 states and 29302 transitions. Word has length 30 [2022-01-28 15:46:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:01,730 INFO L470 AbstractCegarLoop]: Abstraction has 8368 states and 29302 transitions. [2022-01-28 15:46:01,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:46:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8368 states and 29302 transitions. [2022-01-28 15:46:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:01,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:01,744 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:01,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-01-28 15:46:01,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:01,945 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:01,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash 561845058, now seen corresponding path program 40 times [2022-01-28 15:46:01,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:01,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769573187] [2022-01-28 15:46:01,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:01,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:01,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:02,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:02,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769573187] [2022-01-28 15:46:02,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769573187] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467562487] [2022-01-28 15:46:02,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:46:02,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:02,200 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) [2022-01-28 15:46:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-01-28 15:46:02,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:46:02,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:02,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:46:02,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:02,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:02,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:46:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:02,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:02,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:02,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:02,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:46:02,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:02,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:02,990 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:02,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:46:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:03,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467562487] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:03,162 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:03,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 32 [2022-01-28 15:46:03,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412696504] [2022-01-28 15:46:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:03,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:46:03,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:03,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:46:03,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:46:03,163 INFO L87 Difference]: Start difference. First operand 8368 states and 29302 transitions. Second operand has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:09,743 INFO L93 Difference]: Finished difference Result 13412 states and 42952 transitions. [2022-01-28 15:46:09,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-28 15:46:09,743 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:09,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:09,769 INFO L225 Difference]: With dead ends: 13412 [2022-01-28 15:46:09,770 INFO L226 Difference]: Without dead ends: 13346 [2022-01-28 15:46:09,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8767 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2169, Invalid=21393, Unknown=0, NotChecked=0, Total=23562 [2022-01-28 15:46:09,771 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 721 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 3771 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 3972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 3771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:09,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [721 Valid, 884 Invalid, 3972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 3771 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:46:09,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13346 states. [2022-01-28 15:46:09,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13346 to 8386. [2022-01-28 15:46:09,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8386 states, 8385 states have (on average 3.5042337507453785) internal successors, (29383), 8385 states have internal predecessors, (29383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:09,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8386 states to 8386 states and 29383 transitions. [2022-01-28 15:46:09,958 INFO L78 Accepts]: Start accepts. Automaton has 8386 states and 29383 transitions. Word has length 30 [2022-01-28 15:46:09,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:09,958 INFO L470 AbstractCegarLoop]: Abstraction has 8386 states and 29383 transitions. [2022-01-28 15:46:09,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0625) internal successors, (66), 32 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:09,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8386 states and 29383 transitions. [2022-01-28 15:46:09,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:09,970 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:09,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:09,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-01-28 15:46:10,171 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,SelfDestructingSolverStorable105 [2022-01-28 15:46:10,171 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:10,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash 213416747, now seen corresponding path program 31 times [2022-01-28 15:46:10,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:10,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645076117] [2022-01-28 15:46:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:10,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:10,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:10,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645076117] [2022-01-28 15:46:10,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645076117] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:10,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613284497] [2022-01-28 15:46:10,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:46:10,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:10,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:10,314 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) [2022-01-28 15:46:10,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-01-28 15:46:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:10,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:46:10,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:10,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:10,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:10,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:46:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:10,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:10,764 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:10,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:46:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:10,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:10,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:10,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-01-28 15:46:10,838 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:10,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613284497] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:10,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:10,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-28 15:46:10,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366651043] [2022-01-28 15:46:10,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:10,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:46:10,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:46:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:46:10,840 INFO L87 Difference]: Start difference. First operand 8386 states and 29383 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:11,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:11,129 INFO L93 Difference]: Finished difference Result 9442 states and 32623 transitions. [2022-01-28 15:46:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:46:11,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:11,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:11,149 INFO L225 Difference]: With dead ends: 9442 [2022-01-28 15:46:11,149 INFO L226 Difference]: Without dead ends: 9367 [2022-01-28 15:46:11,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:46:11,149 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 122 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:11,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 393 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 483 Invalid, 0 Unknown, 98 Unchecked, 0.2s Time] [2022-01-28 15:46:11,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9367 states. [2022-01-28 15:46:11,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9367 to 8586. [2022-01-28 15:46:11,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8586 states, 8585 states have (on average 3.496913220733838) internal successors, (30021), 8585 states have internal predecessors, (30021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:11,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8586 states to 8586 states and 30021 transitions. [2022-01-28 15:46:11,358 INFO L78 Accepts]: Start accepts. Automaton has 8586 states and 30021 transitions. Word has length 30 [2022-01-28 15:46:11,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:11,358 INFO L470 AbstractCegarLoop]: Abstraction has 8586 states and 30021 transitions. [2022-01-28 15:46:11,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:11,359 INFO L276 IsEmpty]: Start isEmpty. Operand 8586 states and 30021 transitions. [2022-01-28 15:46:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:11,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:11,371 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:11,386 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-01-28 15:46:11,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:11,583 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:11,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1864293749, now seen corresponding path program 32 times [2022-01-28 15:46:11,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:11,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2566659] [2022-01-28 15:46:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:11,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:11,709 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:11,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2566659] [2022-01-28 15:46:11,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2566659] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:11,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995852069] [2022-01-28 15:46:11,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:46:11,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:11,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:11,711 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) [2022-01-28 15:46:11,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-01-28 15:46:11,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:46:11,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:11,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:46:11,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:11,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:11,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:11,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:46:12,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:12,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:12,161 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:12,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:46:12,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:12,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:12,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:12,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-01-28 15:46:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:12,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995852069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:12,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:12,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-28 15:46:12,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663790286] [2022-01-28 15:46:12,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:12,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:46:12,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:46:12,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:46:12,249 INFO L87 Difference]: Start difference. First operand 8586 states and 30021 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:12,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:12,521 INFO L93 Difference]: Finished difference Result 9773 states and 33629 transitions. [2022-01-28 15:46:12,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:46:12,521 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:12,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:12,541 INFO L225 Difference]: With dead ends: 9773 [2022-01-28 15:46:12,541 INFO L226 Difference]: Without dead ends: 9691 [2022-01-28 15:46:12,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:46:12,542 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 172 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:12,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 359 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 417 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-01-28 15:46:12,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9691 states. [2022-01-28 15:46:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9691 to 8528. [2022-01-28 15:46:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8528 states, 8527 states have (on average 3.499824088190454) internal successors, (29843), 8527 states have internal predecessors, (29843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:12,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8528 states to 8528 states and 29843 transitions. [2022-01-28 15:46:12,788 INFO L78 Accepts]: Start accepts. Automaton has 8528 states and 29843 transitions. Word has length 30 [2022-01-28 15:46:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:12,788 INFO L470 AbstractCegarLoop]: Abstraction has 8528 states and 29843 transitions. [2022-01-28 15:46:12,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 18 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8528 states and 29843 transitions. [2022-01-28 15:46:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:12,800 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:12,800 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:12,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-01-28 15:46:13,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:13,001 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:13,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:13,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1074348546, now seen corresponding path program 41 times [2022-01-28 15:46:13,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:13,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629196691] [2022-01-28 15:46:13,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:13,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:13,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:13,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629196691] [2022-01-28 15:46:13,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629196691] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:13,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446526068] [2022-01-28 15:46:13,277 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:46:13,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:13,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:13,278 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) [2022-01-28 15:46:13,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-01-28 15:46:13,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:46:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:13,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:46:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:13,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:13,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:13,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:46:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:13,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:13,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:46:13,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:13,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:14,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:14,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:46:14,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:14,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446526068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:14,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:14,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 28 [2022-01-28 15:46:14,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833120916] [2022-01-28 15:46:14,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:14,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:46:14,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:14,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:46:14,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:46:14,179 INFO L87 Difference]: Start difference. First operand 8528 states and 29843 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:21,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:21,337 INFO L93 Difference]: Finished difference Result 13913 states and 45401 transitions. [2022-01-28 15:46:21,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-28 15:46:21,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:21,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:21,370 INFO L225 Difference]: With dead ends: 13913 [2022-01-28 15:46:21,370 INFO L226 Difference]: Without dead ends: 13862 [2022-01-28 15:46:21,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8143 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2226, Invalid=19530, Unknown=0, NotChecked=0, Total=21756 [2022-01-28 15:46:21,371 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 508 mSDsluCounter, 1640 mSDsCounter, 0 mSdLazyCounter, 4286 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 4286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:21,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 945 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 4286 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-28 15:46:21,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13862 states. [2022-01-28 15:46:21,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13862 to 8548. [2022-01-28 15:46:21,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8548 states, 8547 states have (on average 3.5005265005265005) internal successors, (29919), 8547 states have internal predecessors, (29919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8548 states to 8548 states and 29919 transitions. [2022-01-28 15:46:21,594 INFO L78 Accepts]: Start accepts. Automaton has 8548 states and 29919 transitions. Word has length 30 [2022-01-28 15:46:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:21,594 INFO L470 AbstractCegarLoop]: Abstraction has 8548 states and 29919 transitions. [2022-01-28 15:46:21,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 8548 states and 29919 transitions. [2022-01-28 15:46:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:21,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:21,608 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:21,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-01-28 15:46:21,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:21,808 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:21,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:21,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1447510914, now seen corresponding path program 42 times [2022-01-28 15:46:21,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:21,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003078137] [2022-01-28 15:46:21,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:21,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:21,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:22,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:22,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003078137] [2022-01-28 15:46:22,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003078137] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565265958] [2022-01-28 15:46:22,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:46:22,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:22,055 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) [2022-01-28 15:46:22,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-01-28 15:46:22,076 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:46:22,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:22,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:46:22,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:22,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:22,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:22,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:46:22,428 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:22,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:22,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:22,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:22,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:46:22,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:22,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:22,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:22,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:46:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:22,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565265958] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:22,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:22,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-28 15:46:22,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077836581] [2022-01-28 15:46:22,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:22,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:46:22,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:22,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:46:22,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:46:22,997 INFO L87 Difference]: Start difference. First operand 8548 states and 29919 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:34,426 INFO L93 Difference]: Finished difference Result 15305 states and 49411 transitions. [2022-01-28 15:46:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-01-28 15:46:34,427 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:34,460 INFO L225 Difference]: With dead ends: 15305 [2022-01-28 15:46:34,460 INFO L226 Difference]: Without dead ends: 15227 [2022-01-28 15:46:34,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20377 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=4887, Invalid=44619, Unknown=0, NotChecked=0, Total=49506 [2022-01-28 15:46:34,463 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 744 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1133 SdHoareTripleChecker+Invalid, 4999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:34,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [744 Valid, 1133 Invalid, 4999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-28 15:46:34,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15227 states. [2022-01-28 15:46:34,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15227 to 8509. [2022-01-28 15:46:34,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8509 states, 8508 states have (on average 3.4982369534555713) internal successors, (29763), 8508 states have internal predecessors, (29763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:34,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8509 states to 8509 states and 29763 transitions. [2022-01-28 15:46:34,689 INFO L78 Accepts]: Start accepts. Automaton has 8509 states and 29763 transitions. Word has length 30 [2022-01-28 15:46:34,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:34,689 INFO L470 AbstractCegarLoop]: Abstraction has 8509 states and 29763 transitions. [2022-01-28 15:46:34,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 8509 states and 29763 transitions. [2022-01-28 15:46:34,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:34,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:34,702 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:34,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-01-28 15:46:34,903 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,SelfDestructingSolverStorable109 [2022-01-28 15:46:34,903 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:34,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1086413148, now seen corresponding path program 43 times [2022-01-28 15:46:34,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:34,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630620129] [2022-01-28 15:46:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:34,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:34,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:35,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630620129] [2022-01-28 15:46:35,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630620129] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:35,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811960420] [2022-01-28 15:46:35,299 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:46:35,299 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:35,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:35,301 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) [2022-01-28 15:46:35,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-01-28 15:46:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:46:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:35,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:35,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:46:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:35,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:35,880 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:35,894 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:35,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:46:36,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:36,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:36,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:36,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:46:36,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:36,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811960420] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:36,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:36,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2022-01-28 15:46:36,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186155538] [2022-01-28 15:46:36,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:36,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:46:36,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:46:36,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:46:36,266 INFO L87 Difference]: Start difference. First operand 8509 states and 29763 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:43,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:43,750 INFO L93 Difference]: Finished difference Result 13820 states and 45221 transitions. [2022-01-28 15:46:43,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-28 15:46:43,751 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:43,782 INFO L225 Difference]: With dead ends: 13820 [2022-01-28 15:46:43,783 INFO L226 Difference]: Without dead ends: 13691 [2022-01-28 15:46:43,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7054 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2159, Invalid=17581, Unknown=0, NotChecked=0, Total=19740 [2022-01-28 15:46:43,785 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 553 mSDsluCounter, 1697 mSDsCounter, 0 mSdLazyCounter, 4279 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 1020 SdHoareTripleChecker+Invalid, 4510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 4279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:43,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 1020 Invalid, 4510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 4279 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-28 15:46:43,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13691 states. [2022-01-28 15:46:43,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13691 to 8510. [2022-01-28 15:46:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8510 states, 8509 states have (on average 3.4980608767187684) internal successors, (29765), 8509 states have internal predecessors, (29765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 29765 transitions. [2022-01-28 15:46:44,019 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 29765 transitions. Word has length 30 [2022-01-28 15:46:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:44,020 INFO L470 AbstractCegarLoop]: Abstraction has 8510 states and 29765 transitions. [2022-01-28 15:46:44,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:44,020 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 29765 transitions. [2022-01-28 15:46:44,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:44,032 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:44,032 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:44,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-01-28 15:46:44,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:44,233 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:44,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1997859149, now seen corresponding path program 33 times [2022-01-28 15:46:44,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:44,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528405517] [2022-01-28 15:46:44,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:44,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:44,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528405517] [2022-01-28 15:46:44,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528405517] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028320659] [2022-01-28 15:46:44,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:46:44,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:44,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:44,350 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) [2022-01-28 15:46:44,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-01-28 15:46:44,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:46:44,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:44,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-28 15:46:44,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:44,658 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:44,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:46:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:44,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:45,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:45,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:46:45,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 40 treesize of output 65 [2022-01-28 15:46:45,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:45,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028320659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:45,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:45,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 37 [2022-01-28 15:46:45,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162485811] [2022-01-28 15:46:45,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:45,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-28 15:46:45,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-28 15:46:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:46:45,912 INFO L87 Difference]: Start difference. First operand 8510 states and 29765 transitions. Second operand has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:57,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:57,996 INFO L93 Difference]: Finished difference Result 29888 states and 100163 transitions. [2022-01-28 15:46:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-28 15:46:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:58,071 INFO L225 Difference]: With dead ends: 29888 [2022-01-28 15:46:58,071 INFO L226 Difference]: Without dead ends: 29809 [2022-01-28 15:46:58,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 40 SyntacticMatches, 11 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14316 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=5488, Invalid=30802, Unknown=0, NotChecked=0, Total=36290 [2022-01-28 15:46:58,072 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 1009 mSDsluCounter, 1562 mSDsCounter, 0 mSdLazyCounter, 3196 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1009 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 5676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 3196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2161 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:58,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1009 Valid, 811 Invalid, 5676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 3196 Invalid, 0 Unknown, 2161 Unchecked, 1.5s Time] [2022-01-28 15:46:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29809 states. [2022-01-28 15:46:58,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29809 to 8560. [2022-01-28 15:46:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8560 states, 8559 states have (on average 3.4998247458815284) internal successors, (29955), 8559 states have internal predecessors, (29955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8560 states to 8560 states and 29955 transitions. [2022-01-28 15:46:58,417 INFO L78 Accepts]: Start accepts. Automaton has 8560 states and 29955 transitions. Word has length 30 [2022-01-28 15:46:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 8560 states and 29955 transitions. [2022-01-28 15:46:58,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.1621621621621623) internal successors, (80), 37 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 8560 states and 29955 transitions. [2022-01-28 15:46:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:58,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:58,433 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:58,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-01-28 15:46:58,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:58,634 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:58,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:58,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2135054585, now seen corresponding path program 34 times [2022-01-28 15:46:58,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:58,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138431841] [2022-01-28 15:46:58,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:58,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:58,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:58,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138431841] [2022-01-28 15:46:58,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138431841] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:58,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388667543] [2022-01-28 15:46:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:46:58,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:58,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:58,760 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) [2022-01-28 15:46:58,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-01-28 15:46:58,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:46:58,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:58,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-28 15:46:58,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:58,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:46:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:58,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:59,144 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:59,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:46:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:59,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:59,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:59,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-01-28 15:46:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:59,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388667543] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:59,220 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:59,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-01-28 15:46:59,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572642179] [2022-01-28 15:46:59,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:59,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:46:59,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:59,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:46:59,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:46:59,221 INFO L87 Difference]: Start difference. First operand 8560 states and 29955 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:59,585 INFO L93 Difference]: Finished difference Result 9355 states and 32273 transitions. [2022-01-28 15:46:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:46:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:46:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:59,606 INFO L225 Difference]: With dead ends: 9355 [2022-01-28 15:46:59,606 INFO L226 Difference]: Without dead ends: 9324 [2022-01-28 15:46:59,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:46:59,607 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 184 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:59,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 367 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:46:59,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9324 states. [2022-01-28 15:46:59,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9324 to 8601. [2022-01-28 15:46:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8601 states, 8600 states have (on average 3.4967441860465116) internal successors, (30072), 8600 states have internal predecessors, (30072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:59,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8601 states to 8601 states and 30072 transitions. [2022-01-28 15:46:59,757 INFO L78 Accepts]: Start accepts. Automaton has 8601 states and 30072 transitions. Word has length 30 [2022-01-28 15:46:59,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:59,757 INFO L470 AbstractCegarLoop]: Abstraction has 8601 states and 30072 transitions. [2022-01-28 15:46:59,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8601 states and 30072 transitions. [2022-01-28 15:46:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:46:59,770 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:59,771 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:59,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-01-28 15:46:59,987 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,SelfDestructingSolverStorable112 [2022-01-28 15:46:59,987 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:46:59,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:59,987 INFO L85 PathProgramCache]: Analyzing trace with hash -308519106, now seen corresponding path program 44 times [2022-01-28 15:46:59,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:59,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832689994] [2022-01-28 15:46:59,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:59,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:00,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832689994] [2022-01-28 15:47:00,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832689994] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:00,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390337749] [2022-01-28 15:47:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:47:00,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:00,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:00,257 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) [2022-01-28 15:47:00,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-01-28 15:47:00,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:47:00,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:47:00,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:47:00,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:00,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:00,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:00,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:47:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:00,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:01,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:01,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:01,177 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:01,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 53 [2022-01-28 15:47:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:01,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390337749] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:01,502 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:01,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 35 [2022-01-28 15:47:01,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939922334] [2022-01-28 15:47:01,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:01,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:47:01,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:01,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:47:01,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:47:01,503 INFO L87 Difference]: Start difference. First operand 8601 states and 30072 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:47:12,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:47:12,205 INFO L93 Difference]: Finished difference Result 16036 states and 53220 transitions. [2022-01-28 15:47:12,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-01-28 15:47:12,206 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 30 [2022-01-28 15:47:12,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:47:12,242 INFO L225 Difference]: With dead ends: 16036 [2022-01-28 15:47:12,243 INFO L226 Difference]: Without dead ends: 15985 [2022-01-28 15:47:12,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15288 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=3631, Invalid=36169, Unknown=0, NotChecked=0, Total=39800 [2022-01-28 15:47:12,246 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 635 mSDsluCounter, 2430 mSDsCounter, 0 mSdLazyCounter, 4702 mSolverCounterSat, 261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1397 SdHoareTripleChecker+Invalid, 6859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 261 IncrementalHoareTripleChecker+Valid, 4702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1896 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:47:12,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1397 Invalid, 6859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [261 Valid, 4702 Invalid, 0 Unknown, 1896 Unchecked, 2.2s Time] [2022-01-28 15:47:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15985 states. [2022-01-28 15:47:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15985 to 8631. [2022-01-28 15:47:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 3.496987253765933) internal successors, (30179), 8630 states have internal predecessors, (30179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:12,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 30179 transitions. [2022-01-28 15:47:12,492 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 30179 transitions. Word has length 30 [2022-01-28 15:47:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:47:12,492 INFO L470 AbstractCegarLoop]: Abstraction has 8631 states and 30179 transitions. [2022-01-28 15:47:12,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:47:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 30179 transitions. [2022-01-28 15:47:12,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:47:12,505 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:47:12,505 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:47:12,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-01-28 15:47:12,706 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,SelfDestructingSolverStorable113 [2022-01-28 15:47:12,706 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:47:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:47:12,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1282862210, now seen corresponding path program 45 times [2022-01-28 15:47:12,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:47:12,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869626141] [2022-01-28 15:47:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:47:12,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:47:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:12,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:12,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869626141] [2022-01-28 15:47:12,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869626141] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:12,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178182626] [2022-01-28 15:47:12,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:47:12,974 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:12,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:12,975 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) [2022-01-28 15:47:12,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-01-28 15:47:13,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:47:13,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:47:13,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-28 15:47:13,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:13,198 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:13,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 35 [2022-01-28 15:47:14,184 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:14,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:14,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:14,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:14,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 36 treesize of output 41 [2022-01-28 15:47:14,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:14,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178182626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:14,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:14,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 34 [2022-01-28 15:47:14,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917832436] [2022-01-28 15:47:14,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:14,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-28 15:47:14,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-28 15:47:14,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=964, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:47:14,712 INFO L87 Difference]: Start difference. First operand 8631 states and 30179 transitions. Second operand has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) [2022-01-28 15:47:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:47:26,793 INFO L93 Difference]: Finished difference Result 15973 states and 53801 transitions. [2022-01-28 15:47:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-28 15:47:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) Word has length 30 [2022-01-28 15:47:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:47:26,830 INFO L225 Difference]: With dead ends: 15973 [2022-01-28 15:47:26,830 INFO L226 Difference]: Without dead ends: 15861 [2022-01-28 15:47:26,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 12103 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=4130, Invalid=26670, Unknown=0, NotChecked=0, Total=30800 [2022-01-28 15:47:26,831 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 795 mSDsluCounter, 1667 mSDsCounter, 0 mSdLazyCounter, 2797 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 4281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 2797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1083 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:47:26,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 1352 Invalid, 4281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 2797 Invalid, 0 Unknown, 1083 Unchecked, 1.5s Time] [2022-01-28 15:47:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15861 states. [2022-01-28 15:47:27,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15861 to 8687. [2022-01-28 15:47:27,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8687 states, 8686 states have (on average 3.4963159106608335) internal successors, (30369), 8686 states have internal predecessors, (30369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8687 states to 8687 states and 30369 transitions. [2022-01-28 15:47:27,061 INFO L78 Accepts]: Start accepts. Automaton has 8687 states and 30369 transitions. Word has length 30 [2022-01-28 15:47:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:47:27,061 INFO L470 AbstractCegarLoop]: Abstraction has 8687 states and 30369 transitions. [2022-01-28 15:47:27,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.264705882352941) internal successors, (77), 34 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) [2022-01-28 15:47:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 8687 states and 30369 transitions. [2022-01-28 15:47:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:47:27,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:47:27,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:47:27,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-01-28 15:47:27,275 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,SelfDestructingSolverStorable114 [2022-01-28 15:47:27,276 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:47:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:47:27,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1779086138, now seen corresponding path program 46 times [2022-01-28 15:47:27,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:47:27,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557855903] [2022-01-28 15:47:27,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:47:27,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:47:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:27,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557855903] [2022-01-28 15:47:27,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557855903] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:27,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56429132] [2022-01-28 15:47:27,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:47:27,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:27,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:27,538 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) [2022-01-28 15:47:27,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-01-28 15:47:27,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:47:27,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:47:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:47:27,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:27,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:27,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:27,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:47:27,856 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:27,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:28,127 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:47:28,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:47:28,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:28,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:28,281 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:28,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:47:28,447 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:28,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56429132] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:28,447 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:28,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 15:47:28,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348938943] [2022-01-28 15:47:28,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:28,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:47:28,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:28,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:47:28,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:47:28,448 INFO L87 Difference]: Start difference. First operand 8687 states and 30369 transitions. Second operand has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:37,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:47:37,534 INFO L93 Difference]: Finished difference Result 15954 states and 52648 transitions. [2022-01-28 15:47:37,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-28 15:47:37,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:47:37,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:47:37,571 INFO L225 Difference]: With dead ends: 15954 [2022-01-28 15:47:37,571 INFO L226 Difference]: Without dead ends: 15900 [2022-01-28 15:47:37,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11068 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2730, Invalid=26000, Unknown=0, NotChecked=0, Total=28730 [2022-01-28 15:47:37,574 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 580 mSDsluCounter, 1876 mSDsCounter, 0 mSdLazyCounter, 5255 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1074 SdHoareTripleChecker+Invalid, 5545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 5255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:47:37,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 1074 Invalid, 5545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 5255 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-28 15:47:37,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15900 states. [2022-01-28 15:47:37,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15900 to 8778. [2022-01-28 15:47:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8778 states, 8777 states have (on average 3.49618320610687) internal successors, (30686), 8777 states have internal predecessors, (30686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:37,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8778 states to 8778 states and 30686 transitions. [2022-01-28 15:47:37,842 INFO L78 Accepts]: Start accepts. Automaton has 8778 states and 30686 transitions. Word has length 30 [2022-01-28 15:47:37,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:47:37,842 INFO L470 AbstractCegarLoop]: Abstraction has 8778 states and 30686 transitions. [2022-01-28 15:47:37,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:37,842 INFO L276 IsEmpty]: Start isEmpty. Operand 8778 states and 30686 transitions. [2022-01-28 15:47:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:47:37,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:47:37,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:47:37,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-01-28 15:47:38,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:38,057 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:47:38,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:47:38,057 INFO L85 PathProgramCache]: Analyzing trace with hash 413312366, now seen corresponding path program 47 times [2022-01-28 15:47:38,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:47:38,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671223500] [2022-01-28 15:47:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:47:38,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:47:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:38,348 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:38,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671223500] [2022-01-28 15:47:38,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671223500] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615170189] [2022-01-28 15:47:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:47:38,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:38,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:38,349 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) [2022-01-28 15:47:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-01-28 15:47:38,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:47:38,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:47:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:47:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:38,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:38,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:38,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:47:38,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:38,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:38,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:38,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:47:39,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:39,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:39,136 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:39,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:47:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:39,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615170189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:39,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:39,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-01-28 15:47:39,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468405859] [2022-01-28 15:47:39,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:39,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:47:39,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:39,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:47:39,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:47:39,289 INFO L87 Difference]: Start difference. First operand 8778 states and 30686 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) [2022-01-28 15:47:43,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:47:43,928 INFO L93 Difference]: Finished difference Result 13913 states and 46136 transitions. [2022-01-28 15:47:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-28 15:47:43,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) Word has length 30 [2022-01-28 15:47:43,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:47:43,960 INFO L225 Difference]: With dead ends: 13913 [2022-01-28 15:47:43,960 INFO L226 Difference]: Without dead ends: 13862 [2022-01-28 15:47:43,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3534 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1159, Invalid=9347, Unknown=0, NotChecked=0, Total=10506 [2022-01-28 15:47:43,961 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 311 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 3036 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 3182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 3036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:47:43,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 548 Invalid, 3182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 3036 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:47:43,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13862 states. [2022-01-28 15:47:44,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13862 to 8801. [2022-01-28 15:47:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8801 states, 8800 states have (on average 3.4967045454545453) internal successors, (30771), 8800 states have internal predecessors, (30771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:44,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8801 states to 8801 states and 30771 transitions. [2022-01-28 15:47:44,177 INFO L78 Accepts]: Start accepts. Automaton has 8801 states and 30771 transitions. Word has length 30 [2022-01-28 15:47:44,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:47:44,177 INFO L470 AbstractCegarLoop]: Abstraction has 8801 states and 30771 transitions. [2022-01-28 15:47:44,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 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) [2022-01-28 15:47:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 8801 states and 30771 transitions. [2022-01-28 15:47:44,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:47:44,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:47:44,190 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:47:44,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-01-28 15:47:44,392 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,SelfDestructingSolverStorable116 [2022-01-28 15:47:44,392 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:47:44,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:47:44,392 INFO L85 PathProgramCache]: Analyzing trace with hash 611655742, now seen corresponding path program 48 times [2022-01-28 15:47:44,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:47:44,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803247539] [2022-01-28 15:47:44,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:47:44,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:47:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:44,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803247539] [2022-01-28 15:47:44,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803247539] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257227569] [2022-01-28 15:47:44,688 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:47:44,688 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:44,690 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) [2022-01-28 15:47:44,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-01-28 15:47:44,711 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:47:44,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:47:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:47:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:44,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:44,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:44,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:47:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:45,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:45,340 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:47:45,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:47:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:45,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:45,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:45,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:47:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:45,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257227569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:45,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:45,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 15:47:45,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873556769] [2022-01-28 15:47:45,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:45,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:47:45,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:45,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:47:45,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=816, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:47:45,665 INFO L87 Difference]: Start difference. First operand 8801 states and 30771 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-01-28 15:47:53,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:47:53,865 INFO L93 Difference]: Finished difference Result 18720 states and 61443 transitions. [2022-01-28 15:47:53,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-28 15:47:53,865 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) Word has length 30 [2022-01-28 15:47:53,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:47:53,907 INFO L225 Difference]: With dead ends: 18720 [2022-01-28 15:47:53,907 INFO L226 Difference]: Without dead ends: 18598 [2022-01-28 15:47:53,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10450 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2831, Invalid=24559, Unknown=0, NotChecked=0, Total=27390 [2022-01-28 15:47:53,909 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 634 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 4399 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 4399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:47:53,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 932 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 4399 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-28 15:47:53,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18598 states. [2022-01-28 15:47:54,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18598 to 8903. [2022-01-28 15:47:54,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8903 states, 8902 states have (on average 3.501460345989665) internal successors, (31170), 8902 states have internal predecessors, (31170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:47:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8903 states to 8903 states and 31170 transitions. [2022-01-28 15:47:54,189 INFO L78 Accepts]: Start accepts. Automaton has 8903 states and 31170 transitions. Word has length 30 [2022-01-28 15:47:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:47:54,189 INFO L470 AbstractCegarLoop]: Abstraction has 8903 states and 31170 transitions. [2022-01-28 15:47:54,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 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) [2022-01-28 15:47:54,190 INFO L276 IsEmpty]: Start isEmpty. Operand 8903 states and 31170 transitions. [2022-01-28 15:47:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:47:54,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:47:54,203 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:47:54,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-01-28 15:47:54,403 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,SelfDestructingSolverStorable117 [2022-01-28 15:47:54,403 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:47:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:47:54,404 INFO L85 PathProgramCache]: Analyzing trace with hash -398070230, now seen corresponding path program 49 times [2022-01-28 15:47:54,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:47:54,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302028126] [2022-01-28 15:47:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:47:54,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:47:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:54,721 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:47:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302028126] [2022-01-28 15:47:54,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302028126] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:47:54,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012745824] [2022-01-28 15:47:54,721 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:47:54,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:47:54,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:47:54,722 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) [2022-01-28 15:47:54,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-01-28 15:47:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:47:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:47:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:47:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:54,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:54,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:47:54,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:54,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-01-28 15:47:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:55,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:47:55,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:55,332 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:55,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:47:55,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:55,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:47:55,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:47:55,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:47:55,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:47:55,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012745824] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:47:55,631 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:47:55,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:47:55,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714417662] [2022-01-28 15:47:55,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:47:55,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:47:55,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:47:55,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:47:55,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:47:55,632 INFO L87 Difference]: Start difference. First operand 8903 states and 31170 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:00,533 INFO L93 Difference]: Finished difference Result 14034 states and 46257 transitions. [2022-01-28 15:48:00,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-28 15:48:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:48:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:00,564 INFO L225 Difference]: With dead ends: 14034 [2022-01-28 15:48:00,564 INFO L226 Difference]: Without dead ends: 13956 [2022-01-28 15:48:00,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3692 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1353, Invalid=9777, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 15:48:00,565 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 395 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3123 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 3123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:00,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 636 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 3123 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-28 15:48:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13956 states. [2022-01-28 15:48:00,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13956 to 8901. [2022-01-28 15:48:00,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8901 states, 8900 states have (on average 3.501573033707865) internal successors, (31164), 8900 states have internal predecessors, (31164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 31164 transitions. [2022-01-28 15:48:00,801 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 31164 transitions. Word has length 30 [2022-01-28 15:48:00,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:00,801 INFO L470 AbstractCegarLoop]: Abstraction has 8901 states and 31164 transitions. [2022-01-28 15:48:00,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 31164 transitions. [2022-01-28 15:48:00,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:00,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:00,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:00,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-01-28 15:48:01,015 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,SelfDestructingSolverStorable118 [2022-01-28 15:48:01,016 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:01,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:01,016 INFO L85 PathProgramCache]: Analyzing trace with hash 845573306, now seen corresponding path program 50 times [2022-01-28 15:48:01,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:01,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460789934] [2022-01-28 15:48:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:01,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:01,290 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:01,291 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460789934] [2022-01-28 15:48:01,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460789934] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:01,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756601934] [2022-01-28 15:48:01,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:48:01,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:01,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:01,292 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) [2022-01-28 15:48:01,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-01-28 15:48:01,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:48:01,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:48:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:48:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:01,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:01,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:48:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:01,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:01,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:01,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:48:01,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:01,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:02,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:02,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:48:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:02,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756601934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:48:02,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:48:02,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:48:02,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982893242] [2022-01-28 15:48:02,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:48:02,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:48:02,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:48:02,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:48:02,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:48:02,149 INFO L87 Difference]: Start difference. First operand 8901 states and 31164 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2022-01-28 15:48:06,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:06,710 INFO L93 Difference]: Finished difference Result 14281 states and 47073 transitions. [2022-01-28 15:48:06,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-28 15:48:06,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) Word has length 30 [2022-01-28 15:48:06,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:06,740 INFO L225 Difference]: With dead ends: 14281 [2022-01-28 15:48:06,741 INFO L226 Difference]: Without dead ends: 14218 [2022-01-28 15:48:06,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3877 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1263, Invalid=9867, Unknown=0, NotChecked=0, Total=11130 [2022-01-28 15:48:06,742 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 372 mSDsluCounter, 1341 mSDsCounter, 0 mSdLazyCounter, 3495 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 3636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:06,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 867 Invalid, 3636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3495 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:48:06,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2022-01-28 15:48:06,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 8891. [2022-01-28 15:48:06,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8891 states, 8890 states have (on average 3.501349831271091) internal successors, (31127), 8890 states have internal predecessors, (31127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:06,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 31127 transitions. [2022-01-28 15:48:06,944 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 31127 transitions. Word has length 30 [2022-01-28 15:48:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:06,944 INFO L470 AbstractCegarLoop]: Abstraction has 8891 states and 31127 transitions. [2022-01-28 15:48:06,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2022-01-28 15:48:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 31127 transitions. [2022-01-28 15:48:06,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:06,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:06,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:06,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-01-28 15:48:07,157 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,SelfDestructingSolverStorable119 [2022-01-28 15:48:07,157 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:07,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:07,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1926352970, now seen corresponding path program 51 times [2022-01-28 15:48:07,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238271479] [2022-01-28 15:48:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:07,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:07,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:07,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238271479] [2022-01-28 15:48:07,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238271479] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:07,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876411380] [2022-01-28 15:48:07,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:48:07,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:07,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:07,455 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) [2022-01-28 15:48:07,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-01-28 15:48:07,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:48:07,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:48:07,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:48:07,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:07,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:07,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:48:07,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:07,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:08,420 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:08,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 25 [2022-01-28 15:48:08,463 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:08,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876411380] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:48:08,463 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:48:08,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 35 [2022-01-28 15:48:08,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553558630] [2022-01-28 15:48:08,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:48:08,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:48:08,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:48:08,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:48:08,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:48:08,464 INFO L87 Difference]: Start difference. First operand 8891 states and 31127 transitions. Second operand has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:48:12,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:12,846 INFO L93 Difference]: Finished difference Result 15954 states and 54129 transitions. [2022-01-28 15:48:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-28 15:48:12,847 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) Word has length 30 [2022-01-28 15:48:12,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:12,881 INFO L225 Difference]: With dead ends: 15954 [2022-01-28 15:48:12,881 INFO L226 Difference]: Without dead ends: 15884 [2022-01-28 15:48:12,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4531 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1883, Invalid=11923, Unknown=0, NotChecked=0, Total=13806 [2022-01-28 15:48:12,882 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 506 mSDsluCounter, 1220 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 3599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 783 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:12,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 916 Invalid, 3599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2592 Invalid, 0 Unknown, 783 Unchecked, 1.2s Time] [2022-01-28 15:48:12,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15884 states. [2022-01-28 15:48:13,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15884 to 8896. [2022-01-28 15:48:13,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8896 states, 8895 states have (on average 3.501292861157954) internal successors, (31144), 8895 states have internal predecessors, (31144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:13,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8896 states to 8896 states and 31144 transitions. [2022-01-28 15:48:13,095 INFO L78 Accepts]: Start accepts. Automaton has 8896 states and 31144 transitions. Word has length 30 [2022-01-28 15:48:13,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:13,095 INFO L470 AbstractCegarLoop]: Abstraction has 8896 states and 31144 transitions. [2022-01-28 15:48:13,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2) internal successors, (77), 35 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) [2022-01-28 15:48:13,096 INFO L276 IsEmpty]: Start isEmpty. Operand 8896 states and 31144 transitions. [2022-01-28 15:48:13,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:13,109 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:13,109 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:13,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-01-28 15:48:13,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:13,309 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:13,310 INFO L85 PathProgramCache]: Analyzing trace with hash 421281022, now seen corresponding path program 52 times [2022-01-28 15:48:13,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:13,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687903406] [2022-01-28 15:48:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:13,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:13,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:13,565 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:13,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687903406] [2022-01-28 15:48:13,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687903406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:13,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951604780] [2022-01-28 15:48:13,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:48:13,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:13,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:13,566 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) [2022-01-28 15:48:13,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-01-28 15:48:13,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:48:13,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:48:13,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:48:13,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:13,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:13,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:13,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:48:13,924 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:13,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:14,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:14,186 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:14,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:48:14,312 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:14,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:14,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:14,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:48:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:14,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951604780] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:48:14,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:48:14,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-28 15:48:14,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661491628] [2022-01-28 15:48:14,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:48:14,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:48:14,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:48:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:48:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:48:14,497 INFO L87 Difference]: Start difference. First operand 8896 states and 31144 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:16,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:16,843 INFO L93 Difference]: Finished difference Result 13180 states and 43842 transitions. [2022-01-28 15:48:16,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:48:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:48:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:16,870 INFO L225 Difference]: With dead ends: 13180 [2022-01-28 15:48:16,870 INFO L226 Difference]: Without dead ends: 13150 [2022-01-28 15:48:16,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=800, Invalid=4456, Unknown=0, NotChecked=0, Total=5256 [2022-01-28 15:48:16,871 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 348 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 544 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:16,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 465 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1779 Invalid, 0 Unknown, 544 Unchecked, 0.8s Time] [2022-01-28 15:48:16,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13150 states. [2022-01-28 15:48:17,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13150 to 8933. [2022-01-28 15:48:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8933 states, 8932 states have (on average 3.501231527093596) internal successors, (31273), 8932 states have internal predecessors, (31273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8933 states to 8933 states and 31273 transitions. [2022-01-28 15:48:17,064 INFO L78 Accepts]: Start accepts. Automaton has 8933 states and 31273 transitions. Word has length 30 [2022-01-28 15:48:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:17,064 INFO L470 AbstractCegarLoop]: Abstraction has 8933 states and 31273 transitions. [2022-01-28 15:48:17,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:17,064 INFO L276 IsEmpty]: Start isEmpty. Operand 8933 states and 31273 transitions. [2022-01-28 15:48:17,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:17,076 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:17,076 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:17,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-01-28 15:48:17,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:17,277 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1129878398, now seen corresponding path program 53 times [2022-01-28 15:48:17,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:17,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741350645] [2022-01-28 15:48:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:17,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:17,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:17,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:17,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741350645] [2022-01-28 15:48:17,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741350645] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931170225] [2022-01-28 15:48:17,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:48:17,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:17,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:17,596 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) [2022-01-28 15:48:17,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-01-28 15:48:17,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:48:17,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:48:17,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:48:17,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:17,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:17,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:17,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:48:18,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:18,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:18,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:18,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:18,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:48:18,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:18,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:18,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:18,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:48:18,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:18,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931170225] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:48:18,549 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:48:18,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:48:18,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240010597] [2022-01-28 15:48:18,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:48:18,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:48:18,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:48:18,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:48:18,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:48:18,550 INFO L87 Difference]: Start difference. First operand 8933 states and 31273 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:20,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:20,812 INFO L93 Difference]: Finished difference Result 13198 states and 43903 transitions. [2022-01-28 15:48:20,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:48:20,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:48:20,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:20,846 INFO L225 Difference]: With dead ends: 13198 [2022-01-28 15:48:20,846 INFO L226 Difference]: Without dead ends: 13183 [2022-01-28 15:48:20,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=761, Invalid=4209, Unknown=0, NotChecked=0, Total=4970 [2022-01-28 15:48:20,847 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 321 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1527 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:20,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 389 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1527 Invalid, 0 Unknown, 596 Unchecked, 0.7s Time] [2022-01-28 15:48:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13183 states. [2022-01-28 15:48:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13183 to 8917. [2022-01-28 15:48:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 3.5010094212651413) internal successors, (31215), 8916 states have internal predecessors, (31215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 31215 transitions. [2022-01-28 15:48:21,119 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 31215 transitions. Word has length 30 [2022-01-28 15:48:21,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:21,119 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 31215 transitions. [2022-01-28 15:48:21,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 31215 transitions. [2022-01-28 15:48:21,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:21,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:21,132 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:21,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-01-28 15:48:21,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-01-28 15:48:21,333 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:21,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:21,334 INFO L85 PathProgramCache]: Analyzing trace with hash -2068138138, now seen corresponding path program 54 times [2022-01-28 15:48:21,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:21,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169147984] [2022-01-28 15:48:21,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:21,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:21,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169147984] [2022-01-28 15:48:21,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169147984] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:21,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357168949] [2022-01-28 15:48:21,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:48:21,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:21,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:21,594 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) [2022-01-28 15:48:21,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-01-28 15:48:21,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:48:21,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:48:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:48:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:21,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:48:22,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:22,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:22,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:22,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:22,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:22,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:48:23,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:23,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-28 15:48:23,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:23,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357168949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:48:23,130 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:48:23,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 36 [2022-01-28 15:48:23,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262738180] [2022-01-28 15:48:23,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:48:23,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-28 15:48:23,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:48:23,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-28 15:48:23,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1081, Unknown=1, NotChecked=0, Total=1260 [2022-01-28 15:48:23,131 INFO L87 Difference]: Start difference. First operand 8917 states and 31215 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-01-28 15:48:58,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:48:58,171 INFO L93 Difference]: Finished difference Result 22454 states and 74197 transitions. [2022-01-28 15:48:58,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 331 states. [2022-01-28 15:48:58,171 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) Word has length 30 [2022-01-28 15:48:58,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:48:58,222 INFO L225 Difference]: With dead ends: 22454 [2022-01-28 15:48:58,223 INFO L226 Difference]: Without dead ends: 22335 [2022-01-28 15:48:58,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 344 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 52415 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=11621, Invalid=107738, Unknown=11, NotChecked=0, Total=119370 [2022-01-28 15:48:58,227 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1159 mSDsluCounter, 2721 mSDsCounter, 0 mSdLazyCounter, 7069 mSolverCounterSat, 543 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 1537 SdHoareTripleChecker+Invalid, 8846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 543 IncrementalHoareTripleChecker+Valid, 7069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1234 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:48:58,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 1537 Invalid, 8846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [543 Valid, 7069 Invalid, 0 Unknown, 1234 Unchecked, 3.6s Time] [2022-01-28 15:48:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22335 states. [2022-01-28 15:48:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22335 to 9055. [2022-01-28 15:48:58,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9055 states, 9054 states have (on average 3.5114866357411088) internal successors, (31793), 9054 states have internal predecessors, (31793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:48:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9055 states to 9055 states and 31793 transitions. [2022-01-28 15:48:58,589 INFO L78 Accepts]: Start accepts. Automaton has 9055 states and 31793 transitions. Word has length 30 [2022-01-28 15:48:58,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:48:58,589 INFO L470 AbstractCegarLoop]: Abstraction has 9055 states and 31793 transitions. [2022-01-28 15:48:58,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 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) [2022-01-28 15:48:58,589 INFO L276 IsEmpty]: Start isEmpty. Operand 9055 states and 31793 transitions. [2022-01-28 15:48:58,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:48:58,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:48:58,602 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:48:58,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-01-28 15:48:58,802 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,SelfDestructingSolverStorable123 [2022-01-28 15:48:58,802 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:48:58,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:48:58,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1590362304, now seen corresponding path program 55 times [2022-01-28 15:48:58,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:48:58,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193968122] [2022-01-28 15:48:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:48:58,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:48:58,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:59,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:48:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193968122] [2022-01-28 15:48:59,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193968122] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:48:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161570750] [2022-01-28 15:48:59,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:48:59,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:48:59,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:48:59,073 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) [2022-01-28 15:48:59,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-01-28 15:48:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:48:59,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:48:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:48:59,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:59,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:48:59,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:59,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:59,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-01-28 15:48:59,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:48:59,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:48:59,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:59,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:59,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:48:59,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:59,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:48:59,839 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:48:59,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:49:00,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:00,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161570750] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:00,014 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:00,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:49:00,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145984785] [2022-01-28 15:49:00,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:00,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:49:00,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:00,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:49:00,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:49:00,016 INFO L87 Difference]: Start difference. First operand 9055 states and 31793 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:03,358 INFO L93 Difference]: Finished difference Result 14347 states and 47449 transitions. [2022-01-28 15:49:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-28 15:49:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:49:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:03,387 INFO L225 Difference]: With dead ends: 14347 [2022-01-28 15:49:03,387 INFO L226 Difference]: Without dead ends: 14191 [2022-01-28 15:49:03,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2457 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=984, Invalid=6498, Unknown=0, NotChecked=0, Total=7482 [2022-01-28 15:49:03,388 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 424 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 2056 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 2420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 2056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:03,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [424 Valid, 434 Invalid, 2420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 2056 Invalid, 0 Unknown, 230 Unchecked, 1.0s Time] [2022-01-28 15:49:03,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14191 states. [2022-01-28 15:49:03,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14191 to 9052. [2022-01-28 15:49:03,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9052 states, 9051 states have (on average 3.511656170588885) internal successors, (31784), 9051 states have internal predecessors, (31784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9052 states to 9052 states and 31784 transitions. [2022-01-28 15:49:03,583 INFO L78 Accepts]: Start accepts. Automaton has 9052 states and 31784 transitions. Word has length 30 [2022-01-28 15:49:03,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:03,583 INFO L470 AbstractCegarLoop]: Abstraction has 9052 states and 31784 transitions. [2022-01-28 15:49:03,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:03,583 INFO L276 IsEmpty]: Start isEmpty. Operand 9052 states and 31784 transitions. [2022-01-28 15:49:03,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:03,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:03,597 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:03,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2022-01-28 15:49:03,797 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,SelfDestructingSolverStorable124 [2022-01-28 15:49:03,797 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:03,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:03,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1228987414, now seen corresponding path program 56 times [2022-01-28 15:49:03,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:03,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433631904] [2022-01-28 15:49:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:03,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:04,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433631904] [2022-01-28 15:49:04,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433631904] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:04,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014922632] [2022-01-28 15:49:04,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:49:04,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:04,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:04,066 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) [2022-01-28 15:49:04,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-01-28 15:49:04,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:49:04,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:49:04,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:04,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:04,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:49:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:04,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:04,711 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:49:04,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 55 [2022-01-28 15:49:04,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:04,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:04,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:04,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:49:05,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:05,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014922632] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:05,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:05,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 12] total 32 [2022-01-28 15:49:05,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668788493] [2022-01-28 15:49:05,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:05,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:49:05,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:05,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:49:05,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:49:05,033 INFO L87 Difference]: Start difference. First operand 9052 states and 31784 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:49:09,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:09,301 INFO L93 Difference]: Finished difference Result 15303 states and 51208 transitions. [2022-01-28 15:49:09,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-28 15:49:09,301 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) Word has length 30 [2022-01-28 15:49:09,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:09,335 INFO L225 Difference]: With dead ends: 15303 [2022-01-28 15:49:09,335 INFO L226 Difference]: Without dead ends: 15238 [2022-01-28 15:49:09,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2727 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1030, Invalid=7900, Unknown=0, NotChecked=0, Total=8930 [2022-01-28 15:49:09,336 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 473 mSDsluCounter, 1312 mSDsCounter, 0 mSdLazyCounter, 3908 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 4108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:09,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 786 Invalid, 4108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3908 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:49:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15238 states. [2022-01-28 15:49:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15238 to 9066. [2022-01-28 15:49:09,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9066 states, 9065 states have (on average 3.5107556536127964) internal successors, (31825), 9065 states have internal predecessors, (31825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9066 states to 9066 states and 31825 transitions. [2022-01-28 15:49:09,566 INFO L78 Accepts]: Start accepts. Automaton has 9066 states and 31825 transitions. Word has length 30 [2022-01-28 15:49:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:09,566 INFO L470 AbstractCegarLoop]: Abstraction has 9066 states and 31825 transitions. [2022-01-28 15:49:09,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:49:09,567 INFO L276 IsEmpty]: Start isEmpty. Operand 9066 states and 31825 transitions. [2022-01-28 15:49:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:09,579 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:09,579 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:09,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-01-28 15:49:09,780 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,SelfDestructingSolverStorable125 [2022-01-28 15:49:09,780 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:09,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:09,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1172282182, now seen corresponding path program 57 times [2022-01-28 15:49:09,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:09,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102996266] [2022-01-28 15:49:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:09,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:09,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:10,076 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:10,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:10,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102996266] [2022-01-28 15:49:10,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102996266] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:10,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566333147] [2022-01-28 15:49:10,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:49:10,076 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:10,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:10,077 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) [2022-01-28 15:49:10,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-01-28 15:49:10,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:49:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:49:10,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:10,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:10,360 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:10,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:49:10,438 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:10,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:10,731 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:49:10,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 55 [2022-01-28 15:49:10,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:10,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:10,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:10,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:49:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:11,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566333147] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:11,046 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:11,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 32 [2022-01-28 15:49:11,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826976673] [2022-01-28 15:49:11,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:11,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:49:11,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:49:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:49:11,046 INFO L87 Difference]: Start difference. First operand 9066 states and 31825 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:49:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:16,561 INFO L93 Difference]: Finished difference Result 15688 states and 52374 transitions. [2022-01-28 15:49:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-28 15:49:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) Word has length 30 [2022-01-28 15:49:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:16,591 INFO L225 Difference]: With dead ends: 15688 [2022-01-28 15:49:16,591 INFO L226 Difference]: Without dead ends: 15619 [2022-01-28 15:49:16,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5026 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1489, Invalid=13517, Unknown=0, NotChecked=0, Total=15006 [2022-01-28 15:49:16,592 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 663 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 3089 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 3340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 3089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:16,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [663 Valid, 663 Invalid, 3340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 3089 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:49:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15619 states. [2022-01-28 15:49:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15619 to 9058. [2022-01-28 15:49:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9058 states, 9057 states have (on average 3.5112068013691067) internal successors, (31801), 9057 states have internal predecessors, (31801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:16,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9058 states to 9058 states and 31801 transitions. [2022-01-28 15:49:16,806 INFO L78 Accepts]: Start accepts. Automaton has 9058 states and 31801 transitions. Word has length 30 [2022-01-28 15:49:16,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:16,806 INFO L470 AbstractCegarLoop]: Abstraction has 9058 states and 31801 transitions. [2022-01-28 15:49:16,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 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) [2022-01-28 15:49:16,806 INFO L276 IsEmpty]: Start isEmpty. Operand 9058 states and 31801 transitions. [2022-01-28 15:49:16,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:16,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:16,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:16,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-01-28 15:49:17,020 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,SelfDestructingSolverStorable126 [2022-01-28 15:49:17,021 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 405258526, now seen corresponding path program 58 times [2022-01-28 15:49:17,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205008829] [2022-01-28 15:49:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:17,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:17,307 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:17,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:17,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205008829] [2022-01-28 15:49:17,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205008829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:17,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271829684] [2022-01-28 15:49:17,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:49:17,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:17,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:17,309 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) [2022-01-28 15:49:17,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-01-28 15:49:17,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:49:17,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:17,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:49:17,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:17,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:17,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:49:17,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:17,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:17,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:17,928 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:17,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:49:18,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:18,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:18,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:18,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:49:18,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:18,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271829684] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:18,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:18,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-01-28 15:49:18,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6878994] [2022-01-28 15:49:18,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:18,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:49:18,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:18,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:49:18,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:49:18,255 INFO L87 Difference]: Start difference. First operand 9058 states and 31801 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2022-01-28 15:49:22,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:22,268 INFO L93 Difference]: Finished difference Result 14247 states and 47347 transitions. [2022-01-28 15:49:22,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-28 15:49:22,269 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) Word has length 30 [2022-01-28 15:49:22,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:22,300 INFO L225 Difference]: With dead ends: 14247 [2022-01-28 15:49:22,300 INFO L226 Difference]: Without dead ends: 14202 [2022-01-28 15:49:22,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1270, Invalid=8042, Unknown=0, NotChecked=0, Total=9312 [2022-01-28 15:49:22,301 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 421 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:22,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [421 Valid, 451 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 2157 Invalid, 0 Unknown, 244 Unchecked, 1.1s Time] [2022-01-28 15:49:22,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14202 states. [2022-01-28 15:49:22,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14202 to 9045. [2022-01-28 15:49:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9045 states, 9044 states have (on average 3.5110570544007076) internal successors, (31754), 9044 states have internal predecessors, (31754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9045 states to 9045 states and 31754 transitions. [2022-01-28 15:49:22,520 INFO L78 Accepts]: Start accepts. Automaton has 9045 states and 31754 transitions. Word has length 30 [2022-01-28 15:49:22,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:22,520 INFO L470 AbstractCegarLoop]: Abstraction has 9045 states and 31754 transitions. [2022-01-28 15:49:22,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 31 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) [2022-01-28 15:49:22,521 INFO L276 IsEmpty]: Start isEmpty. Operand 9045 states and 31754 transitions. [2022-01-28 15:49:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:22,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:22,534 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:22,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-01-28 15:49:22,743 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,SelfDestructingSolverStorable127 [2022-01-28 15:49:22,743 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash -402632157, now seen corresponding path program 25 times [2022-01-28 15:49:22,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:22,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404773225] [2022-01-28 15:49:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:22,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:23,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404773225] [2022-01-28 15:49:23,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404773225] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899934494] [2022-01-28 15:49:23,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:49:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:23,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:23,088 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) [2022-01-28 15:49:23,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-01-28 15:49:23,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:49:23,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:23,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:23,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:23,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:49:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:23,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:23,723 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:49:23,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:49:23,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:23,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:23,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:23,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:49:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899934494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:23,863 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:23,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2022-01-28 15:49:23,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203891832] [2022-01-28 15:49:23,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:23,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:49:23,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:23,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:49:23,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:49:23,865 INFO L87 Difference]: Start difference. First operand 9045 states and 31754 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:27,229 INFO L93 Difference]: Finished difference Result 14054 states and 47769 transitions. [2022-01-28 15:49:27,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-28 15:49:27,229 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:49:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:27,262 INFO L225 Difference]: With dead ends: 14054 [2022-01-28 15:49:27,262 INFO L226 Difference]: Without dead ends: 14007 [2022-01-28 15:49:27,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1945 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=908, Invalid=5898, Unknown=0, NotChecked=0, Total=6806 [2022-01-28 15:49:27,263 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 372 mSDsluCounter, 1073 mSDsCounter, 0 mSdLazyCounter, 2606 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:27,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 543 Invalid, 2810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2606 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-28 15:49:27,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2022-01-28 15:49:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 9039. [2022-01-28 15:49:27,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9039 states, 9038 states have (on average 3.511728258464262) internal successors, (31739), 9038 states have internal predecessors, (31739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9039 states to 9039 states and 31739 transitions. [2022-01-28 15:49:27,457 INFO L78 Accepts]: Start accepts. Automaton has 9039 states and 31739 transitions. Word has length 30 [2022-01-28 15:49:27,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:27,457 INFO L470 AbstractCegarLoop]: Abstraction has 9039 states and 31739 transitions. [2022-01-28 15:49:27,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 9039 states and 31739 transitions. [2022-01-28 15:49:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:27,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:27,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:27,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-01-28 15:49:27,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:27,671 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:27,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:27,672 INFO L85 PathProgramCache]: Analyzing trace with hash -121720823, now seen corresponding path program 26 times [2022-01-28 15:49:27,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:27,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713394857] [2022-01-28 15:49:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:27,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:27,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:28,038 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:28,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713394857] [2022-01-28 15:49:28,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713394857] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:28,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163460009] [2022-01-28 15:49:28,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:49:28,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:28,040 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) [2022-01-28 15:49:28,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-01-28 15:49:28,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:49:28,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:28,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:49:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:28,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:28,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:49:28,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:28,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:28,836 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:49:28,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:49:28,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:49:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:28,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163460009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:28,962 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:28,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 37 [2022-01-28 15:49:28,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819440341] [2022-01-28 15:49:28,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:28,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-28 15:49:28,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:28,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-28 15:49:28,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-01-28 15:49:28,963 INFO L87 Difference]: Start difference. First operand 9039 states and 31739 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:36,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:36,977 INFO L93 Difference]: Finished difference Result 16826 states and 56685 transitions. [2022-01-28 15:49:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-28 15:49:36,978 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:49:36,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:37,015 INFO L225 Difference]: With dead ends: 16826 [2022-01-28 15:49:37,015 INFO L226 Difference]: Without dead ends: 16721 [2022-01-28 15:49:37,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9204 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3111, Invalid=21695, Unknown=0, NotChecked=0, Total=24806 [2022-01-28 15:49:37,016 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 568 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 3526 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 3962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 3526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:37,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 734 Invalid, 3962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 3526 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-28 15:49:37,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16721 states. [2022-01-28 15:49:37,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16721 to 9101. [2022-01-28 15:49:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9101 states, 9100 states have (on average 3.505714285714286) internal successors, (31902), 9100 states have internal predecessors, (31902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9101 states to 9101 states and 31902 transitions. [2022-01-28 15:49:37,233 INFO L78 Accepts]: Start accepts. Automaton has 9101 states and 31902 transitions. Word has length 30 [2022-01-28 15:49:37,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:37,233 INFO L470 AbstractCegarLoop]: Abstraction has 9101 states and 31902 transitions. [2022-01-28 15:49:37,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:37,233 INFO L276 IsEmpty]: Start isEmpty. Operand 9101 states and 31902 transitions. [2022-01-28 15:49:37,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:37,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:37,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:37,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-01-28 15:49:37,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:37,447 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -83958241, now seen corresponding path program 27 times [2022-01-28 15:49:37,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435593783] [2022-01-28 15:49:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:37,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:37,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435593783] [2022-01-28 15:49:37,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435593783] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:37,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884080137] [2022-01-28 15:49:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:49:37,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:37,759 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) [2022-01-28 15:49:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-01-28 15:49:37,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:49:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 30 conjunts are in the unsatisfiable core [2022-01-28 15:49:37,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:38,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:38,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:38,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:38,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 19 treesize of output 27 [2022-01-28 15:49:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:38,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:39,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:39,090 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:39,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 25 [2022-01-28 15:49:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:39,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884080137] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:39,195 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:39,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 15] total 38 [2022-01-28 15:49:39,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761558882] [2022-01-28 15:49:39,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:39,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-28 15:49:39,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-28 15:49:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:49:39,196 INFO L87 Difference]: Start difference. First operand 9101 states and 31902 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) 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) [2022-01-28 15:49:42,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:42,457 INFO L93 Difference]: Finished difference Result 17096 states and 57679 transitions. [2022-01-28 15:49:42,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-28 15:49:42,457 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) 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) Word has length 30 [2022-01-28 15:49:42,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:42,496 INFO L225 Difference]: With dead ends: 17096 [2022-01-28 15:49:42,496 INFO L226 Difference]: Without dead ends: 17066 [2022-01-28 15:49:42,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 50 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1092, Invalid=7280, Unknown=0, NotChecked=0, Total=8372 [2022-01-28 15:49:42,497 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 370 mSDsluCounter, 1167 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 826 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:42,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 786 Invalid, 2521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 1576 Invalid, 0 Unknown, 826 Unchecked, 0.7s Time] [2022-01-28 15:49:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17066 states. [2022-01-28 15:49:42,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17066 to 9105. [2022-01-28 15:49:42,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9105 states, 9104 states have (on average 3.5054920913884007) internal successors, (31914), 9104 states have internal predecessors, (31914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:42,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9105 states to 9105 states and 31914 transitions. [2022-01-28 15:49:42,740 INFO L78 Accepts]: Start accepts. Automaton has 9105 states and 31914 transitions. Word has length 30 [2022-01-28 15:49:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:42,741 INFO L470 AbstractCegarLoop]: Abstraction has 9105 states and 31914 transitions. [2022-01-28 15:49:42,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) 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) [2022-01-28 15:49:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 9105 states and 31914 transitions. [2022-01-28 15:49:42,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:42,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:42,754 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:42,770 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-01-28 15:49:42,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:42,955 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:42,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2014571937, now seen corresponding path program 28 times [2022-01-28 15:49:42,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:42,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452282121] [2022-01-28 15:49:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:42,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:43,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452282121] [2022-01-28 15:49:43,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452282121] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:43,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781644886] [2022-01-28 15:49:43,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:49:43,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:43,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:43,266 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) [2022-01-28 15:49:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-01-28 15:49:43,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:49:43,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:49:43,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:43,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:43,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:43,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:43,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:49:43,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:43,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:43,863 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:49:43,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:49:43,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:43,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:43,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:43,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 3 [2022-01-28 15:49:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:43,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781644886] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:43,993 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:43,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 28 [2022-01-28 15:49:43,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045185796] [2022-01-28 15:49:43,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:43,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:49:43,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:49:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:49:43,993 INFO L87 Difference]: Start difference. First operand 9105 states and 31914 transitions. Second operand has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:47,054 INFO L93 Difference]: Finished difference Result 13635 states and 46405 transitions. [2022-01-28 15:49:47,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-28 15:49:47,054 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:49:47,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:47,085 INFO L225 Difference]: With dead ends: 13635 [2022-01-28 15:49:47,085 INFO L226 Difference]: Without dead ends: 13602 [2022-01-28 15:49:47,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2177 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=888, Invalid=6084, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:49:47,086 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 351 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 2333 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 2619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 2333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:47,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 525 Invalid, 2619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 2333 Invalid, 0 Unknown, 96 Unchecked, 1.0s Time] [2022-01-28 15:49:47,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13602 states. [2022-01-28 15:49:47,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13602 to 9113. [2022-01-28 15:49:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9113 states, 9112 states have (on average 3.5043898156277438) internal successors, (31932), 9112 states have internal predecessors, (31932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:47,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9113 states to 9113 states and 31932 transitions. [2022-01-28 15:49:47,279 INFO L78 Accepts]: Start accepts. Automaton has 9113 states and 31932 transitions. Word has length 30 [2022-01-28 15:49:47,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:47,279 INFO L470 AbstractCegarLoop]: Abstraction has 9113 states and 31932 transitions. [2022-01-28 15:49:47,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.310344827586207) internal successors, (67), 28 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:47,279 INFO L276 IsEmpty]: Start isEmpty. Operand 9113 states and 31932 transitions. [2022-01-28 15:49:47,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:47,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:47,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:47,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-01-28 15:49:47,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:47,499 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:47,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:47,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1490757745, now seen corresponding path program 29 times [2022-01-28 15:49:47,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:47,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300411224] [2022-01-28 15:49:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:47,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:47,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:47,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:47,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300411224] [2022-01-28 15:49:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300411224] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:47,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027565090] [2022-01-28 15:49:47,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:49:47,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:47,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:47,832 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) [2022-01-28 15:49:47,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-01-28 15:49:47,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:49:47,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:47,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:49:47,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:48,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:48,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:48,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:48,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:49:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:48,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:48,449 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:49:48,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:49:48,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:48,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:48,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:48,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:49:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:48,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027565090] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:48,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:48,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-01-28 15:49:48,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190175994] [2022-01-28 15:49:48,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:48,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:49:48,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:48,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:49:48,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:49:48,582 INFO L87 Difference]: Start difference. First operand 9113 states and 31932 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-01-28 15:49:51,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:49:51,599 INFO L93 Difference]: Finished difference Result 14054 states and 47792 transitions. [2022-01-28 15:49:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-28 15:49:51,599 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) Word has length 30 [2022-01-28 15:49:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:49:51,635 INFO L225 Difference]: With dead ends: 14054 [2022-01-28 15:49:51,635 INFO L226 Difference]: Without dead ends: 14007 [2022-01-28 15:49:51,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=938, Invalid=6034, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:49:51,636 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 940 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 2552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:49:51,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [361 Valid, 479 Invalid, 2552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-28 15:49:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2022-01-28 15:49:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 9113. [2022-01-28 15:49:51,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9113 states, 9112 states have (on average 3.5043898156277438) internal successors, (31932), 9112 states have internal predecessors, (31932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:49:51,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9113 states to 9113 states and 31932 transitions. [2022-01-28 15:49:51,861 INFO L78 Accepts]: Start accepts. Automaton has 9113 states and 31932 transitions. Word has length 30 [2022-01-28 15:49:51,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:49:51,861 INFO L470 AbstractCegarLoop]: Abstraction has 9113 states and 31932 transitions. [2022-01-28 15:49:51,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-01-28 15:49:51,862 INFO L276 IsEmpty]: Start isEmpty. Operand 9113 states and 31932 transitions. [2022-01-28 15:49:51,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:49:51,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:49:51,876 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:49:51,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-01-28 15:49:52,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-01-28 15:49:52,076 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:49:52,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:49:52,077 INFO L85 PathProgramCache]: Analyzing trace with hash 134738708, now seen corresponding path program 59 times [2022-01-28 15:49:52,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:49:52,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407532356] [2022-01-28 15:49:52,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:49:52,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:49:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:49:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:52,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:49:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407532356] [2022-01-28 15:49:52,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407532356] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:49:52,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58836659] [2022-01-28 15:49:52,377 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:49:52,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:49:52,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:49:52,378 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) [2022-01-28 15:49:52,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-01-28 15:49:52,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:49:52,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:49:52,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:49:52,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:49:52,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:49:52,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:52,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:49:52,741 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:52,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:49:53,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:53,036 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:53,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:49:53,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:49:53,202 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:49:53,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:49:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:49:53,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58836659] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:49:53,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:49:53,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 30 [2022-01-28 15:49:53,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247492809] [2022-01-28 15:49:53,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:49:53,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:49:53,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:49:53,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:49:53,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:49:53,363 INFO L87 Difference]: Start difference. First operand 9113 states and 31932 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-01-28 15:50:00,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:00,539 INFO L93 Difference]: Finished difference Result 14979 states and 49365 transitions. [2022-01-28 15:50:00,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-28 15:50:00,539 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) Word has length 30 [2022-01-28 15:50:00,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:00,571 INFO L225 Difference]: With dead ends: 14979 [2022-01-28 15:50:00,571 INFO L226 Difference]: Without dead ends: 14928 [2022-01-28 15:50:00,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1897, Invalid=16463, Unknown=0, NotChecked=0, Total=18360 [2022-01-28 15:50:00,572 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 407 mSDsluCounter, 1030 mSDsCounter, 0 mSdLazyCounter, 3415 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 3415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:00,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 626 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 3415 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:50:00,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14928 states. [2022-01-28 15:50:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14928 to 9136. [2022-01-28 15:50:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9136 states, 9135 states have (on average 3.5046524356869186) internal successors, (32015), 9135 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:00,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9136 states to 9136 states and 32015 transitions. [2022-01-28 15:50:00,788 INFO L78 Accepts]: Start accepts. Automaton has 9136 states and 32015 transitions. Word has length 30 [2022-01-28 15:50:00,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:00,789 INFO L470 AbstractCegarLoop]: Abstraction has 9136 states and 32015 transitions. [2022-01-28 15:50:00,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 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) [2022-01-28 15:50:00,789 INFO L276 IsEmpty]: Start isEmpty. Operand 9136 states and 32015 transitions. [2022-01-28 15:50:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:00,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:00,802 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:00,818 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-01-28 15:50:01,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-01-28 15:50:01,003 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:01,003 INFO L85 PathProgramCache]: Analyzing trace with hash -733493224, now seen corresponding path program 60 times [2022-01-28 15:50:01,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:01,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143458084] [2022-01-28 15:50:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:01,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:01,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:01,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143458084] [2022-01-28 15:50:01,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143458084] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130511440] [2022-01-28 15:50:01,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:01,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:01,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:01,297 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) [2022-01-28 15:50:01,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-01-28 15:50:01,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:01,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:01,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:50:01,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:01,535 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:01,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:50:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:01,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:01,960 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:50:01,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:02,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:02,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:02,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:50:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:02,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130511440] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:02,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:02,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 30 [2022-01-28 15:50:02,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306376043] [2022-01-28 15:50:02,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:02,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:50:02,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:50:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=756, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:50:02,263 INFO L87 Difference]: Start difference. First operand 9136 states and 32015 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:50:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:08,086 INFO L93 Difference]: Finished difference Result 16847 states and 56041 transitions. [2022-01-28 15:50:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-28 15:50:08,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) Word has length 30 [2022-01-28 15:50:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:08,125 INFO L225 Difference]: With dead ends: 16847 [2022-01-28 15:50:08,126 INFO L226 Difference]: Without dead ends: 16729 [2022-01-28 15:50:08,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5153 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1645, Invalid=13117, Unknown=0, NotChecked=0, Total=14762 [2022-01-28 15:50:08,127 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 474 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 3552 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 3552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:08,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 727 Invalid, 3765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 3552 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:50:08,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16729 states. [2022-01-28 15:50:08,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16729 to 9134. [2022-01-28 15:50:08,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9134 states, 9133 states have (on average 3.504981933647213) internal successors, (32011), 9133 states have internal predecessors, (32011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9134 states to 9134 states and 32011 transitions. [2022-01-28 15:50:08,360 INFO L78 Accepts]: Start accepts. Automaton has 9134 states and 32011 transitions. Word has length 30 [2022-01-28 15:50:08,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:08,360 INFO L470 AbstractCegarLoop]: Abstraction has 9134 states and 32011 transitions. [2022-01-28 15:50:08,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 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) [2022-01-28 15:50:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 9134 states and 32011 transitions. [2022-01-28 15:50:08,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:08,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:08,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:08,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:08,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:08,574 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:08,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:08,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1608575716, now seen corresponding path program 61 times [2022-01-28 15:50:08,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:08,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836110501] [2022-01-28 15:50:08,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:08,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:08,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:08,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836110501] [2022-01-28 15:50:08,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836110501] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:08,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493137743] [2022-01-28 15:50:08,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:08,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:08,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:08,912 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) [2022-01-28 15:50:08,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-01-28 15:50:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:08,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:50:08,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:09,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:09,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:09,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:50:09,271 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:09,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:09,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:09,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:09,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:09,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:09,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:09,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:09,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:50:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:09,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493137743] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:09,844 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:09,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:50:09,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688541180] [2022-01-28 15:50:09,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:09,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:50:09,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:09,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:50:09,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:09,845 INFO L87 Difference]: Start difference. First operand 9134 states and 32011 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2022-01-28 15:50:17,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:17,322 INFO L93 Difference]: Finished difference Result 15462 states and 50441 transitions. [2022-01-28 15:50:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-28 15:50:17,322 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) Word has length 30 [2022-01-28 15:50:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:17,352 INFO L225 Difference]: With dead ends: 15462 [2022-01-28 15:50:17,353 INFO L226 Difference]: Without dead ends: 15336 [2022-01-28 15:50:17,353 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8269 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2447, Invalid=19309, Unknown=0, NotChecked=0, Total=21756 [2022-01-28 15:50:17,354 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 426 mSDsluCounter, 1373 mSDsCounter, 0 mSdLazyCounter, 3774 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 849 SdHoareTripleChecker+Invalid, 3945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:17,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 849 Invalid, 3945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-28 15:50:17,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15336 states. [2022-01-28 15:50:17,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15336 to 9129. [2022-01-28 15:50:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 9128 states have (on average 3.5047107800175286) internal successors, (31991), 9128 states have internal predecessors, (31991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 31991 transitions. [2022-01-28 15:50:17,564 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 31991 transitions. Word has length 30 [2022-01-28 15:50:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:17,565 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 31991 transitions. [2022-01-28 15:50:17,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 31 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) [2022-01-28 15:50:17,565 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 31991 transitions. [2022-01-28 15:50:17,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:17,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:17,578 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:17,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-01-28 15:50:17,779 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,SelfDestructingSolverStorable135 [2022-01-28 15:50:17,779 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:17,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:17,779 INFO L85 PathProgramCache]: Analyzing trace with hash -18559192, now seen corresponding path program 62 times [2022-01-28 15:50:17,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:17,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419116436] [2022-01-28 15:50:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:17,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:17,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:18,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:18,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419116436] [2022-01-28 15:50:18,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419116436] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:18,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37098286] [2022-01-28 15:50:18,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:50:18,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:18,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:18,122 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) [2022-01-28 15:50:18,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-01-28 15:50:18,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:50:18,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-28 15:50:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:18,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:18,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:18,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:18,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:18,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 19 [2022-01-28 15:50:18,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:18,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:18,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:18,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:18,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:18,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:18,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:18,903 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:18,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:50:19,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:19,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37098286] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:19,083 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:19,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2022-01-28 15:50:19,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920548528] [2022-01-28 15:50:19,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:19,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-28 15:50:19,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:19,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-28 15:50:19,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-01-28 15:50:19,084 INFO L87 Difference]: Start difference. First operand 9129 states and 31991 transitions. Second operand has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:25,520 INFO L93 Difference]: Finished difference Result 15318 states and 49944 transitions. [2022-01-28 15:50:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-28 15:50:25,520 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:50:25,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:25,554 INFO L225 Difference]: With dead ends: 15318 [2022-01-28 15:50:25,554 INFO L226 Difference]: Without dead ends: 15162 [2022-01-28 15:50:25,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5234 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1856, Invalid=13396, Unknown=0, NotChecked=0, Total=15252 [2022-01-28 15:50:25,555 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 389 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 3112 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 3112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:25,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [389 Valid, 803 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 3112 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-28 15:50:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15162 states. [2022-01-28 15:50:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15162 to 9122. [2022-01-28 15:50:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9122 states, 9121 states have (on average 3.5047692139019846) internal successors, (31967), 9121 states have internal predecessors, (31967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9122 states to 9122 states and 31967 transitions. [2022-01-28 15:50:25,775 INFO L78 Accepts]: Start accepts. Automaton has 9122 states and 31967 transitions. Word has length 30 [2022-01-28 15:50:25,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:25,775 INFO L470 AbstractCegarLoop]: Abstraction has 9122 states and 31967 transitions. [2022-01-28 15:50:25,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:25,775 INFO L276 IsEmpty]: Start isEmpty. Operand 9122 states and 31967 transitions. [2022-01-28 15:50:25,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:25,787 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:25,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:25,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:25,988 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,SelfDestructingSolverStorable136 [2022-01-28 15:50:25,988 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:25,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:25,988 INFO L85 PathProgramCache]: Analyzing trace with hash 990382764, now seen corresponding path program 63 times [2022-01-28 15:50:25,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:25,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593159] [2022-01-28 15:50:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:25,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:26,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:26,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593159] [2022-01-28 15:50:26,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:26,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463378795] [2022-01-28 15:50:26,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:50:26,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:26,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:26,361 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) [2022-01-28 15:50:26,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-01-28 15:50:26,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:50:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:26,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:50:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:26,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:26,613 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-01-28 15:50:26,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:26,986 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-28 15:50:26,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:27,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:27,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:27,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:27,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:50:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:27,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463378795] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:27,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:27,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 31 [2022-01-28 15:50:27,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503711393] [2022-01-28 15:50:27,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:27,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:50:27,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:27,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:50:27,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:27,309 INFO L87 Difference]: Start difference. First operand 9122 states and 31967 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2022-01-28 15:50:31,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:31,093 INFO L93 Difference]: Finished difference Result 15278 states and 51138 transitions. [2022-01-28 15:50:31,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-28 15:50:31,094 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) Word has length 30 [2022-01-28 15:50:31,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:31,127 INFO L225 Difference]: With dead ends: 15278 [2022-01-28 15:50:31,127 INFO L226 Difference]: Without dead ends: 15219 [2022-01-28 15:50:31,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2300 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=908, Invalid=6748, Unknown=0, NotChecked=0, Total=7656 [2022-01-28 15:50:31,128 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 436 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 2887 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 2887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:31,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 608 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 2887 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-28 15:50:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15219 states. [2022-01-28 15:50:31,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15219 to 9111. [2022-01-28 15:50:31,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9111 states, 9110 states have (on average 3.5052689352360042) internal successors, (31933), 9110 states have internal predecessors, (31933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9111 states to 9111 states and 31933 transitions. [2022-01-28 15:50:31,386 INFO L78 Accepts]: Start accepts. Automaton has 9111 states and 31933 transitions. Word has length 30 [2022-01-28 15:50:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:31,386 INFO L470 AbstractCegarLoop]: Abstraction has 9111 states and 31933 transitions. [2022-01-28 15:50:31,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 31 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) [2022-01-28 15:50:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 9111 states and 31933 transitions. [2022-01-28 15:50:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:31,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:31,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:31,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:31,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:31,600 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:31,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1542889864, now seen corresponding path program 64 times [2022-01-28 15:50:31,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:31,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351986049] [2022-01-28 15:50:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:31,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:31,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:31,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351986049] [2022-01-28 15:50:31,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351986049] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:31,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547090171] [2022-01-28 15:50:31,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:50:31,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:31,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:31,900 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) [2022-01-28 15:50:31,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-01-28 15:50:31,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:50:31,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:31,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-28 15:50:31,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:32,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:32,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:32,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-01-28 15:50:32,242 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:32,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:32,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:32,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:32,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:32,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:32,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:32,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:50:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:32,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547090171] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:32,865 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:32,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2022-01-28 15:50:32,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061172098] [2022-01-28 15:50:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:32,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-28 15:50:32,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-28 15:50:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=870, Unknown=0, NotChecked=0, Total=1056 [2022-01-28 15:50:32,866 INFO L87 Difference]: Start difference. First operand 9111 states and 31933 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:42,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:42,282 INFO L93 Difference]: Finished difference Result 19231 states and 60669 transitions. [2022-01-28 15:50:42,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-28 15:50:42,282 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:50:42,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:42,322 INFO L225 Difference]: With dead ends: 19231 [2022-01-28 15:50:42,322 INFO L226 Difference]: Without dead ends: 19180 [2022-01-28 15:50:42,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9247 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3774, Invalid=19178, Unknown=0, NotChecked=0, Total=22952 [2022-01-28 15:50:42,323 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 878 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 3512 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 3512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:42,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [878 Valid, 783 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 3512 Invalid, 0 Unknown, 165 Unchecked, 1.9s Time] [2022-01-28 15:50:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19180 states. [2022-01-28 15:50:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19180 to 9188. [2022-01-28 15:50:42,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9188 states, 9187 states have (on average 3.5097420267769674) internal successors, (32244), 9187 states have internal predecessors, (32244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9188 states to 9188 states and 32244 transitions. [2022-01-28 15:50:42,577 INFO L78 Accepts]: Start accepts. Automaton has 9188 states and 32244 transitions. Word has length 30 [2022-01-28 15:50:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:42,577 INFO L470 AbstractCegarLoop]: Abstraction has 9188 states and 32244 transitions. [2022-01-28 15:50:42,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 9188 states and 32244 transitions. [2022-01-28 15:50:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:42,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:42,590 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:42,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-01-28 15:50:42,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:42,790 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:42,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:42,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1384504137, now seen corresponding path program 30 times [2022-01-28 15:50:42,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:42,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932812637] [2022-01-28 15:50:42,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:42,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:42,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:43,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932812637] [2022-01-28 15:50:43,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932812637] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:43,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105898056] [2022-01-28 15:50:43,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:50:43,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:43,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:43,187 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) [2022-01-28 15:50:43,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-01-28 15:50:43,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:50:43,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:43,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:50:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:43,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:43,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:43,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:43,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:50:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:43,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:43,853 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:50:43,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 21 treesize of output 46 [2022-01-28 15:50:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:43,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:43,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:50:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:43,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105898056] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:43,982 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:43,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-01-28 15:50:43,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468239476] [2022-01-28 15:50:43,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:43,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:50:43,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:43,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:50:43,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:43,983 INFO L87 Difference]: Start difference. First operand 9188 states and 32244 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-01-28 15:50:50,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:50,522 INFO L93 Difference]: Finished difference Result 17917 states and 59816 transitions. [2022-01-28 15:50:50,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-28 15:50:50,522 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) Word has length 30 [2022-01-28 15:50:50,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:50,565 INFO L225 Difference]: With dead ends: 17917 [2022-01-28 15:50:50,565 INFO L226 Difference]: Without dead ends: 17795 [2022-01-28 15:50:50,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6741 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2716, Invalid=15106, Unknown=0, NotChecked=0, Total=17822 [2022-01-28 15:50:50,567 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 783 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3480 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 3981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 3480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:50,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 762 Invalid, 3981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [501 Valid, 3480 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:50:50,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17795 states. [2022-01-28 15:50:50,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17795 to 9244. [2022-01-28 15:50:50,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9244 states, 9243 states have (on average 3.5147679324894514) internal successors, (32487), 9243 states have internal predecessors, (32487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:50,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9244 states to 9244 states and 32487 transitions. [2022-01-28 15:50:50,797 INFO L78 Accepts]: Start accepts. Automaton has 9244 states and 32487 transitions. Word has length 30 [2022-01-28 15:50:50,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:50,797 INFO L470 AbstractCegarLoop]: Abstraction has 9244 states and 32487 transitions. [2022-01-28 15:50:50,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 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) [2022-01-28 15:50:50,798 INFO L276 IsEmpty]: Start isEmpty. Operand 9244 states and 32487 transitions. [2022-01-28 15:50:50,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:50,814 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:50,814 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:50,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-01-28 15:50:51,015 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,SelfDestructingSolverStorable139 [2022-01-28 15:50:51,015 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:51,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:51,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1873024825, now seen corresponding path program 31 times [2022-01-28 15:50:51,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:51,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519001593] [2022-01-28 15:50:51,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:51,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:51,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:51,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519001593] [2022-01-28 15:50:51,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519001593] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:51,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473293948] [2022-01-28 15:50:51,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:50:51,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:51,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:51,365 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) [2022-01-28 15:50:51,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-01-28 15:50:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:51,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-28 15:50:51,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-01-28 15:50:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:51,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:51,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,961 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:51,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 40 [2022-01-28 15:50:51,982 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:51,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:51,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 5 [2022-01-28 15:50:52,056 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:52,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473293948] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:52,057 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:52,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 34 [2022-01-28 15:50:52,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071257570] [2022-01-28 15:50:52,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:52,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-28 15:50:52,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:52,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-28 15:50:52,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1028, Unknown=0, NotChecked=0, Total=1190 [2022-01-28 15:50:52,057 INFO L87 Difference]: Start difference. First operand 9244 states and 32487 transitions. Second operand has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:57,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:50:57,957 INFO L93 Difference]: Finished difference Result 17587 states and 58000 transitions. [2022-01-28 15:50:57,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-28 15:50:57,957 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:50:57,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:50:57,999 INFO L225 Difference]: With dead ends: 17587 [2022-01-28 15:50:57,999 INFO L226 Difference]: Without dead ends: 17426 [2022-01-28 15:50:58,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6294 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2333, Invalid=15489, Unknown=0, NotChecked=0, Total=17822 [2022-01-28 15:50:58,001 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 695 mSDsluCounter, 2006 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 1535 SdHoareTripleChecker+Invalid, 4406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-28 15:50:58,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [695 Valid, 1535 Invalid, 4406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 4204 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-28 15:50:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17426 states. [2022-01-28 15:50:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17426 to 9486. [2022-01-28 15:50:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9486 states, 9485 states have (on average 3.507538218239325) internal successors, (33269), 9485 states have internal predecessors, (33269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:58,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9486 states to 9486 states and 33269 transitions. [2022-01-28 15:50:58,251 INFO L78 Accepts]: Start accepts. Automaton has 9486 states and 33269 transitions. Word has length 30 [2022-01-28 15:50:58,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:50:58,251 INFO L470 AbstractCegarLoop]: Abstraction has 9486 states and 33269 transitions. [2022-01-28 15:50:58,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.9714285714285715) internal successors, (69), 34 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:50:58,251 INFO L276 IsEmpty]: Start isEmpty. Operand 9486 states and 33269 transitions. [2022-01-28 15:50:58,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:50:58,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:50:58,265 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:50:58,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-01-28 15:50:58,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:58,466 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:50:58,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:50:58,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1058483508, now seen corresponding path program 65 times [2022-01-28 15:50:58,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:50:58,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344421842] [2022-01-28 15:50:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:50:58,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:50:58,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:50:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:58,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:50:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344421842] [2022-01-28 15:50:58,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344421842] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:50:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948227363] [2022-01-28 15:50:58,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:50:58,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:50:58,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:50:58,814 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) [2022-01-28 15:50:58,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-01-28 15:50:58,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-28 15:50:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:50:58,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2022-01-28 15:50:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:50:59,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:50:59,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-01-28 15:50:59,200 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:59,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:50:59,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:59,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:59,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 19 treesize of output 54 [2022-01-28 15:50:59,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:59,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:50:59,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:50:59,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 20 treesize of output 47 [2022-01-28 15:50:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:50:59,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948227363] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:50:59,772 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:50:59,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 31 [2022-01-28 15:50:59,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361285122] [2022-01-28 15:50:59,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:50:59,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-28 15:50:59,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:50:59,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-28 15:50:59,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2022-01-28 15:50:59,772 INFO L87 Difference]: Start difference. First operand 9486 states and 33269 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:51:09,833 INFO L93 Difference]: Finished difference Result 18969 states and 60261 transitions. [2022-01-28 15:51:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-28 15:51:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-01-28 15:51:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:51:09,871 INFO L225 Difference]: With dead ends: 18969 [2022-01-28 15:51:09,871 INFO L226 Difference]: Without dead ends: 18918 [2022-01-28 15:51:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 44 SyntacticMatches, 16 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12926 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=4343, Invalid=22717, Unknown=0, NotChecked=0, Total=27060 [2022-01-28 15:51:09,872 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 758 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 2087 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 835 SdHoareTripleChecker+Invalid, 5072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2746 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:09,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 835 Invalid, 5072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2087 Invalid, 0 Unknown, 2746 Unchecked, 1.2s Time] [2022-01-28 15:51:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18918 states. [2022-01-28 15:51:10,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18918 to 9503. [2022-01-28 15:51:10,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9503 states, 9502 states have (on average 3.5086297621553357) internal successors, (33339), 9502 states have internal predecessors, (33339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9503 states to 9503 states and 33339 transitions. [2022-01-28 15:51:10,134 INFO L78 Accepts]: Start accepts. Automaton has 9503 states and 33339 transitions. Word has length 30 [2022-01-28 15:51:10,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:51:10,134 INFO L470 AbstractCegarLoop]: Abstraction has 9503 states and 33339 transitions. [2022-01-28 15:51:10,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:51:10,134 INFO L276 IsEmpty]: Start isEmpty. Operand 9503 states and 33339 transitions. [2022-01-28 15:51:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-28 15:51:10,148 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:51:10,148 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:51:10,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2022-01-28 15:51:10,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:10,349 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-28 15:51:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:51:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1430935652, now seen corresponding path program 66 times [2022-01-28 15:51:10,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:51:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898961654] [2022-01-28 15:51:10,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:51:10,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:51:10,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:51:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:10,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:51:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898961654] [2022-01-28 15:51:10,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898961654] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:51:10,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5310322] [2022-01-28 15:51:10,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:51:10,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:10,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:51:10,638 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) [2022-01-28 15:51:10,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-01-28 15:51:10,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-28 15:51:10,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:51:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-28 15:51:10,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:51:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:51:10,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:10,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:10,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 29 [2022-01-28 15:51:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:11,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:51:11,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:11,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:11,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:51:11,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 19 treesize of output 46 [2022-01-28 15:51:11,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:51:11,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 5 [2022-01-28 15:51:11,990 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:51:11,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5310322] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:51:11,990 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:51:11,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 39 [2022-01-28 15:51:11,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304089639] [2022-01-28 15:51:11,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:51:11,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-28 15:51:11,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:51:11,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-28 15:51:11,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:51:11,991 INFO L87 Difference]: Start difference. First operand 9503 states and 33339 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 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) Received shutdown request... [2022-01-28 15:51:43,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 327 states. [2022-01-28 15:51:43,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52567 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=14052, Invalid=106704, Unknown=0, NotChecked=0, Total=120756 [2022-01-28 15:51:43,613 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 1132 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 4694 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1132 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 7066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 4694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1830 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-28 15:51:43,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1132 Valid, 813 Invalid, 7066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 4694 Invalid, 0 Unknown, 1830 Unchecked, 2.6s Time] [2022-01-28 15:51:43,614 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-28 15:51:43,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-01-28 15:51:43,629 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-28 15:51:43,630 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 [2022-01-28 15:51:43,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:51:43,816 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (9503states) and FLOYD_HOARE automaton (currently 327 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (4593 states constructed, input type IntersectNwa). [2022-01-28 15:51:43,817 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-28 15:51:43,817 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-28 15:51:43,817 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-28 15:51:43,819 INFO L732 BasicCegarLoop]: Path program histogram: [66, 34, 31, 6, 3, 2, 1] [2022-01-28 15:51:43,820 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-28 15:51:43,820 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-28 15:51:43,821 INFO L202 PluginConnector]: Adding new model array-sum-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 03:51:43 BasicIcfg [2022-01-28 15:51:43,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-28 15:51:43,822 INFO L158 Benchmark]: Toolchain (without parser) took 753430.60ms. Allocated memory was 192.9MB in the beginning and 896.5MB in the end (delta: 703.6MB). Free memory was 158.7MB in the beginning and 655.7MB in the end (delta: -497.0MB). Peak memory consumption was 208.2MB. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.16ms. Allocated memory is still 192.9MB. Free memory is still 159.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.52ms. Allocated memory is still 192.9MB. Free memory was 158.6MB in the beginning and 157.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 INFO L158 Benchmark]: Boogie Preprocessor took 16.27ms. Allocated memory is still 192.9MB. Free memory was 157.0MB in the beginning and 156.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 INFO L158 Benchmark]: RCFGBuilder took 234.66ms. Allocated memory is still 192.9MB. Free memory was 156.0MB in the beginning and 147.0MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 INFO L158 Benchmark]: TraceAbstraction took 753150.54ms. Allocated memory was 192.9MB in the beginning and 896.5MB in the end (delta: 703.6MB). Free memory was 146.5MB in the beginning and 655.7MB in the end (delta: -509.1MB). Peak memory consumption was 195.6MB. Max. memory is 8.0GB. [2022-01-28 15:51:43,822 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 0.16ms. Allocated memory is still 192.9MB. Free memory is still 159.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.52ms. Allocated memory is still 192.9MB. Free memory was 158.6MB in the beginning and 157.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 16.27ms. Allocated memory is still 192.9MB. Free memory was 157.0MB in the beginning and 156.0MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 234.66ms. Allocated memory is still 192.9MB. Free memory was 156.0MB in the beginning and 147.0MB in the end (delta: 9.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 753150.54ms. Allocated memory was 192.9MB in the beginning and 896.5MB in the end (delta: 703.6MB). Free memory was 146.5MB in the beginning and 655.7MB in the end (delta: -509.1MB). Peak memory consumption was 195.6MB. Max. memory is 8.0GB. * 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: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9503states) and FLOYD_HOARE automaton (currently 327 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (4593 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9503states) and FLOYD_HOARE automaton (currently 327 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (4593 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9503states) and FLOYD_HOARE automaton (currently 327 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (4593 states constructed, input type IntersectNwa). - TimeoutResultAtElement [Line: 52]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9503states) and FLOYD_HOARE automaton (currently 327 states, 39 states before enhancement),while ReachableStatesComputation was computing reachable states (4593 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 753.1s, OverallIterations: 143, TraceHistogramMax: 2, PathProgramHistogramMax: 66, EmptinessCheckTime: 1.2s, AutomataDifference: 594.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 68910 SdHoareTripleChecker+Valid, 133.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68910 mSDsluCounter, 71852 SdHoareTripleChecker+Invalid, 113.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27411 IncrementalHoareTripleChecker+Unchecked, 118510 mSDsCounter, 20297 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 286336 IncrementalHoareTripleChecker+Invalid, 334044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 20297 mSolverCounterUnsat, 5451 mSDtfsCounter, 286336 mSolverCounterSat, 0.8s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 18705 GetRequests, 5737 SyntacticMatches, 439 SemanticMatches, 12529 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 707946 ImplicationChecksByTransitivity, 480.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9503occurred in iteration=142, InterpolantAutomatonStates: 11024, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 20.6s AutomataMinimizationTime, 142 MinimizatonAttempts, 637236 StatesRemovedByMinimization, 142 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 105.3s InterpolantComputationTime, 7779 NumberOfCodeBlocks, 7776 NumberOfCodeBlocksAsserted, 435 NumberOfCheckSat, 11173 ConstructedInterpolants, 206 QuantifiedInterpolants, 151516 SizeOfPredicates, 1557 NumberOfNonLiveVariables, 8500 ConjunctsInSsa, 2385 ConjunctsInUnsatCore, 413 InterpolantComputations, 9 PerfectInterpolantSequences, 320/2527 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